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Electrical 265
- 120/240 V Generator Leg Balance
- 4-20 mA Current-Loop Signal Scaling
- 70-Volt Distributed Speaker Line
- Access-Control Power Supply and Standby Battery
- Arc-Flash Incident-Energy Screen (Lee 1982)
- Arc-Welder Branch-Circuit Conductor and OCPD (NEC 630.11)
- Asymmetrical and Peak Fault Current from X/R
- AWG Conductor Geometry (Diameter, Circular Mils, mm^2)
- Battery Bank Series/Parallel Configuration
- Battery C-Rate: Deliverable Power and Discharge Duration
- Battery Peak-Shaving Demand-Charge Savings
- Battery Room Hydrogen Ventilation (IEEE 1635)
- Battery Room Max Charge Current from Available Airflow
- Battery Runtime
- Battery Time-of-Use Arbitrage Value
- Battery-to-Inverter DC Conductor and OCPD (NEC 690.9 / 706)
- Bifacial PV Rear-Side Gain
- Bonding Jumper Sizing (Supply-Side and Equipment)
- Box Fill
- Branch Voltage Drop With Multiple Loads
- Branch-Circuit Conductor Footage Takeoff
- Breaker Sizing
- Buck-Boost Transformer Sizing (Single-Phase)
- Cable Bend Radius Minimum
- Cable Reel Capacity / Length on Reel
- Cable Tray Fill
- Cable-Pulling Lubricant Quantity
- Camera Lens FOV and Pixel Density (DORI)
- Camera Max Distance for a Pixel Density (DORI)
- Capacitor Discharge Time and Bleed Resistor (NEC 460.6)
- Cathodic Protection Rectifier Sizing
- CCTV Retention Days from Disk Capacity
- Ceiling Speaker Coverage and Spacing
- Ceiling Speaker Coverage Angle for a Target Spacing
- Clock Time to Solar Time (Equation of Time and Longitude)
- Coaxial Cable Attenuation
- Commercial General-Lighting and Receptacle Load (NEC 220.42(A) / 220.47)
- Concentric Conduit Bend Radii and Lengths
- Conductor Ambient and Fill Ampacity Adjustment
- Conductor Blowout and Horizontal Clearance
- Conductor Long-Term Creep and Sag Increase
- Conductor Pulling Tension
- Conductor Resistance at Temperature
- Conductor Sag Change With Temperature
- Conductor Short-Circuit Thermal Withstand (Onderdonk / ICEA)
- Conduit 90 Stub and Back-to-Back
- Conduit Bends Between Pull Points (360-Degree Rule)
- Conduit Fill
- Conduit Jam Ratio for Three Same-Size Conductors (NEC Ch. 9)
- Conduit Nipple 60% Fill (NEC Ch. 9 Note 4)
- Conduit Offset Bend
- Conduit Saddle Bend
- Conduit Segment Bend Layout
- Continuous-Load OCPD and Conductor at 125% (NEC 210.20 / 215.3)
- Counterpoise and Radial Ground Array Resistance
- Critical Load Priority Shedding
- Current-Limiting Let-Through and Downstream Withstand
- Data Center PUE and Cooling Overhead
- DC Ammeter Shunt Sizing
- Distribution Feeder I2R Loss and Loss Factor
- Distribution Transformer Diversified Loading
- DP (Square-Root) Flow Transmitter 4-20 mA Scaling
- Dwelling Service/Feeder Conductor at 83% (NEC 310.12)
- Economic Conductor Sizing (I2R Payback)
- EGC for Parallel Raceways (NEC 250.122(F))
- EGC Proportional Upsize for Increased Conductors (NEC 250.122(B))
- Egress Lighting Illuminance Compliance Check (NFPA 101 / IBC)
- Electric Strike and Maglock Power, Inrush, and Standby Budget
- Equipment Grounding Conductor Sizing
- EV Charge Cost at the Meter
- EV Charge Time (AC Level 2)
- EV Charger Continuous Load and Panel Impact
- EV Charger Throttled-Current Schedule (NEC 625.42)
- EV DC Fast-Charge Time (CC-CV Taper)
- EV Load-Management (EVEMS) Diversified Load (NEC 625.42)
- EV Range Added per Hour of Charging
- Existing-Facility Load by Peak Demand (NEC 220.87)
- Feeder for a Group of Motors (NEC 430.24 / 430.62)
- Feeder Sizing for Multiple Motors
- Feeder Tap Conductor 10-ft / 25-ft Rule (NEC 240.21(B))
- Feeder/Service Neutral Demand Load (NEC 220.61)
- Fiber Chromatic Dispersion Penalty and Reach
- Fiber Max Length for a Loss Budget
- Fiber Optic Loss Budget
- Fiber Slack Loop and Splice Enclosure Reserve
- Fiber Strand Count from Homes Passed and Split Architecture
- Fire-Alarm / Security Standby Battery
- Fire-Alarm NAC Circuit Voltage Drop (End-of-Line)
- Free-Space Path Loss (Wireless Bridge)
- Fresnel Zone Radius and 60% Clearance
- Fusion Splice Loss from Fiber and Geometry Mismatch
- Generator Fuel at Part Load and Minimum-Load Check
- Generator Fuel Runtime and Backup Duration
- Generator Output Conductor at 115% (NEC 445.13)
- Generator Output Derate for Altitude and Temperature
- Generator Sizing
- Generator Sizing for Motor Starting
- Generator-Battery Hybrid Fuel Savings
- GFCI / AFCI Requirements Reference
- Gin-Pole and Uptower Component Lift Load
- Ground Grid Conductor Sizing for Fault Current
- Ground Potential Rise Screen (IEEE 80)
- Grounding Electrode Conductor Sizing
- Grounding Electrode Resistance (Dwight / IEEE 142)
- Guy Anchor Holding Capacity in Soil
- Harmonic Parallel-Resonance Order
- Household Clothes Dryer Demand Load (NEC 220.54)
- Household Range Demand Load (NEC Table 220.55 Col. C)
- Hydrostatic DP Level Transmitter (Head to Level)
- Industrial Control Panel SCCR (UL 508A)
- Instrument Loop Total Error Stackup
- Insulation Resistance PI / DAR (Megger Test)
- Inverter AC Output Circuit Conductor and OCPD (NEC 690.8(B))
- IP Camera / NVR Storage and Bandwidth
- J-Hook / Bridle-Ring Count and Bundle Weight
- Kitchen Countertop Receptacles (NEC 210.52(C))
- LED Lighting Retrofit Savings and Payback
- Lighting Illuminance Uniformity Ratio
- Lighting Light-Loss Factor (Maintained/Initial)
- Lighting Power Density
- Lightning Rolling-Sphere Zone of Protection
- Line Capacitor Bank Voltage Rise
- Line Voltage Regulator Tap and Bandwidth
- Loop-Powered (2-Wire) 4-20 mA Transmitter Voltage Budget
- Low-Voltage Cable Footage and Box Count
- Low-Voltage DC Drop
- Lumen-Method Luminaire Count
- Luminaire Mounting Height for a Target Illuminance
- Luminaire Spacing-to-Mounting-Height Ratio
- Lux / Footcandle Converter and Lumen Method
- Maglock Effective Holding Force at the Door Handle
- Max Capacitor kVAR at Motor Terminals (Self-Excitation Limit)
- Max Grounding-Grid Resistance for the GPR Screen (IEEE 80)
- Max Microinverters per AC Branch Circuit (NEC 705.60)
- Max Motor HP for a Starting-Current Budget (NEC 430.7(B))
- Maximum Circuit Length for a Voltage-Drop Target
- Microduct Fill Ratio and Cable Jetting Air
- Minimum Conductor Size for a Voltage-Drop Target
- Motor Across-the-Line Acceleration Time
- Motor Branch-Circuit from Nameplate
- Motor Branch-Circuit Protection and Disconnect (NEC 430.52 / 430.110)
- Motor Derating for Voltage Unbalance (NEMA MG-1)
- Motor Full Load Amps
- Motor Input Power, Annual Energy, and Cost
- Motor Locked-Rotor Current from Code Letter (NEC 430.7(B))
- Motor Pole Count from Nameplate RPM
- Motor RMS Horsepower for a Duty-Cycle Load
- Motor Run Hours for an Energy Budget
- Motor Running Overload Protection (NEC 430.32)
- Motor Shaft Torque, Horsepower, and Speed
- Motor Short-Circuit Contribution (First Cycle)
- Motor Starting Voltage Dip
- Motor Synchronous Speed, Slip, and Rotor Frequency
- MPPT Charge Controller Output Current
- Multiwire Branch Circuit (3-Wire) Voltage Drop
- NEC Pull and Junction Box Sizing
- NESC Ice-and-Wind District Loading on a Conductor
- Neutral Grounding Resistor Sizing (IEEE 142)
- Noncoincident Loads: Larger of Heating vs A/C (NEC 220.60)
- NTC Thermistor Resistance to Temperature (Beta Equation)
- NTC Thermistor Steinhart-Hart Equation (3-Constant)
- Off-Grid Battery Bank Sizing
- Ohm's Law
- Open-Delta (V-V) Transformer Bank Capacity
- Optical Return Loss and Connector Reflectance
- OTDR Event Distance and Index of Refraction
- Overcurrent Selective Coordination Screen
- Overhead Line Ground Clearance
- Panel Loading and Phase Rebalance
- Parallel Conductor Ampacity
- Paralleled Generator Droop Load Sharing
- PDU Branch Loading and Failover Capacity
- PF Capacitor Bank for a Target Resonant Order
- Phase Balance Across Panels
- PID Loop Tuning (Ziegler-Nichols Closed-Loop)
- PoE Budget and Run Distance
- Point-Method Illuminance (Inverse-Square + Cosine)
- Point-Method Required Candela for a Target
- PON Split Ratio and Optical Loss Budget
- Power Factor Correction Capacitor
- Power Triangle Solver (kW / kVA / kVAR / PF)
- Power-Factor Correction Demand-Billing Savings
- Premium Motor Upgrade Energy Savings
- Pulse Flowmeter K-Factor (Frequency to Flow)
- PV Annual Energy, Specific Yield, and Capacity Factor
- PV Array Size from a Target Annual Energy
- PV Cell Temperature and Temperature-Derated Power
- PV Circuit Maximum Current and Ampacity (NEC 690.8, the 156% Rule)
- PV Equipment Grounding Conductor (NEC 690.45)
- PV Flat-Roof Ballast Weight and Roof PSF Screen
- PV Inter-Row Spacing and Ground-Coverage Ratio
- PV Interconnection 120% Busbar Rule
- PV Inverter Loading Ratio (DC:AC) and Clipping Onset
- PV Max Ambient Temperature for a Target Power
- PV Performance Ratio from Stacked Losses
- PV Racking Rail, Clamp, and Splice Takeoff
- PV Shade-Free Sun Angle from Row Pitch
- PV Source-Circuit Fuse Sizing (NEC 690.9)
- PVC Conduit Max Run Before an Expansion Fitting
- PVC Conduit Thermal Expansion (NEC 352.44)
- PVC Raceway Expansion Fitting
- Raceway / Cable Support-Spacing Lookup (NEC Chapter 3)
- Radio and Communications Site Duty-Cycle Battery
- Recloser-to-Fuse Coordination Screen
- Reduced-Voltage Starter Current and Torque
- Required Wall Receptacles by the 6-Foot Rule (NEC 210.52(A))
- Resistance / Spot-Welder Branch-Circuit Conductor and OCPD (NEC 630.31)
- Rooftop Conduit Sunlight Ambient Adder (NEC 310.15(B)(2))
- Room Cavity Ratio (RCR) for CU Lookup
- Rotary Phase Converter Idler Sizing
- RTD (Pt100 / Pt1000) Resistance to Temperature
- Ruling (Equivalent) Span for a Line Section
- Sagging by Stopwatch (Return-Wave Method)
- Series R-L-C Reactance, Impedance, and Resonant Frequency
- Service Entrance Demand Load (Standard Method)
- Service Load Calculation (NEC 220.82 Optional Method)
- Service Load Calculation (Residential)
- Shock Approach Boundaries (NFPA 70E Table 130.4)
- Short-Circuit Current at Panel (Point-to-Point)
- Solar Altitude / Winter-Design Sun Elevation
- Solar Azimuth (Sun Compass Bearing)
- Solar PV String Sizing
- Standby Battery Runtime from Capacity
- Structured Cabling Channel Length (TIA-568)
- Sun Shadow Length
- Suspension Insulator Uplift Check at a Low Point
- Swimming-Pool Equipotential Bonding Checklist (NEC 680.26)
- Temporary Housing Park Service Demand
- Termination Temperature Ampacity Limit (NEC 110.14(C))
- Three-Phase Neutral Current
- Three-Phase Power
- Tolerable Step and Touch Voltage (IEEE 80)
- Total Demand Distortion Limit Check (IEEE 519-2022)
- Transformer Conductor and Overcurrent Protection
- Transformer Inrush Coordination Point
- Transformer K-Factor From the Harmonic Spectrum (UL 1561)
- Transformer kVA Sizing and FLA
- Transformer Loading Efficiency and Losses
- Transformer Sizing
- Transformer Turns / Voltage / Current / Impedance Ratio
- Transformer Voltage Regulation from %R and %X
- Transmitter Span, Turndown, and 4-20 mA Accuracy
- Transverse Wind Load on Conductor and Pole
- Underground Burial Cover-Depth Lookup (NEC Table 300.5)
- Underground Duct-Bank Ampacity Derate
- UPS Module Count, Redundancy, and Efficiency
- VFD Reflected-Wave Cable Length Limit
- VFD Retrofit Energy and Cost Savings (Affinity Cube Law)
- Voltage Drop
- Voltage Drop With Reactance
- Voltage Imbalance
- Watt-Hour Meter CT / PT Multiplier
- Wenner 4-Pin Soil Resistivity
- Wind Power Density, the Betz Limit, and Rotor Output
- Wind Shear Power-Law Speed at Hub Height
- Wind Turbine Output Air-Density Correction
- Wind Turbine Tip-Speed Ratio and Rotor Speed
- Wind Turbine Yaw Misalignment Power Loss
- Wind Weibull Distribution, Annual Energy, and Capacity Factor
- Wire Ampacity
- Wireless Link Budget (EIRP and Fade Margin)
- Wireway / Auxiliary Gutter 20% Fill (NEC 376.22)
- Wood Pole Class and Groundline Moment
- Working-Space Clearance Lookup (NEC 110.26)
- Wye / Delta Line-to-Phase Voltage and Current
Plumbing and Gas 155
- Accessible Toilet Compartment Sizing (2010 ADA Standards 604.8)
- Acid Waste Neutralization Tank Sizing
- ADA Grab Bar Layout and Blocking Load
- Air Admittance Valve Installation Check (IPC 918)
- ASME UG-27 Shell Thickness (Joint Efficiency and Corrosion)
- ASME UG-32 Formed-Head Thickness (Ellipsoidal, Hemispherical, Torispherical)
- Atmospheric Tank Vent Sizing (API 2000)
- Backflow Assembly Sizing Screen
- Backflow Preventer Pressure Loss
- Backflow Reference
- Bernoulli Total Head (Pressure + Velocity + Elevation)
- Boiler Horsepower, Steam Output, and EDR
- Box Culvert Headwater by Inlet Control (HDS-5)
- Box Culvert Headwater by Outlet Control (HDS-5)
- Branch Connection Reinforcement (Area Replacement, ASME B31.1)
- Branch Saddle Cutback Template (Pipe-on-Pipe)
- Circular Pipe Partial-Flow Depth and Velocity (Manning)
- Composite Curve Number (Impervious Area)
- Condensate Return Line Size From the Flash Steam
- Cross-Connection Air Gap (IPC Table 608.16.1)
- Culvert Headwater by Inlet Control (HDS-5)
- Culvert Headwater by Outlet Control (HDS-5)
- Curve Number Runoff Depth (SCS/NRCS)
- Drainage Cleanout Layout (IPC 708)
- Drainage Invert Elevation, Drop, and Cover
- Drainage Slope
- Dry Well / Infiltration Trench Sizing
- DWV Vent-Stack DFU / Length Check
- Expansion Joint / Loop Guide Spacing (EJMA 4D/14D)
- Filled Pipe Support Load per Hanger
- Flange Pressure-Temperature Rating (ASME B16.5)
- Flare Thermal Radiation Safe Distance (API 521)
- Flash Steam Percentage Across a Pressure Drop
- Flow Continuity Velocity at a Size Change
- Freeze-Protection Heat-Trace Cable and Circuit
- Friction Loss
- Fuel-Gas Pipe Capacity (Spitzglass)
- Gas Appliance Connected Load (CFH)
- Gas Appliance Connection Check (IFGC 408.4 / 409.5 / 411.1.3.1)
- Gas Leak Equivalent Hole Diameter
- Gas Leak Rate (Orifice)
- Gas Pipe Sizing
- Glycol Freeze Protection Mix
- Governing Box Culvert Headwater (HDS-5)
- Governing Culvert Headwater (HDS-5)
- Grease Interceptor Flow Capacity
- Grease Trap Sizing
- High-Altitude Appliance Input Derate
- Hot Water Recirc Loop Sizing (ASPE)
- Hot Water Recirc Pump Head
- Hydraulic Jump: Sequent Depth and Energy Loss
- Hydronic Expansion Tank
- Hydronic Fill Pressure (Static Height)
- Hydronic Radiant Floor Loop Sizing
- Hydronic System Water and Glycol Volume
- Hydrostatic Test Pressure and Hold
- Leach-Field / Trench Drainrock Volume
- Low-Pressure Fuel-Gas Pressure Drop (Spitzglass)
- LP-Gas Container Separation Check
- Manning Pipe Capacity (Full-Bore Gravity Flow)
- Manning's Equation Drainage Slope
- Max Line Pressure for a Thrust Block (AWWA M41)
- Max Tributary Drainage Area for an Allowable Flow
- Medical Gas System Demand and Diversity (NFPA 99)
- Minimum Hanger Rod Diameter from Load (MSS SP-58)
- Mixing / Tempering Valve Blend Temperature
- Natural-Gas / Propane Conversion (Input and Orifice)
- Open-Channel Froude Number, Regime, and Critical Depth
- Open-Channel Specific Energy and Alternate Depth
- Orifice Diameter for a Target Flow
- Orifice Discharge Flow
- Overflow Scupper Sizing (Weir Flow)
- PEX Home-Run Manifold Port and Tubing Takeoff
- Pipe Cold Spring (Cut-Short)
- Pipe Hanger Spacing and Count
- Pipe Inert Purge Volume and Time
- Pipe Insulation and Jacket Material Takeoff
- Pipe Pressure Rating and Required Wall (ASME B31.1)
- Pipe Sizing
- Pipe Thermal Expansion
- Pipe Thermal Expansion and Loop Sizing
- Pipe Velocity and Erosion Check
- Pipe Volume
- Plumbing Fixture Clearances (IPC 405.3.1)
- Pressure Conversion
- Probable Peak Demand (WSFU to GPM)
- Propane Run Time and Refill Interval
- Propane Tank Filling Limit and Outage
- Propane Tank Vaporization Capacity
- Propane Two-Stage Regulator Capacity
- Pump Operating Point
- Pump Sizing
- Radiator EDR to Heat Output
- Radon Fan Static Pressure and Pipe Velocity
- Radon Sub-Slab Suction Points From a Communication Test
- Rectangular Channel Normal Depth (Manning)
- Reducer Centerline Offset and Invert Continuity
- Roof Drain and Leader Sizing
- Sanitary Drain DFU Sizing
- Scupper Width for a Required Overflow Flow
- Septic Drainfield Capacity (Flow / Bedrooms)
- Septic Drainfield Trench Length
- Septic LPP Orifice Flow and Squirt Height
- Septic LPP Squirt Head for a Target Orifice Flow
- Septic Pump / Dose Tank Volume
- Septic Tank Pump-Out Interval
- Septic Tank Size for a Target Pump-Out Interval
- Septic Tank Sizing
- Sewage Force-Main Scour Velocity
- Shower Compartment Size (IPC 421.4)
- Solar Thermal Collector Output
- Solder and Flux per Sweat-Joint Takeoff
- Static Pressure Loss in Piping
- Steam Boiler Surface Blowdown (Cycles of Concentration)
- Steam Main Capacity from Size and Velocity
- Steam Main Size from Flow and Velocity
- Steam Orifice / PRV Capacity (Napier)
- Steam PRV Orifice Area for a Required Capacity (Napier)
- Steam Trap Condensate Load and Required Capacity
- Storage Water-Heater Sizing (First-Hour Rating)
- Stormwater Detention Volume (Modified Rational)
- Stormwater Rational Method
- Sump / Ejector Basin Drawdown and Cycle Check
- Tank Drain Time (Falling-Head Orifice)
- Tankless Water Heater GPM
- Thermoplastic Pipe Pressure Derating vs Temperature
- Thrust Block Bearing Area at a Pipe Bend (AWWA M41)
- Time of Concentration (Kirpich)
- Time of Concentration (TR-55 Velocity Method)
- TR-55 Detention Storage Volume
- TR-55 Graphical Peak Discharge
- Trap Arm Length
- Trap Primer Sizing
- Trap-Seal Protection Check
- Trapezoidal Channel / Swale Capacity (Manning)
- Two-Phase Separator Retention and Gas Capacity
- Velocity Head and Dynamic Pressure
- Vent Terminal Height, Frost Closure, and Location (IPC 903)
- Vertical Tank Strapping and Gauge Conversion
- Water Hammer Arrestor Sizing
- Water Hammer Pressure Surge (Joukowsky)
- Water Heater Input for a Target Recovery
- Water Heater Recovery Rate
- Water Heater Thermal Expansion Tank
- Water Main Chlorination Dose
- Water Meter Sizing from Peak Demand
- Water Pipe Freeze Time
- Water Service Pressure, PRV, and the Closed System (IPC 604.8 / 607.3)
- Water Softener Sizing
- Water Thermal-Expansion Volume
- Water-Heater T&P Relief and Discharge
- Water-Supply Pressure Budget
- Well Pressure-Tank Drawdown and Sizing
- Well Shock-Chlorination Dose
- Wobbe Index (Fuel-Gas Interchangeability)
HVAC 223
- Add-a-Hole Zone Leakage (Flow Through an Attic, Garage or Crawl Space)
- ADPI Room Air Diffusion Selection (ASHRAE)
- Air Changes per Hour (ACH)
- Air Density Correction for Altitude and Temperature (ACFM/SCFM)
- Air-Free CO Correction
- Air-Side Economizer Free-Cooling Hours
- Ammonia Refrigeration Charge Inventory and PSM Threshold
- Annual Heating Energy and Fuel Cost from Degree-Days
- Approach and Delta-T Diagnostics
- ASHRAE 62.1 Outdoor-Air Ventilation
- ASHRAE 62.1 Ventilation Rate Procedure (Multiple-Zone, Critical Zone, System Efficiency)
- ASHRAE 62.2 Whole-House Mechanical Ventilation Rate
- Auxiliary Condensate Drain Pan (IRC M1411.3.1)
- BACnet MS/TP Segment Loading and Token Loop Time
- Bare Flat Surface Heat Loss (Convection + Radiation)
- Bare Pipe Heat Loss (Convection and Radiation)
- Baseboard Length for a Room Load
- Bathroom and Kitchen Exhaust Fan Sizing
- Belt Length and Pulley Speed
- Blower-Door Air-Tightness (ACH50, Natural Infiltration, Code Check)
- Blown Insulation Coverage
- Boiler Blowdown Heat Recovery and Efficiency Gain
- Boiler Distribution Pipe Sizing
- Boiler Safety Valve Relieving Capacity
- Buffer Tank with Distribution-Loop Credit
- Building Temperature Drift in a Heating Outage
- Building Tightness Limit vs Minimum Ventilation (When Air Sealing Needs a Fan)
- Ceiling Plenum Return Path Pressure Drop
- CFM per Ton
- Chilled-Water Low Delta-T Screen and Pump Penalty
- Chilled-Water Thermal Ride-Through
- Chiller Staging Point and Part-Load Efficiency
- Chiller Tonnage (Delta-T and GPM)
- Chimney Height for a Target Draft
- CO2 Transcritical Gas Cooler Optimum Pressure
- Coil Bypass Factor and Apparatus Dew Point
- Coil Capacity Verification From Measured Air and Water
- Combustion Air
- Combustion Appliance Zone Depressurization Limit (Worst-Case Backdraft Test)
- Combustion Lambda and Air-Fuel Ratio
- Commercial Kitchen Hood Exhaust (IMC 507)
- Compare Two Refrigerants
- Compressed Air Receiver Sizing
- Compressed-Air Compression Power (Isentropic) and Energy Cost
- Compressed-Air Discharge-Pressure Setpoint Savings
- Compressed-Air Leak Load and Annual Cost (Load/Unload Test)
- Compressed-Air Pipe Pressure Drop
- Compressor Short-Cycle Protection
- Compressor Theoretical Displacement
- Compressor Volumetric Efficiency (Clearance Re-Expansion)
- Condensate Drain Trap Depth from Fan Static
- Condensate Rate and Drain Size
- Condenser TD and Condensing Temperature (Dry or Wet Bulb)
- Condenser Total Heat of Rejection
- Condensing Appliance Flue Condensate Rate
- Continuous vs Cavity Insulation Ratio for Condensation Control
- Control Damper Authority and Leakage
- Control Valve Authority (Beta)
- Cooling Coil Face Area for a Target Velocity
- Cooling Coil Face Velocity and Carryover Check
- Cooling Coil Total Load from Enthalpy Difference
- Cooling Tower Approach and Range
- COP Implied by the Heat of Rejection
- CRAC Sensible Capacity and Return-Air Derate
- Cryogenic Tank Boil-Off Rate and Hold Time
- Damper Actuator Torque and Sizing
- Darcy Friction Factor (Swamee-Jain / Colebrook)
- Deadband, Differential, and Equipment Cycling Rate
- Deaerator Steam Demand and Vent Rate
- Demand-Controlled Ventilation Rate from a CO2 Setpoint
- Differential-Pressure Flow Meter (Orifice / Venturi)
- Draft-Hood Dilution Ratio
- Dry-Bulb from Enthalpy and Humidity Ratio
- Dual-Fuel Economic Switchover (Heat Pump vs Gas Balance Point)
- Duct Breakout Noise and Lagging
- Duct Friction Loss and Static Pressure
- Duct Heat Gain/Loss Through Unconditioned Space
- Duct Leakage Test-and-Balance
- Duct Silencer Insertion Loss and Pressure Drop
- Duct Sizing
- Duct Static Regain at a Velocity Decrease
- Duct Transition (Reducer) Length from Slope
- Duct Velocity Pressure
- Economic (Least-Cost) Insulation Thickness
- Economizer Enthalpy Changeover
- Effective Leakage Area and Normalized Leakage (Blower Door to Square Inches of Hole)
- Equivalent Length of Fittings
- ERV Total Enthalpy Recovery
- ERV/HRV Sensible Effectiveness and Recovered Load
- Evaporative (Swamp) Cooler Leaving Temperature
- Evaporator Defrost Heat and Cycle Time
- Evaporator Design TD and Humidity Band
- Excess Air from Flue-Gas O2
- Fan Affinity Laws
- Fan Affinity Laws (Speed Change)
- Fan Brake Horsepower
- Fan Max Airflow from Motor Power
- Fan Sheave Change for a Target CFM
- Fan System Effect and Installed Performance
- Filter Pressure Drop and Fan-Energy Penalty
- Fixed-Orifice Target Superheat (Charging)
- Flat-Oval Duct Equivalent Round Diameter
- Flow Hood Reading Correction and Diffuser Airflow
- Flue-Gas Combustion Efficiency (Stack Loss)
- Freezer Slab Underfloor Heat and Frost Heave
- Fuel Oil Heating for Atomizing Viscosity
- Fume Hood Face Velocity and Exhaust CFM
- Furnace Airflow to Temperature Rise
- Furnace Temperature Rise and Derived Airflow
- Gas (Compressible) Differential-Pressure Flow Meter
- Gas-Meter Clock Target Time
- Gas-Meter Clocking (Actual Firing Rate)
- Geothermal Loop Length
- Glycol Fluid Factor and Solution Properties (Propylene Glycol)
- Greenhouse Thermal Screen Energy Saving
- Grille Neck Velocity and NC Level
- Grille/Register Face Velocity and Free-Area Sizing
- Ground Loop Flow, Antifreeze, and Pump Power
- Heat Exchanger LMTD and Effectiveness-NTU
- Heat Pump Balance Point
- Heat-Pump Cold-Temperature Capacity and Auxiliary Heat
- Heat-Pump Seasonal Heating Energy and Cost vs Gas and Resistance
- Hot-Aisle Containment Bypass Airflow
- Humidifier Capacity (RH Target)
- HVAC Equipment Circuit (MCA / MOCP)
- Hydronic Baseboard Output
- Hydronic Buffer Tank Sizing (Anti-Short-Cycle)
- Hydronic Injection-Mixing Loop Flow
- Hydronic Outdoor Reset Ratio and Supply Target
- Hydronic Snowmelt Load and Boiler Sizing (ASHRAE)
- Hydronic System Flow from Load and Delta-T
- Indirect Evaporative Cooler Leaving Temperature
- Infiltration Heating / Cooling Load (Sensible + Latent)
- Insulated Pipe Heat Loss (Radial)
- Internal Heat Gains: People, Lighting, Equipment
- Isolator Static Deflection for a Target Isolation
- Laboratory Containment Offset and Pressure Direction
- Latent Heat Evaporative Cooling
- Line-Set Length Refrigerant Charge Adder
- Liquid-Line Subcooling to Prevent Flash Gas
- Louver Free Area, Velocity, and Water Penetration
- Low-Ambient Head Pressure Control and Winter Charge
- Makeup-Air Unit Tempering Load (Sensible, Latent, Total)
- Manual D Friction Rate (Available Static Pressure)
- Manual J Cooling Load (Simplified)
- Manual J Heating Load (Simplified)
- Max Appliance Input from Room Volume
- Measured Outside-Air Percent from Mixed-Air Temperatures
- Mechanical Room Sound Transmission and Flanking
- Moist Air Enthalpy (ASHRAE Psychrometrics)
- Natural-Gas Flue-Gas Water Dew Point
- Nitrogen Pressure Test (Temperature-Corrected)
- Oil Burner Nozzle Firing Rate (GPH)
- Opaque-Envelope Conduction Cooling Load (Sol-Air CLTD)
- Orifice Discharge Coefficient (Reader-Harris/Gallagher, ISO 5167-2)
- Orifice Permanent (Unrecovered) Pressure Loss (ISO 5167)
- Outdoor Air Mix
- Pipe Flow Reynolds Number and Regime
- Pipe Insulation for Condensation Control (Cold Lines)
- Pipe Insulation Heat Loss (bare vs insulated)
- Pipe Insulation Thickness
- Pipe Insulation Thickness for a Target Heat Loss
- Pitot Traverse Airflow (Velocity Pressure to CFM)
- Pitot Traverse Airflow from Point Readings (Velocity-Averaged)
- Product Pull-Down Load
- Product Pull-Down Time
- Proportional Balancing Ratio Method
- Pump Impeller Trim for a Balanced Flow
- Pump NPSH Available
- Pump Specific Speed and Impeller Type
- Pump Suction Specific Speed (Nss)
- Rack Power Density and Cooling Airflow
- Radiant Floor Heat Output
- Raised-Floor Tile Airflow and Plenum Pressure
- Recovery-Cylinder 80% Fill
- Refractory Lining Heat Loss, Interface Temperatures, and Shell Temperature
- Refrigerant Charge Weighing
- Refrigerant Leak Rate and the EPA Repair Threshold
- Refrigerant Line Size for Oil Return
- Refrigerant Line Velocity and Oil Return
- Refrigerant Mass Flow from Capacity and Refrigeration Effect
- Refrigerant P-T Chart
- Refrigerant Receiver Pump-Down Capacity
- Refrigerant Recovery Time and Phase Split
- Refrigerant Superheat / Subcooling (psig-psia toggle)
- Refrigerated Display Case Load and Internal Electric
- Refrigeration Compression Ratio
- Refrigeration COP and Carnot Limit
- Refrigeration Machinery Room Ventilation (ASHRAE 15)
- Refrigeration Pressure-Relief Discharge Capacity (ASHRAE 15)
- Residential Duct Leakage CFM25 (IECC Table R403.3.8)
- Rooftop Equipment Wind Uplift and Anchorage
- Round-to-Rectangular Duct Equivalent
- Run Capacitor Microfarad Check
- Saturated Steam Properties (Steam Table by Pressure)
- Secondary Coolant (Glycol) Loop Flow and Pump Penalty
- SEER and EER Conversion
- Sensible Heat Ratio
- Sensible Heat Ratio / Latent Split (ASHRAE)
- Server Inlet Temperature and Humidity Envelope
- Stack Effect Pressure and the Neutral Pressure Plane
- Static Pressure
- Superheat and Subcool
- Theoretical Chimney Draft
- Total External Static Pressure
- Trend Log Interval, Storage, and Controller Buffer Overrun
- Two-Stage Refrigeration Interstage Pressure
- TXV Capacity Correction and Valve Sizing
- Utility Bill Baseload and Weather-Sensitive Split (Energy Signature)
- Vacuum Decay (Blank-Off) Test
- Valve Actuator Close-Off Pressure and Torque
- Variable Primary Chilled Water Minimum Flow Bypass
- VAV Box Minimum and Maximum Airflow
- Vibration Isolation Efficiency (ASHRAE)
- Walk-In Cooler Heat Load
- Walk-In Cooler Outage Holdover and Dry Ice
- Wall Assembly R-Value
- Wall Condensation Plane Temperature vs Dew Point
- Wet-Bulb Sling Psychrometer
- Whole-Building Heat-Loss Coefficient UA
- Window Overhang Shading (Profile Angle and Shade Line)
- Window Solar Heat Gain and Conduction Cooling Load
- Zonal Pressure Diagnostics (Series Leakage Split for Attics and Crawlspaces)
Water Damage and Mold Restoration 57
- Abatement Waste Bulking, Bags, and Containers
- Air Mover Placement
- Air Sample Run Time and Volume
- Antimicrobial Mix and Coverage
- Asbestos / Lead Abatement Containment Take-Off
- Bound Water in Wet Materials
- Carpet / Cushion Restore-vs-Replace Decision (IICRC S500)
- Category 3 Loss Disposal Volume, Containers, and Routing
- Containment Air Balance
- Contents Pack-Out Volume, Boxes, and Storage
- Dehumidifier Sizing
- Desiccant Process-Airflow Sizing for Deep and Low-Temperature Drying
- Disinfectant / Antimicrobial Contact (Dwell) Time Reference
- Dry Standard vs Affected Reading
- Dry-Sponge Soot Cleaning Takeoff and Seal Coat
- Drying Chamber Air Turnover
- Drying Completion Projection (Days to Goal)
- Drying Goal
- Drying Log (IICRC S500 Boundary Test)
- Drying-Chamber Fresh-Air / CO2 Buildup
- Drying-Equipment Sensible Heat Load and Ventilation
- Drying-System Balance (Installed Dehu vs Evaporation Load)
- Equilibrium Moisture Content of Wood
- Equipment Power Draw vs Circuit Capacity
- Evaporation Load / Dehu Demand
- Field-Effective Dehumidifier Capacity at Chamber Grain Depression
- Fire-Exposed Wood Char Depth and Residual Capacity
- Flood-Cut Demolition Take-Off
- Flooded Basement Staged Pump-Down Schedule
- Hardwood Floor Drying-Mat System Sizing
- HEPA Scrubber Filter Life
- Hydroxyl Generator Sizing by Volume (IICRC S700)
- IICRC S520 Condition Reference
- Indoor/Outdoor Spore Ratio Clearance Screen
- Injection / Wall-Cavity Drying System Sizing
- Lead Dust Clearance Loading and Wipe Count
- Material Drying Times
- Moisture Removed by Grain Depression
- Mold Growth Conditions
- Mold Remediation Scope by Area
- Mold Surface Remediation Labor and HEPA Vacuuming
- Negative Air Machine Sizing
- Ozone Deodorization Sizing, Time, and Lockout
- PPE Selection
- Psychrometric Calculator
- Respirable Silica Exposure and Control Screen
- S500 Class-of-Loss Screen by Wetted-Surface Fraction
- Smoke Residue Type and Cleaning Method Screen
- Standing Water Volume
- Surface Condensation Risk and Dew-Point Margin
- Thermal Imager Delta-T Reference
- Thermal/ULV Fog Deodorizer Dosage
- Trapped Ceiling-Cavity Water Load and Collapse Screen
- Water Category Deterioration Over Time (IICRC S500)
- Water Extraction Volume, Time, and Waste-Tank Dumps
- Water Loss Class and Category
- Wicking-Height Flood Cut and Demolition Takeoff
Carpentry and Construction 642
- 100 mV Polarization Decay Criterion
- Abrasive Blast Air and Abrasive Consumption
- AC Induced Voltage and AC Corrosion Density
- Accessible Parking Space Count (2010 ADA Standards 208.2)
- Accessible Parking Space Geometry (2010 ADA Standards 502)
- Accessible Route Width, Pinch Points, and Passing Spaces (2010 ADA Standards 403.5)
- Accessible Shower Compartment Types (2010 ADA Standards 608.2)
- ADA Ramp Slope, Runs, and Landings (IBC 1012 / ADA)
- ADA Stair Treads and Risers (2010 ADA Standards 504)
- Adhesive-Anchor Epoxy Cartridge Volume
- Aggregate / Gravel Cubic Yards
- Aggregate Fineness Modulus (ASTM C136)
- Airless Spray Tip Size, Fan Width, Output, and Coverage Rate
- All-In Welding Cost per Foot
- Allowable Bearing Pressure for a Settlement Limit
- Allowable Building Area per Story (IBC Chapter 5)
- Allowable Load for a Settlement Limit (NC Clay)
- Anchor Bolt Embedment
- Annular Grout Volume for Cased Bore / Pipe-in-Casing
- Annular Velocity and Hole Cleaning
- Approximate Fundamental Period Ta (ASCE 7 §12.8.2.1)
- ASCE 7 ASD Load Combinations: Governing Demand and Net Uplift
- Asphalt Paver Speed and Production Rate
- Asphalt Spread Rate and Yield Check
- Asphalt Tack / Prime Coat Quantity
- Asphalt Tonnage
- At-Rest Earth Pressure on a Braced Wall (Jaky K0)
- Attached Canopy and Awning Wind Uplift and Snow Load
- Atterberg Plasticity Indices and A-Line Classification
- Attic Ventilation Net Free Area
- Bagged Concrete Count for a Small Pour
- Ballasted Roof Ballast Weight and Order
- Bar / Tube Stock Cut List Yield
- Basic Wind Speed from Velocity Pressure
- Beam Loading
- Beam-Column Nonsway Moment Amplifier B1 (AISC 360 App. 8)
- Beam-Column Sidesway Moment Amplifier B2 (AISC 360 App. 8)
- Bearing Length on a Wood Plate
- Belt Feeder Load, Pull and Power
- Belt Feeder Volumetric Capacity and Density Check
- Berthing Energy and Fender Selection
- Blast Airblast Overpressure and Confinement Screen
- Blast Hole Stemming Length and Flyrock Screen
- Blast Pattern Burden, Spacing, and Stiffness Ratio
- Blast Vibration Scaled Distance and Peak Particle Velocity
- Blasting Powder Factor and Explosive Load per Hole
- Bolt Combined Tension and Shear (AISC 360 J3.8)
- Bolt Shear + Bearing / Tearout Strength (AISC 360 J3)
- Bolt Torque to Clamp Load
- Braced-Wall-Panel Length (IRC R602.10)
- Brick and CMU Count
- Brick Veneer Anchor Spacing and Count (TMS 402 / IBC 1405)
- Brick Veneer Weep-Hole Count (IRC R703.8.6)
- Building Occupant Load from Area and Use (IBC Table 1004.4)
- Buried Flexible Pipe Deflection (Modified Iowa)
- Buried Pipe Flotation and Anti-Flotation Backfill
- Cantilever Beam Moment, Shear, and Deflection
- Cantilever Retaining Wall Stability (Overturning / Sliding / Bearing)
- Cantilever Sheet Pile Wall Penetration Depth
- Carbon Equivalent and Preheat Screen
- Carbon Monoxide Alarm Requirement and Count (IRC R311)
- Carburizing Case Depth and Time at Temperature
- Carpet Seam and Drop Layout
- Carpet Square-Yard and Linear-Foot Takeoff
- Cast-In Anchor Shear Concrete Breakout (ACI 318-19 17.7.2)
- Cast-In Anchor Tension Concrete Breakout (ACI 318-19 Ch. 17)
- Cathodic Protection Anode Count and Life
- Caulk / Sealant Cartridge Yield from Joint Size
- Cement Board (Tile Backer) Sheet and Screw Takeoff
- Chain-Link Fabric, Post, and Tension-Band Takeoff
- Changes in Level and Floor Surfaces (2010 ADA Standards 302, 303)
- Chimney Termination Height (IRC R1003.9, the 3-2-10 Rule)
- Chip Seal Design by the McLeod Method
- CIPP Liner Thickness for Groundwater Buckling (ASTM F1216)
- CIPP Liner Thickness, Fully Deteriorated Host (ASTM F1216)
- Close Interval Survey Planning
- Closet Rod and Shelf Takeoff
- CMU Grout Lift and Pour Height Limits
- CMU Grout Volume (Partial and Full Grout)
- Coating Breakdown Factor and CP Current Growth
- Coating Coverage from Volume-Solids and DFT
- Coefficient of Consolidation cv from Oedometer Curve
- Coil / Roll Stock Length
- Coke Breeze Backfill Quantity
- Cold-Planing (Milling) Production and RAP Tonnage
- Collapsed or Damaged Floor Load for Shoring
- Collector / Drag Strut Axial Force (ASCE 7 12.10)
- Column Alignment-Chart Stiffness Ratio G (from member EI/L)
- Column Base Plate under Axial Load (AISC Design Guide 1)
- Column Effective Length Factor K (Alignment Chart)
- Column Web Panel-Zone Shear (AISC 360 J10.6)
- Combined Axial and Bending Stress (P/A +/- Mc/I)
- Composite Beam Flexural Strength (AISC 360-22 I3)
- Composite Shear Stud Strength and Count (AISC 360-22 I8)
- Compound Circular Curve
- Compound Miter (Crown Molding)
- Compressed Gas Cylinder Storage Separation (OSHA 1926.350)
- Concrete Age-Strength Gain for Form Stripping (ACI 209)
- Concrete Anchor Pryout in Shear (ACI 318-19 17.7.3)
- Concrete Anchor Side-Face Blowout (ACI 318-19 17.6.4)
- Concrete Anchor Steel Strength (ACI 318-19 17.6.1 / 17.7.1)
- Concrete Anchor Tension-Shear Interaction (ACI 318-19 17.8)
- Concrete Bearing Strength (ACI 318-19 22.8)
- Concrete Boom Pump Reach and Setup Radius
- Concrete Control Joint Spacing
- Concrete Control-Joint Saw-Cut Footage
- Concrete Corbel / Bracket Design (ACI 318-19 16.5)
- Concrete Cracking Moment Mcr (ACI 318-19)
- Concrete Curing Compound Coverage
- Concrete Effective Moment of Inertia Ie (ACI 318-19 Bischoff)
- Concrete f'c from Modulus of Elasticity (ACI 318-19 19.2.2)
- Concrete f'c from Modulus of Rupture (ACI 318-19 19.2.3)
- Concrete Headed-Anchor Pullout (ACI 318-19 17.6.3)
- Concrete Immediate Deflection from Ie (ACI 318-19)
- Concrete Isolation-Joint Filler Takeoff
- Concrete Maturity and Equivalent Age (ASTM C1074)
- Concrete Mix Design (Simplified)
- Concrete Modulus of Elasticity Ec (ACI 318-19 19.2.2)
- Concrete Modulus of Rupture fr (ACI 318-19 19.2.3)
- Concrete Moisture Vapor Emission Rate from a Calcium Chloride Test (ASTM F1869)
- Concrete per Post Hole
- Concrete Pour Rate, Rate of Rise, and Delivery Cadence
- Concrete Pump Line Pressure and Reach Limit
- Concrete Section Depth for a Target Cracking Moment
- Concrete Stair / Stoop Volume Takeoff
- Concrete Surface Evaporation Rate and Plastic-Shrinkage Risk (ACI 305)
- Concrete Threshold and Cracking Torsion (ACI 318-19 22.7)
- Concrete Volume
- Concrete Washout Containment Volume
- Concrete Yield and Relative Yield (ASTM C138)
- Conical Stockpile Volume and Tonnage
- Consolidation Degree from Elapsed Time (Terzaghi)
- Consolidation Time Rate (Terzaghi)
- Construction Adhesive Tube Count
- Continuous Welded Rail Thermal Force and Neutral Temperature
- Corner Bead / Drywall Trim Takeoff
- Corroded Pipe Remaining Strength (ASME B31G)
- Coulomb Active Earth Pressure (Wall Friction and Batter)
- Crack-Control Bar Spacing (ACI 318-19 24.3.2)
- Crane Lift Plan Quick-Math
- Crawl Space (Under-Floor) Ventilation Net Free Area
- Crest Vertical Curve Length for SSD (AASHTO)
- Cross-Section Properties (A, I, S, r)
- Crusher Reduction Ratio and Circuit Stage Check
- Curb-and-Gutter Concrete Volume
- Curtain Wall Mullion Deflection and Required Stiffness
- Curve Deflection-Angle Stakeout
- Cutter Suction Dredge Production and Slurry Density
- Cuttings Slip Velocity and Transport Ratio (Moore)
- Debris Management Site Acreage and Volume Reduction
- Deck Beam and Post Sizing (IRC R507)
- Deck Board and Fastener Takeoff
- Deck Ledger Fastener Spacing (IRC R507.9)
- Deep Pile Axial Capacity in Clay (Alpha Method)
- Demolition Debris Weight
- Design Spectral Response Accelerations SDS / SD1 (ASCE 7-16 11.4)
- Diluted Weld Deposit Composition
- Direct-Analysis Stiffness Reduction tau_b (AISC 360 C2.3)
- Directional Bore Minimum Bend Radius and Entry Setback
- Dished Tank / Vessel Head Volume
- Door Clear Width, Thresholds, and Doors in Series (2010 ADA Standards 404.2)
- Door Closer Size, Opening Force, and Where the Overage Is
- Door Maneuvering Clearance, Front Approach (ADA 404.2.4.1)
- Door Undercut Free Area, Transfer Airflow, and Noise
- Doubly-Reinforced Concrete Beam Flexural Capacity (ACI 318-19)
- Doubly-Reinforced Cracked Moment of Inertia Icr (ACI 318-19)
- Dozer Ripper Loosening Production Rate
- Dozer Slot / Blade Production Rate
- Drilling Mud Weight and Hydrostatic Pressure
- Drinking Fountain Heights and Count (2010 ADA Standards 211, 602)
- Drone Flight GSD, Overlap, and Image Count
- Dryer Exhaust Duct Developed Length (IRC M1502.4.6)
- Drywall Screw Fastener Takeoff
- Drywall Sheet Count and Mud
- Duct Hanger Load and Count
- Duct Wrap / Liner Material Takeoff
- Dump Truck Governing Payload and Load Count
- Dust Collector Air-to-Cloth Ratio and Bag Derate
- Dust Deflagration Vent Area Screen (NFPA 68)
- Dust-Control Watering Volume and Truck Trips
- Earthwork Production Unit Cost
- Earthwork Volume (End-Area)
- Eave Ice-Barrier Membrane Courses and Rolls
- Eccentric Bolt Group in Shear (Elastic Vector Method)
- Eccentric Fillet Weld Group (Elastic Method)
- Eccentric Footing Bearing Pressure and Kern Check
- Egress Exit Count and Required Width (IBC 1005.3 / 1006.2)
- Egress Travel Distance, Common Path, and Dead-End Check (IBC Chapter 10)
- Egress Window (Emergency Escape Opening) Check
- Egress Window Well (IRC R319.4.1)
- Electrical Duct-Bank Concrete Encasement Volume
- Elevator Buffer Stroke and Impact Speed
- Elevator Counterweight Balance and Unbalanced Load
- Elevator Door Closing Kinetic Energy and Force
- Elevator Guide Rail Bracket Span, Stress, and Deflection
- Elevator Machine Room Heat Load and Cooling
- Elevator Overspeed Governor Tripping Speed Band
- Elevator Round-Trip Time, Interval, and Handling Capacity
- Elevator Suspension Rope Factor of Safety
- Elevator Traction Roping Ratio, Torque, and Rope Tension
- Embedded Post / Pole Depth for Lateral Load (IBC 1807.3)
- Equivalent Single Axle Loads (ESAL) Traffic Loading
- Erosion Blanket (RECP) Roll and Staple Takeoff
- Escalator Handling Capacity and Step Loading
- Escalator Step Chain Tension, Drive Power, and Brake Load
- Excavation Dewatering Pump Rate
- Excavation Protective System and Egress Triggers (OSHA Subpart P)
- Excavation Slope and Bench-Step Plan
- Excavation Volume
- Existing Roof Snow and Ice Weight Against Design Load
- Exterior Wall Opening Limit by Fire Separation Distance (IBC Table 705.10)
- FEMA Building and Contents Debris Estimate
- FEMA Flood Debris Impact Load
- Fence Material Takeoff
- Fillet Weld Size Limits and Effective Throat (AISC 360 J2.2b)
- Fillet Weld Strength and Size
- Fine Aggregate Grading Check (ASTM C33)
- Fire Door Clearance Check (NFPA 80 Annual Inspection)
- Fireplace Clearance to Combustibles and Mantel Projection (IRC R1001.11)
- Flammable Liquid Cabinet Storage (OSHA 1926.152(b))
- Flanged (T-Beam) Cracked Moment of Inertia Icr (ACI 318-19)
- Flat Glass Lite Weight
- Flat-Roof Snow Load
- Flat-Top (Truncated-Cone) Stockpile Volume and Tonnage
- Flexible Pavement Structural Number (AASHTO 93)
- Flood Hydrostatic and Hydrodynamic Load on a Wall
- Flood-Head Uplift on a Slab, Hatch, or Manhole Cover
- Floor Joist Notching and Boring Limits (IRC R502.8.1)
- Footing Area for Soil Bearing
- Formwork Pressure
- Formwork Shore Post Load and Spacing (ACI 347)
- Formwork Stud / Wale Maximum Spacing
- Formwork Tie Load and Spacing
- Foundation Drainage Board (Dimple Mat) Takeoff
- Foundation Drainage Grade Check (IRC R401.3)
- Foundation Waterproofing / Dampproofing Takeoff
- Frame Scaffold Material Takeoff
- Fresh Concrete Temperature (ACI 305.1)
- Friction (Koepe) Hoist Traction and Slip Limit
- Frost Penetration Depth (Stefan / Modified Berggren)
- Galvanized Duct Sheet-Metal Weight Takeoff
- Garage Door Torsion Spring Torque, Turns, and Rate
- Gas Pipeline Flow (Weymouth and Panhandle A)
- Glass Lite Wind Load, Deflection Limit, and Weight
- Glass Weight and Suction-Cup Lifter Count
- Glulam Volume Factor Cv (NDS 5.3.6)
- Grinding and Crushing Energy (Bond Work Index)
- Grinding Circuit Circulating Load (Two-Product Formula)
- Groove Weld Length for an Applied Load
- Groove Weld Strength
- Groundwater Seepage Velocity and Travel Time
- Guard and Handrail Code Check
- Guard Baluster / Picket Count (4-in Sphere Rule)
- Guard Post Load and Base Connection
- Gust-Effect Factor G (ASCE 7 §26.11)
- Gutter and Downspout Sizing
- Gutter LF and Downspout Count Takeoff
- Handrail Height, Grip, and Extensions (2010 ADA Standards 505)
- Hardness to Estimated Tensile Strength, and the Surface Trap
- Haul-Cycle Production and Fleet Match
- Haul-Road Total Resistance and Required Rimpull
- HDD Annular Pressure and Frac-Out Screen
- HDD Drilling Fluid Volume, Bentonite, and Spoil
- HDD Pullback Force First-Order Estimate
- Headed Bar Development Length (ACI 318-19 25.4.4)
- Heading Blast Fume Clearance Time and Air Changes
- Hearth Extension Size and Thickness (IRC R1001.10, R1001.9.2)
- Helical Pile Acceptance Torque for a Target Capacity
- Helical Pile Torque-to-Capacity
- Highwall Bench Width and Overall Slope Angle
- Hip / Ridge Cap Bundles and Roofing Nails by the Pound
- Hip / Valley / Jack Rafter Schedule
- Hoistway Smoke Venting and Pressurization Screen
- Horizontal Curve Layout
- Horizontal Sightline Offset on a Curve (AASHTO)
- Housewrap (WRB) Rolls, Cap Fasteners, and Seam Tape
- Hydraulic Elevator Jack Pressure, Flow, and Bore Change
- Hydroseed Slurry Mix and Tank Count
- Impressed Current Anode Bed Resistance
- Infinite Slope Critical Depth for a Target FS
- Infinite Slope Stability Factor of Safety
- Infinite Slope Stability with Seepage
- Instant-Off Potential and IR Drop
- Insulating Glass U-Factor and Interior Condensation Screen
- Insulation Batt Coverage and Count
- Intermittent Fillet Weld Schedule (AISC J2 / AWS)
- Internal Vibrator Spacing (ACI 309)
- Interpass Temperature Window and Time Between Passes
- Intersection Sight Triangle and Departure Distance
- Jobsite Material Stacking Limits (OSHA 1926.250)
- Joist / Deck Cantilever Ratio Check (IRC R507.6)
- Joist Hanger and Connector-Nail Count
- Joist Mid-Span Deflection
- Jominy Hardenability: How Deep the Hardness Reaches
- Key Bitting MACS and Adjacent Cut Check
- Kick Tolerance at the Casing Shoe
- Kitchen Cabinet Linear-Foot Takeoff
- Knee and Toe Clearance (2010 ADA Standards 306)
- Lag Screw Withdrawal Design Value (NDS 12.2.1)
- Lap / Panel Siding Squares and Linear Footage
- Lateral Earth Pressure and Thrust (Rankine)
- Lavatory Height and Bathtub Clearance (2010 ADA Standards 606, 607)
- Layout Squaring (3-4-5)
- LiDAR Point Density and Flight Line Spacing
- Light-Gauge Steel Stud and Track Takeoff
- Liquefaction Triggering Screening (Seed-Idriss CSR)
- Liquid Penetrant Dwell, Development, and Evaluation Window
- Liquid Pipeline Friction Loss and Pump Station Spacing
- Live Load Reduction (ASCE 7 Ch. 4)
- Local Scour Depth at a Bridge Pier
- Lock Backset, Bore, Stile, and Strike Layout
- Long-Term Deflection Multiplier (ACI 318-19 24.2.4)
- LTB Moment-Gradient Factor Cb (AISC 360 Eq. F1-1)
- Lumber Board Footage
- Lumber Spans
- Magnetic Particle Yoke, Coil Amperage, and Field Orientation
- Manufactured Home Diagonal Tie-Down Anchor Count
- Masonry Anchor Bolt in Shear (TMS 402 ASD)
- Masonry Anchor Embedment for a Tension (TMS 402 ASD)
- Masonry Cleaning Dilution, Coverage, and Rinse
- Masonry Compressive Strength f'm, Unit-Strength Method (TMS 602 Table 2)
- Masonry Control-Joint Layout
- Masonry Coursing and Course-Out Check
- Masonry Fireplace Flue Area (IRC R1003.15.1)
- Masonry Headed Anchor Bolt Tension (TMS 402 ASD)
- Masonry Horizontal Joint-Reinforcement Takeoff (IRC R606.12.2)
- Masonry Limited Access Zone and Bracing (OSHA 1926.706)
- Masonry Lintel Arching Load (Triangular Load Over an Opening)
- Masonry Lintel Bearing Length (TMS 402)
- Masonry Wall Dead Load
- Mass Concrete Adiabatic Temperature Rise Screen (ACI 207)
- Mass Haul Balance, Free Haul, and Overhaul
- Mast Climbing Work Platform Zone Load
- Master Key System Depth and Change Key Capacity
- Material Quantity
- Max One-Way Slab / Beam Span for a Given Depth (ACI 318-19)
- Max Temperature Change for a Stress Limit
- Mechanically Attached Single-Ply Fastener and Plate Takeoff
- Metal Roof Panels, Linear Feet, and Fasteners
- Metal Roof Thermal Movement and Sliding Clip Range
- Metal Weight by Shape and Alloy
- Mine Hoist Rope Factor of Safety and Depth Limit
- Minimum Flexural Reinforcement As,min (ACI 318-19 9.6.1.2)
- Minimum Plate Bend Radius
- Minimum Plumbing Fixtures by Occupancy (IBC Table 2902.1.1)
- Minimum Roof Snow Load (ASCE 7-22 7.3.3)
- Minimum Stirrups and the Section-Size Limit (ACI 318-19 9.6.3)
- Minimum Weld Preheat (CET Method)
- Mixed-Length Bar Nesting (Cutting Stock)
- Mononobe-Okabe Seismic Active Earth Pressure
- Mortar Batch Proportions by Volume (ASTM C270)
- Mortar Mix and Yield
- Multi-Bend Flat Pattern (Developed Length)
- MWFRS Wall Pressure (ASCE 7 Ch. 27)
- Nail and Screw Pull-Out
- Nail Lateral Design Value (NDS Yield Limit, Face- or Toe-Nailed)
- Nail Withdrawal Design Value (NDS 12.2.3)
- Natural Gas Compressibility Factor Z (Sutton, Wichert-Aziz, Dranchuk-Abou-Kassem)
- NFIP Flood Opening Area (44 CFR 60.3)
- NFIP Substantial Improvement 50% Rule (44 CFR 59.1)
- Non-Shrink Grout Volume Under a Base Plate
- One-Way Concrete Shear Without Stirrups (ACI 318-19 22.5.5.1)
- One-Way Slab / Beam Minimum Thickness for Deflection (ACI 318-19)
- OSHA Appendix C Timber Trench Shoring Lookup
- Oxy-Fuel Cutting Gas Consumption
- Paint Coverage
- Pallet Rack Base Plate Anchorage and Overturning
- Pallet Rack Beam Load and Deflection
- Panel-Zone Doubler-Plate Thickness (AISC 360 J10.6)
- Panel-Zone Shear Under High Column Axial (AISC 360 J10-10/J10-12)
- Panic Hardware Operating Force and What a Failure Points At
- Pavement Marking Paint and Glass Bead Quantity
- Paver Patio Takeoff
- Pile Driving Hammer Energy and Bearing Capacity
- Pile Embedment Length for a Target Capacity (Alpha Method)
- Pile Group Efficiency (Converse-Labarre)
- Pile Group Spacing for a Target Efficiency
- Pipe Bursting Displacement, Pull Load, and Heave Screen
- Pipeline CP Potential Attenuation
- Pipeline Maximum Allowable Operating Pressure (Barlow)
- Pipeline Pigging Volume, Velocity, and Batch Displacement
- Pit Dewatering Total Head, Staging, and Suction Limit
- Plywood and OSB Sheathing Span Rating
- Polymeric Paver Joint Sand Bag Count
- Portland-Cement Plaster (Stucco) Material Takeoff
- Post-Tension Tendon Elongation and Jacking Force
- Post-Weld Heat Treatment Holding Time and Ramp Rates
- Powered Attic Ventilator Sizing
- Press-Brake Air-Bend Tonnage
- Press-Brake Max Bendable Thickness
- Primary Consolidation Settlement (NC Clay)
- Primary Consolidation Settlement (Over-Consolidated Clay)
- Protruding Objects and Headroom (2010 ADA Standards 307)
- Prying Action in Tee and Angle Flanges (AISC Manual Part 9)
- Pulp Density and Percent Solids (Marcy Scale)
- Rack Storage Flue Space and Beam Length
- Rack Upright Frame Capacity and Unbraced Length
- Radiographic Exposure Time, Unsharpness, and Source Decay
- Radiography Restricted-Area Boundary Distance
- Rafter Length
- Rail Head Wear, Combined Limit, and Tonnage to Replacement
- Railroad Curve Superelevation, Unbalance, and Maximum Speed
- Railroad Degree of Curve, Radius, and Middle Ordinate
- Rain-on-Snow Surcharge (ASCE 7-22 7.10)
- Ramp Cross Slope, Width, and Edge Protection (2010 ADA Standards 405)
- Rankine Active Earth Pressure on a Cohesive (Clay) Backfill
- RC Column Longitudinal Steel for a Target Load
- RC Tied Column Axial Capacity (ACI 318-19 22.4)
- Reach Ranges for Outlets and Controls (2010 ADA Standards 308)
- Ready-Mix Concrete Order (Trucks, Waste, Short Load)
- Rebar Bend and Weight Schedule
- Rebar Chair / Bar-Support Count
- Rebar Compression Development Length (ACI 318-19 25.4.9)
- Rebar Lap-Splice Length
- Rebar Spacing and Quantity
- Rebar Tension Development Length (ACI 318-19)
- Rebar Tie-Wire Count and Weight
- Rebar Weight Takeoff
- Reinforced CMU Shear Wall In-Plane Shear (TMS 402 ASD)
- Reinforced CMU Wall Axial Compression (TMS 402 ASD)
- Reinforced CMU Wall Out-of-Plane Flexure (TMS 402 ASD)
- Reinforced Concrete Beam Flexural Capacity (ACI 318-19)
- Reinforced Concrete Beam Shear and Stirrup Spacing (ACI 318-19)
- Relative Compaction from Field Density and Proctor Maximum
- Relative Density (Density Index) of a Cohesionless Soil
- Required Moment of Inertia for a Deflection Limit
- Required Plastic Section Modulus for a Steel Beam
- Required SPT N60 for a Target Bearing (Meyerhof)
- Residential Framing Package
- Resilient / LVP Flooring Takeoff
- Restrained Thermal Stress and Force
- Restrained-Joint Length at a Pipe Bend
- Reverse (S) Curve Between Parallel Tangents
- Revolving Door and Turnstile Peak Throughput
- Rigid / Continuous Insulation Board Count
- Riprap Layer Volume and Tonnage
- Riprap Median Stone Size (Isbash)
- Rock Bolt Pattern Support Pressure and Dead-Weight Check
- Rock Check Dam Spacing
- Roll-Off Dumpster / Haul Count
- Roller Compaction Production Rate
- Roof Board Fastener and Plate Count by Zone
- Roof Drip Edge Rake / Eave Split and Piece Count
- Roof Pitch
- Roof Rain Load and Secondary-Drainage Flow (ASCE 7 Ch. 8)
- Roof Step-Flashing Piece Count
- Roof Underlayment Roll Count
- Roofing Nail Count by Wind Zone
- Roofing Squares and Bundles
- RTK Baseline Error Budget and Vertical Uncertainty
- RUSLE Annual Soil Loss
- Safe Curve Speed from Radius and Superelevation
- Safety Glazing Hazardous Location Check (IRC R324.4)
- Sag Vertical Curve Comfort and Drainage (AASHTO)
- Sag Vertical Curve Length for Headlight SSD (AASHTO)
- Scaffold Guardrail System Check (OSHA 1926.451(g)(4))
- Scaffold Mudsill Bearing Pressure and Sill Length
- Scaffold Per-Leg Load and OSHA 4:1 Check
- Scaffold Platform and Planking Check (OSHA 1926.451(b))
- Scaffold Tie Spacing and Height-to-Base Ratio
- Screen Efficiency (Two-Product Formula)
- Secondary Compression (Creep) Settlement
- Sediment Basin / Trap Storage Volume
- Segmental Retaining Wall Takeoff
- Seismic Base Shear (ASCE 7 §12.8 Equivalent Lateral Force)
- Seismic Design Story Drift and Allowable Limit (ASCE 7-22 12.8.6 / 12.12)
- Seismic Overturning Moment (ASCE 7 §12.8.5)
- Seismic Overturning Stability Ratio at the Foundation
- Seismic P-Delta Stability Coefficient (ASCE 7-22 12.8.7)
- Self-Leveling Underlayment Bag Count
- Shaft Torsional Shear Stress and Angle of Twist
- Shallow Foundation Bearing Capacity (Vesic)
- Shallow Foundation Elastic (Immediate) Settlement
- Shear Flow and Connector Spacing (Built-Up Beam)
- Shear Friction Across an Interface (ACI 318-19 22.9)
- Sheet Metal Bend Allowance
- Sheet-Metal Bend Springback
- Sheet-Metal Gauge to Decimal Thickness
- Shielding-Gas Cylinder Runtime and Cost
- Shop Speeds and Feeds
- Shotcrete / Gunite Order Quantity with Rebound
- Shower Pan Mortar Bed: Pre-Slope Thickness and Volume
- Shrinkage and Temperature Reinforcement (ACI 318-19 24.4)
- Siding Course Layout (Story Pole)
- Sign Character Height and Viewing Distance (2010 ADA Standards 703.5.5)
- Sill-Plate Anchor Bolt Count (IRC R403.1.6)
- Silt Fence Drainage-Area and Length Check
- Simple-Span Beam Reactions and Max Moment
- Single-Ply Membrane Roof Rolls and Seam Length
- Single-Shear Bolted / Dowel Lateral Design Value (NDS Yield-Limit Z)
- Skip Line Cycle Layout and Stripe Count
- Slab Load-Transfer Dowel Schedule (ACI 302)
- Slab Shoring and Reshoring Load Distribution
- Slender Column Moment Magnifier, Nonsway (ACI 318-19 6.6.4)
- Slide Gate Operator Force, Grade, and Duty Cycle
- Sliding Snow Load on a Lower Roof (ASCE 7 7.9)
- Slip-Critical Bolt Design Strength (AISC 360 J3.9)
- Slip-Critical Bolt with Applied Tension (AISC 360 J3.9)
- Slope-Stake Cut and Fill
- Sloped-Backfill Earth Pressure (Rankine Inclined Surface)
- Slurry Critical Velocity in a Discharge Line
- Smoke Alarm Count and Placement (IRC R310)
- Snow Drift Surcharge at a Roof Step or Parapet (ASCE 7 Ch. 7)
- Snow Guard / Retention Row Layout
- Soffit Vent and Ridge-Vent Count from Required NFA
- Soil Activity (Skempton)
- Soil Gradation Coefficients Cu / Cc (USCS, ASTM D2487)
- Soil Permeability (Hydraulic Conductivity from a Permeameter Test)
- Soil Phase Relations (Void Ratio, Porosity, Saturation)
- Soil Stabilization (Lime / Cement) Quantity
- Soil Swell / Shrinkage Volume Conversion
- Soil Vertical Total and Effective Stress (Terzaghi)
- Solid Shaft Diameter for an Allowable Torsion
- Speed Hump and Speed Table Geometry
- Spiral (Transition) Curve Layout
- Spray Fireproofing (SFRM) Material Takeoff
- Spray Foam Board-Feet and Set Count
- SPT Allowable Bearing on Sand (Meyerhof)
- Square Footage
- Square-to-Round Transition Development
- SRW Geogrid Layer Spacing and Layout
- Stabilized Construction Entrance Stone
- Staggered-Hole Net Width (AISC 360 B4.3b)
- Stair Calculator
- Stair Geometry Code Check (IBC 1011 / IRC R318)
- Stair Stringer Layout (with code check)
- Stair Stringer Length
- Stairway and Exterior-Door Landing Check
- Standard Hook Development Length (ACI 318-19 25.4.3)
- Standing Seam Metal Panel and Clip Takeoff
- Steel Beam Camber from Dead-Load Deflection
- Steel Beam Flexural Capacity (AISC 360 Ch. F, Compact + Braced)
- Steel Beam Lateral-Torsional Buckling (AISC 360 F2)
- Steel Beam Web Shear Capacity (AISC 360 Ch. G)
- Steel Beam-Column Combined Axial and Flexure (AISC 360 H1.1)
- Steel Block Shear Rupture (AISC 360 J4.3)
- Steel Column Compressive Capacity (AISC 360 Ch. E, Flexural Buckling)
- Steel Floor Walking Vibration (AISC DG11)
- Steel Roof / Floor Deck Sheet Takeoff
- Steel Tension Member: Yield and Rupture with Shear Lag (AISC 360 D2/D3)
- Steel Web Local Yielding and Crippling (AISC 360 J10)
- Stone Countertop Overhang Support Check
- Storm Safe Room Occupant Capacity
- Stormwater Water Quality Volume and Drawdown
- Stray Current Interference Bond Resistor
- Subgrade CBR to Aggregate Cover Thickness
- Submerged-Backfill Earth Pressure (Buoyant + Hydrostatic)
- Superelevation / Min Curve Radius (AASHTO)
- Surcharge Lateral Pressure on a Wall from a Line Load (Boussinesq)
- Suspended Acoustical Ceiling Grid Takeoff
- Suspended Scaffold Outrigger Counterweight
- T-Beam Effective Flange Width (ACI 318-19 6.3.2)
- T-Beam Flexural Capacity (ACI 318-19)
- Tactile Sign Mounting Height and Location (2010 ADA Standards 703.4)
- Tank Bottom Cathodic Protection Anode Layout
- Tapered Roof Insulation Average Thickness and Quantity
- Tempering Soak, Temper Embrittlement, and Secondary Hardening
- Temporary Stairway Check (OSHA 1926.1052)
- Thin-Set Mortar Coverage
- Thin-Wall Pressure Vessel Hoop and Longitudinal Stress
- Thin-Wall Vessel Max Allowable Working Pressure
- Tile Count and Grout Volume
- Tile Layout: Centering and Balanced Cuts
- Tile Substrate Flatness and Allowable Lippage (ANSI A108.02)
- Tilt-Up Panel Lifting Stress and Insert Layout
- Tilt-Up Panel Temporary Brace Load and Count
- Track Ballast Section Volume, Tonnage, and Surfacing Raise
- Track Cross-Level Deviation and Warp Against a Class Limit
- Trench Pipe Bedding and Backfill Take-Off
- Trench Spoil Pile Setback and Surcharge
- Trim Linear Footage and Miters
- Truss and Rafter Uplift Connector Demand
- Tube Bend Wall Thinning and Bend Ratio
- Turning Space and Clear Floor Space (2010 ADA Standards 304, 305)
- Turnout Frog Angle, Separation, and Clearance Point
- Two-Way Slab Punching Shear at a Column (ACI 318-19 22.6)
- Ultrasonic Thickness, Velocity, and the Calibration Trap
- Unbalanced Snow Load on Gable Roof (ASCE 7 7.6.1)
- Under-Slab Vapor Barrier Rolls and Seam Tape
- Underground Face Airflow, Velocity, and Diesel Dilution
- US&R Box Crib Capacity and Height Limit
- US&R Raker Shore Geometry and Wall Force
- US&R Vertical Shore Post Capacity
- USACE Hurricane Debris Estimating Model
- Utility Locate Depth Cross-Check and Distortion Screen
- Vacuum Excavation Spoil, Swell, and Tank Fills
- Valley Flashing Takeoff (Metal, Pieces, Ice Barrier)
- Velocity Pressure Exposure Coefficient Kz (ASCE 7-22 §26.10)
- Vertical Curve Elevations
- Vertical Distribution of Seismic Forces (ASCE 7 §12.8.3)
- Vibrating Screen Deck Capacity and Feed Check
- Wall / Roof Sheathing Panel and Nail Takeoff
- Wall and Ceiling Texture Material Takeoff
- Wall Stud Notching and Boring Limits (IRC R602.6)
- Wallcovering Roll Takeoff With Pattern Repeat
- Water Closet Location and Seat Height (2010 ADA Standards 604)
- Water to Reach Optimum Moisture for Compaction
- Water-Cementitious Ratio and Exposure Cap (ACI 318)
- Weld Cooling Time and the Thickness Transition
- Weld Deposit Weight, Filler, and Pass Count
- Weld Dilution Ratio
- Weld Passes and Arc Time to Fill a Groove
- Weld Preheat Energy and Fuel
- Weld Transverse Shrinkage and Pre-Set
- Weld Travel Speed for a Target Heat Input
- Weld Visual Acceptance: Cracks, Undersize, and Undercut
- Welded-Wire Reinforcement (Mesh) Sheet Takeoff
- Welder Duty Cycle
- Welding Heat Input
- Welding Rod and Wire Usage
- Well Casing and Annulus Cement Volume
- Well Control Kill Mud Weight and Circulating Pressure
- Well Decline Curve and Remaining Reserves
- Well Point Dewatering Spacing and Staging
- Wheel-Loader / Excavator Bucket Production Rate
- Wind Components and Cladding Pressure (ASCE 7 Ch. 30)
- Wind Force on Solid Freestanding Wall / Sign
- Wind Velocity Pressure
- Wind-Generated Wave Height from Fetch
- Window / Door Header Sizing (IRC R602.7)
- Window / Door Rough Opening Size
- Window Film Solar Heat Gain Reduction and Payback
- Windrow (Elongated) Stockpile Volume and Tonnage
- Wire Feed Speed for a Target Deposition Rate
- Wire Feed Speed to Deposition Rate
- Wood Beam Compression-Side End Notch Shear (NDS 3.4.3.2)
- Wood Beam-Column Interaction (NDS 3.9.2)
- Wood Bearing Perpendicular to Grain (NDS 3.10)
- Wood Bending Member (NDS Beam Stability Factor CL and Adjusted Fb')
- Wood Bending Member Shear (fv and the NDS Tension-Side End-Notch Reduction)
- Wood Bending Plus Axial Tension (NDS 3.9.1)
- Wood Column Capacity (Slenderness)
- Wood Connection Row and Group Tear-Out (NDS Appendix E)
- Wood Diaphragm Unit Shear and Chord Force (SDPWS)
- Wood Screw Withdrawal Design Value (NDS 12.2.2)
- Wood Shear Wall Deflection (SDPWS Eq 4.3-1)
- Wood Shear Wall Unit Shear and Holdown (SDPWS / ASD)
- Wood Structural Panel Opening Protection Takeoff
- Wood Tension Member Parallel to Grain (NDS 3.8)
- Work Zone Advance Warning Sign Spacing (MUTCD 6C-1)
- Work Zone Longitudinal Buffer Space and Activity Area Length (MUTCD 6B.06)
- Work-Zone Merging Taper Length and Device Count (MUTCD)
Fire-Ground Engineering 58
- Aerial Ladder Reach
- Confined Space Air Change Time
- Confined-Space Pre-Entry Ventilation (OSHA 1910.146)
- Drafting Maximum Lift (Altitude-Corrected)
- Dry-Pipe / Preaction Air Compressor CFM
- Elevation Pressure Loss / Gain
- Fall Arrest Anchorage and System Force Check (OSHA 1926.502(d))
- Fire Department Connection Supply Pressure
- Fire Hose Friction Loss
- Fire Pump Rated / Churn / Overload Curve Check (NFPA 20)
- Fire-Protection Water Tank Sizing
- Foam Concentrate
- Foam Eductor Back-Pressure / Hose-Lay Limit
- Hose Lay Section Count, Reach, and Charged Weight
- Hydrant Count and Spacing for a Required Fire Flow
- Hydrant Flow
- Hydrant Rated Flow at 20 psi (NFPA 291)
- Iowa Rate-of-Flow (Volume Method)
- ISO Needed Fire Flow
- Jockey (Pressure-Maintenance) Pump Sizing (NFPA 20)
- Ladder Pipe Reach
- Master Stream Reach
- Max Fire Area from Available Foam Concentrate
- Max Sprinkler Design Area for a Water Supply (NFPA 13)
- National Fire Academy Quick Fire-Flow
- NFPA 1142 Rural Water Supply
- Nozzle / Fire-Stream Reaction Force
- Portable Fire Extinguisher Coverage (NFPA 10)
- PPV Fan Sizing and Clearing Time
- Pump Discharge Pressure
- Radiant Exposure Separation Distance
- Relay Pumping Max Distance
- Required Fall-Arrest Clearance (ANSI Z359)
- Required Fire Flow
- Reverse-Lay Friction Loss
- Rope Rescue Mechanical Advantage
- SCBA Cylinder Work Time
- Sling Angle Load Multiplier
- Smoke Ejector / Ventilation CFM (NFPA 1500)
- Smoke Reading Reference
- Smooth-Bore Nozzle Flow (GPM)
- Smooth-Bore Tip Diameter for a Target Flow
- Spot Smoke / Heat Detector Count (Smooth Ceiling)
- Sprinkler GPM Density
- Sprinkler Head Count and Spacing (NFPA 13)
- Sprinkler K-Factor Solver
- Sprinkler Obstruction Clearance (Three Times Rule)
- Sprinkler Pressure Demand at the Base of Riser (NFPA 13)
- Sprinkler System Demand and Water Supply (NFPA 13)
- Stairwell Pressurization Airflow and Door Force
- Standpipe Friction Loss
- Standpipe Pump Discharge Pressure (NFPA 14)
- Tanker (Water Shuttle) Flow Capability
- Tanker Shuttle Cycle Time
- Tanker Shuttle Fill-Site-Limited Fleet Size
- Vacuum Gauge to Drafting Lift Readout
- Vehicle Braking Distance
- Water-Supply Duration
Cross-Trade Utilities 168
- Activated Carbon Adsorber Bed Life and Breakthrough
- Annulus (Ring) Area
- Arc Rise (Sagitta) from Radius and Chord
- Arc-Rated Clothing Selection From Incident Energy
- Baghouse Pressure Drop and Pulse Cleaning Interval
- Barrel / Cask Volume (Bulged Sides)
- Bearing Regrease Quantity and Interval
- Belt Conveyor Effective Tension and Drive Power
- Belt Drive Center Distance (for a Standard Belt)
- Belt Power from Tension and Speed
- Bolt Circle Layout
- Bolt Proof, Yield, and Tensile Load (SAE J429)
- Bucket Elevator Capacity, Speed, and Power
- Casting Pour Weight, Gating Yield, and Melt Energy
- Catchment Area for a Target Harvest
- Center of Gravity from Two Scales
- Circle Through Three Points
- Circular Arc Layout
- Circular Sector (Pie Slice) Area and Arc
- Circular Segment Area (from Chord and Rise)
- Coating VOC Content and Compliance Rate
- Commercial Laundry Washer Capacity and Turns per Day
- Cone Flat-Pattern Development (Radial Line)
- Cone-Bottom Tank Volume from Dipstick
- Confined Space Retrieval Winch Force
- Congregate Shelter Capacity and Sanitation
- Corrosion Rate from Coupon Weight Loss
- Cyclone Separator Cut Size and Pressure Drop
- Cylindrical Wedge (Ungula) Volume
- Daily Multi-Job Timesheet
- Day-Night Average Sound Level (Ldn and CNEL)
- Decimal to Fraction
- Deicing Salt Application Rate and Coverage per Load
- Dilution / Mixing Ratio
- Dilution Ventilation for a Solvent Vapour
- Dive No-Decompression Limit and Residual Nitrogen
- Dive Surface Air Consumption, Rock Bottom, and Gas Planning
- Downwind Ground-Level Concentration Screen (Gaussian)
- Dust Collection Duct Velocity, Diameter, and Branch Balance
- Electroplating and Anodizing Tank Current and Time
- Electrostatic Precipitator Collection Efficiency (Deutsch)
- Ellipse Area and Perimeter
- Ellipsoid Volume (Oblong / Oval Solid)
- Equal Spacing Layout
- Extension Ladder Overlap and True Working Height
- Extrusion Output Rate, Line Speed, and Draw-Down
- Fall Protection Clearance
- Fitting Take-Out Cut Length
- Fixed Ladder Fall Protection and Rest Platforms
- Flange Bolt-Up Torque
- Frustum (Truncated Cone) Volume and Surface
- Galvanic Corrosion and Area Ratio
- Galvanizing Kettle Cycle Throughput and Heat Limit
- Gas Spring Force and Mounting Geometry
- Gear Ratio and RPM Cascade
- Geometry Pack
- GPS Distance (Haversine)
- HDPE Butt Fusion Gauge Pressure and Drag
- Hearing Protector Attenuation (OSHA 1910.95 App. B)
- Heat Stress (WBGT and Heat Index)
- Heat-Treat Soak Time and Furnace Load
- Horizontal Lifeline Tension and Anchorage (OSHA 1926.502)
- Horizontal Tank Volume with Dished Heads (Dipstick)
- Hot-Dip Galvanized Coating Weight and Thickness
- Hydraulic Cylinder Force and Speed
- Hydraulic Reservoir Size and Cooler Heat Rejection
- Ice Melt Working Temperature and Melting Capacity
- Injection Mould Clamp Tonnage From Projected Area
- Injection Moulding Cooling Time From Wall Thickness
- Injection Shot Size, Barrel Capacity, and Residence Time
- Insulated Pipe Rack Spacing
- Interference for a Target Press-Fit Holding Force
- Interference Press-Fit Pressure and Holding Force (Lame)
- Interference Shrink-Fit Temperature
- Ladder Placement Angle
- Landfill Gas Flare Capacity and Destruction
- Laundry Water, Sewer, and Energy Cost per Pound
- Linear Interpolation
- Loan Payment
- Markup and Margin
- Material Cost Estimator
- Melt Furnace Energy per Heat and per Saleable Pound
- Mileage and Fuel Cost
- Moulded Part Shrinkage and the Cavity Dimension to Cut
- Moulding Sand Gas Evolution, Permeability, and Venting
- Multi-Piece Miter Elbow Layout
- NIOSH Lifting Equation
- Nitrox Equivalent Air Depth and the Oxygen Check
- Nitrox Maximum Operating Depth, Best Mix, and Oxygen Limits
- Noise Barrier Insertion Loss (Fresnel Number)
- Odour Dilution to Threshold and the Reduction a Target Requires
- OSHA 1910.95 Noise Dose and TWA
- OSHA Trench Sloping
- Oval (Obround) Tank Volume from Dipstick
- Overtime Hours
- Parabolic Segment Area and Arc Length
- Paraboloid of Revolution Volume
- Per-Diem (GSA)
- Permissible Residual Unbalance and Balance Grade
- Phosphate Conversion Coating Weight by Strip and Weigh
- Pipe Wraparound Template Ordinates
- Pitch Diameter from Three-Wire Measurement
- Plasma Cut Time, Consumable Life, and Cost per Part
- Pneumatic Cylinder Air Consumption (SCFM)
- Portable Ladder Setup Geometry (OSHA 1926.1053)
- Powder Coating Coverage, Transfer Efficiency, and Reclaim
- Pretreatment Bath Dragout and Counterflow Rinse Water
- Pulley System Mechanical Advantage
- Pump Total Dynamic Head (TDH)
- Punch / Shear Force
- Punch Capacity: Max Hole or Thickness
- Quench Severity, Biot Number, and the Agitation Screen
- Radiant Heat Exchange (Stefan-Boltzmann)
- Rainwater Harvesting Yield
- Ramp Slope (ADA)
- Recompression Chamber Gas Volume, Ventilation, and Duration
- Regular Polygon (Apothem, Across Flats/Corners, Area)
- Regular Polygon Miter and Layout
- Relief Supply Pallet Floor Load
- Respirator Cartridge Change Schedule
- Responder Base Camp Sanitation and Water
- Riser Feeding Distance (Steel Plate or Bar)
- Riser Modulus and the Feeding Volume Check
- Rolled Plate Blank Length
- Rolling Offset
- Sales Tax
- Salt Brine Batch Salinity, Salometer, and Freeze Point
- Silica Table 1 Respirator Lookup (OSHA 1926.1153)
- Sine Bar Angle Setup
- Slope from Digital Level
- Snow Storage Stacking Area and Haul-Off Trigger
- SPCC Secondary Containment Volume and Freeboard
- Spherical Cap / Dome / Partial-Fill Volume
- Spherical Zone (Segment of Two Bases) Volume
- Spray Booth Airflow and Makeup Air Load
- Stack Emission Rate and Potential to Emit
- Stack Plume Rise and Effective Stack Height (Briggs)
- Surface-Supplied Diver Air Supply Rate and Reserve
- Swing Fall Geometry (Pendulum Drop and Arc)
- Tank Volume (Dipstick)
- Tapered (Frustum) Tank Volume from Level
- Thermal Oxidizer Residence Time and Chamber Volume
- Thermoforming Draw Ratio and Wall Thinning
- Thread Pitch and Lead
- Three-Wire Thread Measurement
- Time and Materials
- Tip Out
- Tolerance Stack-Up: Worst-Case and RSS
- Torus (Doughnut) Volume and Surface Area
- Triangle Solver (Three Sides)
- Triangle Solver (Two Angles and the Included Side)
- Triangle Solver (Two Sides and a Non-Included Angle, the Ambiguous Case)
- Triangle Solver (Two Sides and the Included Angle)
- Truncated Pyramid (Rectangular Frustum) Volume
- Tumble Dryer Evaporation Load and Makeup Air
- Underwater Lift Bag Sizing
- Unit Converter
- Upgrade ROI / Payback
- USACE Emergency Earth Levee Section and Seepage Creep Check
- USACE Sandbag Levee Bags and Sand
- V-Belt Sheave and Drive Sizing
- Vehicle Load Distribution
- Visible Emission Opacity Six-Minute Average (Method 9)
- Walkway Clearing Crew Time and Service Window
- Wet Scrubber Liquid-to-Gas Ratio and Removal
- Wind Chill Exposure
- Wind Speed from Wind Chill and Temperature
- Worksite Toilet and Handwash Count
Knowledge References 15
- Defensible Space Reference
- Field First Aid Triage Quick-Read
- Hand Signal Reference
- Inspection Prep Checklist
- IRS Form Quick-Read Index
- Knot Reference
- Lab Safety Quick-Read (GHS + Spill)
- Lockout / Tagout Steps
- OSHA Recordkeeping Quick-Read
- OSHA Top-10 Citations
- State Sales Tax Nexus Quick-Read
- Storm Shelter Spec Reference
- Tool Maintenance Intervals
- Utility Locator and Emergency Contacts
- Wire / Pipe / Gas Color Codes
Trucking and Logistics 57
- Air Brake Pushrod Stroke and Out-of-Service Screen
- Axle-Load Tandem Slide
- Bridge Formula Minimum Axle Spread
- Cargo Securement Working-Load-Limit Check
- Collection Vehicle Payload and Compaction Ratio
- Deadhead Percentage and Effective Rate
- Detention Billing and Opportunity Cost
- Diesel Exhaust Fluid (DEF) Consumption and Range
- Dimensional Weight (DIM)
- Dock Door Count from Arrivals and Turn Time
- Dock Leveler Ramp Slope and Truck Bed Range
- Driver Pay: Cents-per-Mile vs Percentage
- Dynamic Hydroplaning Speed
- Federal Bridge Formula and Axle Weights
- FEMA Debris Load Ticket Eligible Cubic Yards
- Flatbed Tarp Coverage, Count, and Weight
- Freight Density and NMFC Class
- Fuel Surcharge per Mile
- Generator Fleet Fuel Resupply
- Gross Combination Weight Check
- HazMat Placarding Threshold Screen
- Hours of Service Math
- Idle Fuel Burn, Cost, and Engine-Hour Equivalent
- IFTA Per-Jurisdiction Fuel Tax
- Incoterms 2020 Decoder
- Invoice Factoring Cost and Effective APR
- Kingpin-to-Rear-Axle Compliance and Tandem Slide
- Locomotive Tonnage Rating on a Ruling Grade
- Low-Speed Off-Tracking (Swept Path)
- Maintenance Reserve per Mile
- Max Design Speed from Sight Distance
- Minimum Tiedown Count and Aggregate WLL
- Operating Cost Per Mile
- Order Pick Rate and Labour Standard
- Oversize and Overweight Permit Threshold Screen
- Pallet Cube and Trailer Loadout
- Per-Load Net Profit
- Plow Route Cycle Time, Accumulation, and Truck Count
- Points of Distribution Lanes, Types, Staff, and Footprint
- Railcar Curve Swing and Clearance Envelope
- Railcar Load Limit, Route Limit, and Cube
- Reefer Fuel Burn and Run Time
- Relief Commodity Demand and Truckloads
- Right-Angle Stacking Aisle Width
- Safe Downgrade Descent Speed and Brake Load
- Static Rollover Threshold
- Stopping Sight Distance (AASHTO)
- Storage Position Count and Cube Utilisation
- Swept-Path Width (Turn Lane Occupancy)
- Tire Load-Rating Check (per Axle)
- Trailer Deck Point Load and Dunnage Spread
- Trailer Tongue Weight and Sway Check
- Train Air Brake Reduction and Cylinder Pressure
- Train Resistance on Level Track (Davis Formulas)
- Transfer Station Throughput and Trailer Loadout
- Truck Startable Grade (Traction Limit)
- Waste Collection Route Time and Truck Count
Mechanic - Auto, Marine, Aviation 175
- 2K Paint Mix Ratio
- ABYC E-11 Marine DC Wire Sizing
- Acme (29-degree) Thread Depth and Dimensions
- Aerodynamic Drag Force and Power
- Air Compressor CFM and Duty Sizing From Tool Demand
- Air Receiver Pump-Up and Pump-Down Time
- Aircraft Control Cable Tension and Temperature Correction
- Aircraft Weight and Balance (CG Envelope)
- Alternator Charging Load Balance
- Anchor Rode Scope and Swing Radius
- Aviation Fuel Weight vs Temperature and Load Sheet
- Ballnose Feed-Direction Cusp and the Governing Finish
- Ballnose Milling Scallop Height from Stepover
- Band Brake / Capstan Torque
- Band Saw Blade Pitch, Speed, and Cut Time
- Barge Draft, Displacement, and Deck Load
- Battery Reserve Capacity to Amp-Hours
- Bolt Stretch and Clamp Load
- Boring Bar / Tool Overhang Deflection and L/D Limit
- Boring Bar Max Overhang for a Deflection Limit
- Brake Pad Lifespan and Heat Capacity
- Brake Pedal Ratio and Line Pressure
- Carburetor Jet Correction for Altitude and Temperature
- Centrifugal Force of a Rotating Mass
- Chamber Volume for a Target Compression Ratio
- Climb Gradient to Rate of Climb
- Clutch or Brake Engagement Energy and Heat
- Combined Fatigue Loading (Von Mises Alternating and Mean)
- Compressed Air Moisture and Condensate
- Cooling-System Coolant Flow for a Heat Load
- Coordinated Turn Radius and Rate
- Corrected Endurance Limit (Shigley Marin Factors)
- Counterbore Depth and Thread Engagement Left
- Countersink Diameter and Cutting Depth
- Countersink Diameter from a Plunge Depth
- Coupling Alignment Tolerance by Speed
- Crosswind and Headwind Component
- Crouch Planing-Speed Estimate
- Cumulative Fatigue Damage (Miner's Rule)
- Cut Time per Pass
- Cutter Diameter for a Spindle RPM
- Cutting Power and Spindle Torque
- Cutting-Fluid Concentration
- Density Altitude and Pressure Altitude
- Disk Clutch / Brake Friction Torque
- Displacement Hull Speed and Speed/Length Ratio
- Dividing-Head Simple Indexing
- Dock Piling Embedment and Lateral Load
- Dovetail Slide Measurement Over Rods
- Drill Point Angle from Tip Length
- Drill Point Depth
- Drill Speed, Feed, Power, and Torque
- Driveline U-Joint Operating Angle and Cancellation
- Driveshaft Critical Speed
- Driveshaft Max Length for an Operating Speed
- Dynamic Compression Ratio
- Eccentrically Loaded Column (Secant Formula)
- Engine BMEP (Brake Mean Effective Pressure)
- Engine Displacement and Compression Ratio
- Engine Fuel Burn from Horsepower (BSFC)
- Euler-Johnson Column Buckling
- Fatigue Notch Factor Kf (Notch Sensitivity)
- Feed for a Target Turned Finish
- Finite-Life Fatigue Strength and Life (S-N Line)
- Fluctuating-Stress Fatigue Safety Factor (Goodman/Soderberg/Gerber)
- Flywheel Kinetic Energy and Speed Fluctuation
- Free Surface Moment of a Slack Tank
- Free-Fall Drop Time, Impact Speed, and Energy
- Fuel Energy and Range
- Fuel Injector Size from Horsepower, BSFC, and Duty Cycle
- Gear Identification (Pitch from Teeth and OD)
- Gear Reducer Service Factor and Required Rating
- Gear Tooth Bending Stress (Lewis)
- Gear Tooth Contact Stress (Surface Durability)
- Gear Tooth Dynamic (Barth) Bending Stress
- Gear Undercut Minimum Teeth and Backlash
- Gear-Ratio MPH from RPM
- Gear-Tooth Chordal Thickness (Caliper)
- Glidepath Rate of Descent
- Grinding Wheel Surface Speed and Max Safe RPM
- Helical Compression Spring Rate
- Helical Spring Natural (Surge) Frequency
- Helical Torsion Spring Rate and Torque
- Horsepower for a Target Planing Speed
- Horsepower from Quarter-Mile ET
- Horsepower from Quarter-Mile Trap Speed
- Horsepower from Torque and RPM
- Hull Displacement and Block Coefficient
- Hydraulic Accumulator Usable Oil Volume
- Hydraulic Flow Limit from Drive Power
- Hydraulic Line Fluid Velocity and Minimum ID
- Hydraulic Motor Torque and Speed
- Hydraulic Pump Drive Horsepower
- Hydraulic Pump Output Flow
- Impact Load Factor (Falling / Suddenly Applied Load)
- Inclined Plane Push and Hold Force
- Injector Max Horsepower Capacity
- Injector Static Flow at a Different Rail Pressure
- Knurling Blank Diameter for Clean Tracking
- Machine Thermal Growth Offset for Cold Alignment
- Machining Speed and Feed
- Marine House Battery Load and Alternator Recharge
- Marine Prop Slip
- Marine Propeller Pitch Selection
- Marine Propeller Shaft Diameter for Torque
- Material Removal Rate
- Max Bearing Load for a Target L10 Life
- Max Boost Before a Charge-Air Temperature Limit
- Max Material Removal Rate from Spindle Power
- Max RPM from a Piston-Speed Limit
- Mean Piston Speed and RPM-Limit Reading
- Mooring Line Load from Wind and Current
- Plain (Sleeve) Bearing Pressure and PV
- Planetary (Epicyclic) Gear Ratio
- Power-Screw Torque, Efficiency, and Self-Locking
- Projectile Range, Height, and Flight Time
- Propeller Track, Balance, and Vibration Limit
- Rack and Pinion Travel, Speed, and Force
- Radial Chip Thinning Feed Compensation
- Reaming Prebore (Drill) Allowance
- Refrigerated and Desiccant Air Dryer Sizing
- Reverse-Dial Shaft Alignment Shim and Move
- Rigid Flange Coupling Torque Capacity
- Roller Chain Length in Pitches (ANSI B29.1)
- Roller Chain Wear Elongation Replacement Check
- Rolling-Bearing Dynamic Equivalent Load P (ISO 281)
- Rolling-Bearing L10 Rating Life (ISO 281)
- Rolling-Element Bearing Defect Frequencies
- Sacrificial Anode Service Life
- SAE J1349 Dyno Correction Factor
- Sailboat Performance Ratios (SA/D and DLR)
- Scotch-Yoke Simple Harmonic Motion
- Screw / Auger Conveyor Capacity
- Screw Conveyor Speed for a Target Capacity
- Shaft Alignment Offset and Angularity (Rim-and-Face)
- Shaft Critical Speed (Rayleigh Method)
- Shaft Key and Keyseat Size (ANSI B17.1)
- Single-Plane Field Balance Trial Weight
- Single-Point Thread Cutting Depth
- Slider-Crank Piston Position
- Soft-Foot Measurement and Correction Shim
- Spray Gun Transfer Efficiency and Material Usage
- Spring Wire Stress (Wahl), Solid Height, and Buckling
- Sprocket Pitch Diameter (ANSI B29.1)
- Spur Gear Tooth Geometry (Diametral Pitch)
- Structural Adhesive Bond Area and Shear Capacity
- Stub Acme (29-degree) Thread Depth and Dimensions
- Tailstock Setover for Taper Turning
- Tap Drill Size
- Taper Missing Diameter (Lathe Setup)
- Taper per Foot and Angle
- Taylor Tool-Life vs Cutting Speed
- Terminal Velocity (Aerodynamic Drag)
- Theoretical Surface Finish
- Thick-Wall Cylinder Stress (Lame)
- Tire Contact Patch from Load and Pressure
- Tire Size and Effective Gear Ratio
- Toggle Mechanism Clamping Force
- Torque Wrench Extension / Crowfoot Correction
- Travel-Lift Sling Placement and Hull Load
- True Airspeed from CAS and Density Altitude
- Turbocharger Pressure Ratio and Charge-Air Temp
- Universal Joint (Cardan) Speed Variation
- V-Belt Force-Deflection Tensioning
- Vacuum Pump Evacuation (Pump-Down) Time
- Valve Flow Coefficient (Cv)
- Vehicle Road-Load Force and Power
- Vessel Metacentric Height and Righting Arm
- Vibration Forcing Frequencies (1x, Blade Pass, Gear Mesh)
- Vibration Severity Zone (ISO 20816)
- Volumetric Efficiency and Airflow
- Waterline Length for a Target Hull Speed
- Wedge Splitting Force and Self-Locking
- Wheel Offset and Backspacing
- Worm and Worm-Wheel Geometry
Agriculture and Forestry 96
- Anhydrous Ammonia Rate from Target Nitrogen
- Available Water and MAD Irrigation Trigger
- Bandmill Blade Speed, Feed, and Bite per Tooth
- Basal Area per Acre (Prism Cruise)
- Brush Chip Volume and Haul Loads
- Bunker (Horizontal) Silo Forage Capacity
- Carcass Dressing Percentage and Freezer Yield
- Cattle Live Weight from Heart Girth
- Cattle Stocking Rate (AUM)
- Center-Pivot Application Depth and Runtime
- Center-Pivot Outer-Span Application Rate vs Soil Intake
- Center-Pivot Percent-Timer to Depth
- Chemical Application Rate (GPA)
- Clinometer Tree Height (Percent-Slope)
- Critical Root Zone Encroachment Percent
- Crop Yield and Harvest Loss
- Crown Reduction and Leaf Area Removed
- Downwind Spray Drift Buffer
- Drip Zone Flow and Valve Capacity
- Feed Conversion Ratio and Average Daily Gain
- Felling Notch and Hinge Geometry
- FEMA Hazardous Tree, Hanger, and Stump Screen with Extraction Volume
- Fertigation / Chemigation Injection Rate
- Firewood Cord Volume
- Friction-Device Hold Force by Wraps
- Grain Bin Capacity (Bushels)
- Grain Bin Wall Height for a Target Capacity
- Grain Drying Energy and Fuel
- Grain Drying Shrink and Net Bushels
- Green Log and Limb Weight
- Greenhouse CO2 Enrichment Rate and Cost
- Greenhouse Crop Transpiration and Water Use
- Greenhouse Fan and Pad Evaporative Cooling
- Greenhouse Natural Ventilation Vent Area
- Growing Degree Days
- Hay Dry-Matter and Safe-Storage Weight
- Hollow / Decayed Trunk Strength Loss
- Horticultural Fixture Count and Energy
- Irrigation Requirement (ET-based, acre-feet)
- Irrigation Sprinkler Uniformity
- Irrigation Zone Runtime and Cycle-and-Soak
- Kiln Charge Water Weight, Energy, and Vent Load
- Leaching Fraction and Runoff Conductivity
- Live Crown Removal Limit (Pruning Dose)
- Livestock Dry-Matter Intake and As-Fed Ration
- Livestock Water Requirement
- Log Truck Payload and Legal Load Volume
- Lumber Kiln Drying Time and Schedule Duration
- Manure Nutrient Application Rate
- Manure Storage Roof Savings (Covered vs Open)
- Minimum Sound Shell for an Allowable Trunk Strength Loss
- Mulch, Topsoil, and Aggregate Volume
- Nozzle Flow vs Pressure and Tip Selection
- NPK Fertilizer Blend from Soil Test
- Nutrient-Based Manure Application Rate
- Open-Cavity Trunk Strength Loss (Smiley & Fraedrich)
- Pearson-Square Feed Ration
- Pesticide REI / PHI Clock
- Pesticide Tank-Mix and Acres per Tank
- Photoperiod Blackout and Night Interruption
- Plant Spacing Count (Square and Triangular)
- Planting Density and Seed Rate
- Plug Tray Count and Seeding Quantity
- PPFD to Daily Light Integral
- Pre-Harvest Corn Yield (Yield Component Method)
- Quadratic Mean Diameter (from a Tally)
- Reference Evapotranspiration ET0 (Hargreaves / FAO-56)
- Reineke Stand Density Index
- Sawmill Overrun and Lumber Recovery Factor
- Sawmill Residue, Sawdust, and Chip Yield
- Shade Cloth Transmission and Solar Heat
- Sod Takeoff (Slabs and Pallets)
- Soil Bulk Density and Compaction
- Soil Volume Required for a Target Canopy
- Sprayer 1/128-Acre Calibration
- Sprayer Field Capacity and Spray Time
- Sprinkler Precipitation Rate
- Sprinkler Zone Flow for a Target Precip Rate
- Stored-Grain Aeration Fan Airflow
- Stump Grinding Volume, Chip Yield, and Backfill
- Substrate and Container Volume Takeoff
- Temperature-Humidity Index (Livestock)
- Thinning Target TPA From a Target SDI
- Timber Cruise (Doyle / Scribner / International 1/4)
- Tractor Ballast for a Target Weight-to-Power Ratio
- Tractor Drawbar Power
- Tractor Drawbar Pull from Power
- Tree Appraisal by the CTLA Trunk Formula
- Tree Cabling Placement and System Rating (ANSI A300)
- Tree Protection / Critical Root Zone
- Tree Rigging Shock (Dynamic) Load
- Tree Root Ball Diameter and Weight (ANSI Z60.1)
- Two-Stroke Fuel Mix
- Two-Stroke Mix Ratio Check
- Vapor Pressure Deficit at the Leaf
- Waste Storage Facility Volume (NRCS 313)
Water and Wastewater Operations 91
- Activated-Sludge Oxygen and Blower Air Demand
- Anaerobic Digester Volatile Solids Loading
- Backflow Assembly Test Pass Criteria
- BOD/TSS Mass Loading and Percent Removal
- Boil-Water Time and Boiling Point at Altitude
- Breakpoint Chlorination Dose
- Broad-Crested (Critical-Flow) Weir Discharge
- Chemical Metering-Pump Setting
- Chlorine Decay Constant from a Bottle Test
- Chlorine Demand and Dose for a Target Residual
- Chlorine Dose to Oxidize Iron and Manganese
- Chlorine Residual Decay (First-Order)
- Cipolletti (Trapezoidal) Weir Flow
- Cistern / Storage Reserve Days and Required Volume
- Clarifier Surface Area for a Target SOR
- Clarifier Surface, Weir, and Solids Loading
- Coagulant Dose from Jar Test
- Conductivity from Total Dissolved Solids
- Constant-Pressure Well VFD Setpoint and Speed
- Cooling Water Makeup (Cycles of Concentration)
- Dechlorination Chemical Dose
- Design Flow from Population (Average, Peak, Minimum)
- Detention Basin Volume for a Target Time
- Detention Time
- Digester Gas and Methane Production
- Digester Volatile-Acid to Alkalinity Ratio
- Discrete-Particle Settling Velocity (Stokes' Law)
- Disinfection Contact Time from a Baffling Factor
- Disinfection CT (USEPA SWTR)
- Emergency Drinking Water Bleach Dose
- Filter Area for a Target Loading Rate
- Filter Loading Rate and Backwash
- Float-Method (Velocity-Area) Open-Channel Flow
- Flow-Weighted Two-Source Water Blend
- Fluoride Feed Dose (Available Fluoride Ion)
- Gas Chlorine Cylinder Withdrawal Rate
- Gravity Oil/Water Separator Surface Area (API 421)
- Lab Dilution and Serial Dilution
- Landfill Airspace Consumption and In-Place Density
- Landfill Daily Cover Soil Volume
- Landfill Gas Generation (First-Order Decay)
- Landfill Working Face Cell and Lift Volume
- Langelier Saturation Index
- Leachate Generation from a Water Balance
- Lift Station Outage: Time to Overflow and Pump-and-Haul Loads
- Lift Station Wet-Well Volume and Cycle Time
- Mixing Velocity Gradient (G / Gt)
- Paddle Flocculator Power from Geometry
- Pool Calcium Hardness Increase (Calcium Chloride)
- Pool Cover Evaporation and Heat Loss Savings
- Pool Cyanuric Acid Dose
- Pool Evaporation Rate (ASHRAE / Carrier)
- Pool Free-Chlorine Dose by Product
- Pool Gunite Shell and Plaster Volume
- Pool Heat Pump Capacity vs Air, Water, and Humidity
- Pool Heater Output for a Target Heat-Up Time
- Pool Heater Sizing and Heat-Up Time
- Pool Pump Speed Reduction at Constant Turnover
- Pool Salt Dose
- Pool Total Alkalinity Adjustment
- Pool Turnover Rate and Chlorine Demand
- Pool Water Volume by Shape
- Pool Waterline Tile and Coping Perimeter Takeoff
- Population Equivalent (Organic Load)
- Pounds Formula
- Pump Wire-to-Water Efficiency
- Rainwater First-Flush Diversion Volume and Standpipe Length
- Recycling Diversion Rate and Residual Contamination
- Return Activated Sludge (RAS) Flow Rate
- RO Recovery, Concentrate Flow, and Concentration Factor
- Settleability-Based RAS Rate (from SVI)
- Sludge Volume Index (SVI)
- Sluice-Gate (Underflow) Free-Flow Discharge
- Solar Water Pump Array Sizing
- Spa Drain Interval and Refill Volume
- SRT and F/M Ratio
- Step-Drawdown Test and Well Efficiency
- Tapered Flocculation G Schedule
- Total Coliform Routine and Repeat Sample Count
- Total Dissolved Solids from Conductivity
- UV Dose and Target Check
- UV Required Intensity or Contact Time
- WAS Rate to Hold Target SRT (Sludge Age)
- Waste Settlement and Recovered Airspace
- Water Main Flushing Volume, Duration, and Velocity
- Water Pressure Zone HGL and Service Pressure
- Weir / Flume Open-Channel Flow
- Weir Head from a Target Flow
- Well Casing Storage, Purge Volume, and Disinfection
- Well Drawdown and Specific Capacity
- Well Sustainable Yield from Specific Capacity
Stage and Live Production 40
- Absorption Needed for a Target RT60
- Amplifier Power to SPL
- Audio Speaker Time Alignment
- Chain Hoist Lift Time, Power, and Duty Cycle
- Color-Temperature Correction in Mireds
- Counterweight Fly System Balance
- Decibel Converter
- Delay Loudspeaker Time and Haas Offset
- Distance for a Target SPL
- DMX-512 Address and Universe Planner
- Driver Spacing, Lobing, and Crossover Ceiling
- End-Fire and Cardioid Subwoofer Spacing
- Eyring Reverberation Time (RT60, High Absorption)
- Gobo Projected Image Size and Keystone
- Haze and Fog Machine Output for a Venue
- LED Tape Max Run Before the Far End Dims
- LED Tape PSU and Voltage-Drop Run
- LED Video Wall Build
- LED Wall Data Rate and Processor Ports
- Line Array Vertical Coverage and Splay
- Max Screen Size for a Projector
- Outdoor Stage and Banner Wind Load
- Partition Mass-Law Transmission Loss
- Potential / Needed Acoustic Gain (Feedback Stability)
- Power Distro Per-Leg Loading
- Projector Brightness and Throw
- RF Antenna Cable Loss and Amplifier Budget
- Rigging Capacity Quick Check
- Room Acoustics: RT60 and Axial Modes
- Speaker Impedance Network
- Speed of Sound in Air vs Temperature
- SPL and Inverse Square Law
- SPL with Atmospheric Absorption (ANSI S1.26)
- Stage Deck and Platform Live-Load Check
- Stage Lighting Beam and Throw
- Three-Phase Neutral Imbalance and Distro
- Throw Distance for a Target Beam Pool
- Truss Point Load and Span Capacity
- Two-Transmitter Intermodulation Screen
- Winch Drum Fleet Angle
Kitchen and Food Service 49
- 3-Compartment Sink Sanitizer Dilution
- Alcohol by Volume from Gravity
- As-Purchased Quantity from Edible Portion
- Baker's Percentage
- Beer Color SRM from the Malt Bill
- Beverage CO2 Cylinder Duration
- Beverage Pour Cost and Drink Price
- Brewery Packaging Yield and Loss
- Brewhouse Efficiency and Grain Bill
- Brine / Cure Concentration
- Carbonation Volumes and Head Pressure
- Cocktail ABV with Dilution
- Covers and Sales per Labor Hour
- Desired Dough Temperature (Mixing Water)
- Distillation Charge, Cut, and Proof Gallon Yield
- Dough Ball Weight from Thickness Factor
- Draft Beer Line Balancing
- Dry Hop Absorption and Beer Loss
- Fermentation and Proof Time vs Temperature
- Fermenter Glycol Cooling Load
- Food Safety Cooling Curve
- Freezing Time by Plank's Equation
- Fryer Oil Turnover, Life, and Annual Cost
- Grease Duct Buildup and Cleaning Interval (NFPA 96)
- Hop Bitterness IBU (Tinseth)
- Hot-Holding Load, Demand, and Kitchen Heat Gain
- Ice Cream Overrun
- Ice Machine Capacity and Bin Sizing
- Keg Yield, Pours, and Cost per Ounce
- Kettle Boil-Off Rate and Post-Boil Gravity
- Kitchen Exhaust and Makeup Air Balance Deficit
- Mash Strike Water Temperature and Thickness
- Mash Tun Capacity and Grain Bed Depth
- Menu Engineering Matrix
- Par Level and Order Quantity
- Period Food-Cost Percentage
- Plate Cost and Menu Pricing
- Recipe Scaling
- Refrigerated Thawing Time
- Restaurant Prime Cost
- Sous-Vide Pasteurization Time
- Sparge Water and Pre-Boil Volume
- Steam Kettle Heat-Up Time and Steam Demand
- Steam Table and Pan Conversion
- Time as a Public Health Control Window
- Walk-In Door Infiltration Load and Frost
- Warewasher Hot-Water Demand and Booster Sizing
- Yeast Pitch Rate and Cell Count
- Yield Percentage and Edible Portion
Field, Backcountry, and SAR 35
- Area by Coordinates
- Azimuth and Quadrant Bearing Conversion
- Backcountry Water and Caloric Requirement
- COGO Forward Locate (Bearing and Distance)
- COGO Inverse (Two Points to Bearing and Distance)
- Differential Leveling (HI Method) and Loop Misclosure
- Distance-Distance (Swing-Tie) Intersection
- Grade Rod, Cut, and Fill from One Setup
- Helicopter Landing Zone Size, Slope, and Approach
- Hiking Time (Naismith's Rule)
- Level-Loop Misclosure Distribution (Compass Rule)
- Leveling Curvature-and-Refraction Correction
- Lightning 30-30 Rule Countdown
- Litter Carry Team Size, Rotation, and Effort
- Magnetic Declination (WMM2025)
- Magnetic Declination and Bearing Conversion
- Map Scale: Distance, Area, and Representative Fraction
- Normal Tension for a Suspended Steel Tape
- Pacing and Distance
- Search Effort in Searcher-Hours
- Search Probability of Detection
- Search Track Spacing and Coverage
- Slope and Grade from Contour Lines
- Slope Angle and Avalanche Risk Window
- Slope Stake Catch Point on a Cross Slope
- Stadia Tacheometry (Distance and Elevation)
- State-Plane Grid-to-Ground Distance
- Steel Tape Distance Corrections (Temperature, Slope, Tension, Sag)
- Sunrise, Sunset, and Civil Twilight
- Sweat Rate and Fluid Replacement
- Sweep Width Correction (Weather, Speed, Fatigue)
- Total-Station Slope-to-Horizontal Reduction
- Traverse Closure and Adjustment
- Two-Bearing Resection
- UTM and Lat-Lon Conversion
Historical Reference Data 1
Accounting, Tax, and Small-Business 31
- Breakeven and Contribution Margin
- Cash Conversion Cycle
- Change Order Price with Overhead and Profit
- Declining-Balance Depreciation (Book)
- Economic Order Quantity (Wilson EOQ)
- Effective Annual Rate (APR to APY)
- Employer Payroll Tax
- Equipment Owning and Operating Hourly Rate
- Fully-Burdened Labor Rate
- Future Value of an Annuity (and Present Value)
- Home-Office Deduction (Simplified vs Actual)
- Inventory Turnover and DSI
- Loan Amortization Schedule
- MACRS Depreciation
- Markup vs. Margin Converter
- Mileage Log Roll-Up
- Overhead Recovery Rate
- Payroll Tax Withholding (Simplified)
- Prevailing-Wage Package: Cash vs Bona-Fide Fringe
- Quarterly Estimated Tax
- Reorder Point and Safety Stock (Service Level)
- Retainage Withheld and Net Payment (AIA G702/G703)
- Sales Tax Compounding and Reverse
- Section 179 and Bonus Depreciation
- Self-Employment Tax (Schedule SE)
- Straight-Line Depreciation
- Sum-of-the-Years'-Digits Depreciation (Book)
- Surety Bond Premium (Tiered Rate)
- Units-of-Production Depreciation
- Work-in-Progress Percent Complete and Over/Under Billing
- Workers-Comp Premium and Experience Mod
Bench Science and Laboratory Math 27
- Agarose Gel Percent
- Arrhenius Activation Energy (Rate vs Temperature)
- Beer-Lambert Concentration
- Cell Culture Doubling Time
- Centrifuge RPM and RCF
- CFU/mL Viable Plate Count
- Clausius-Clapeyron (Enthalpy of Vaporization)
- Hemocytometer Cell Count
- Henderson-Hasselbalch Buffer
- Ideal Gas Law (PV = nRT)
- Ligation Insert:Vector Molar Ratio
- Mass-to-Moles and Moles-to-Mass
- Michaelis-Menten Enzyme Kinetics
- Molarity and Dilution (C1V1=C2V2)
- Molarity from Concentrated Reagent
- Molecular Weight from Formula
- Nernst Equation (Cell Potential vs Concentration)
- Nucleic Acid Concentration (A260)
- OD600 to Cell Density
- Osmolarity and Osmotic Pressure (van't Hoff)
- PCR Master Mix
- Primer Melting Temperature
- Projected Cell Count from Doubling Time
- Resuspension Volume
- Serial Dilution Planner
- Substrate for a Target Fraction of Vmax (Michaelis-Menten Inverse)
- Van der Waals Real-Gas Pressure & Z Factor
Real Estate 35
- Blended Mortgage Rate (Two Loans)
- Break-Even Occupancy
- BRRRR Cash-Out Refinance and Capital Left In
- Cap Rate and DSCR
- Cash-on-Cash Return
- Closing-Cost Estimator (CFPB Line Items)
- Commission Split
- Cost of Waiting (Rate-Rise Scenario)
- Debt Yield
- Debt-to-Income (DTI)
- Depreciation Recapture on Sale
- FHFA / FHA / VA Loan Limits by County
- Fix-and-Flip Maximum Offer (70% Rule)
- Fix-and-Flip Profit and Return
- Floor Area Ratio (Zoning)
- Full Amortization Schedule
- Gross Rent Multiplier
- Home-Sale Capital-Gains Exclusion (§121)
- HUD Fair Market Rents
- IRC §1031 Exchange Timeline
- Loan-to-Value (LTV)
- Mortgage Discount-Point Break-Even
- Mortgage Reserves Requirement (Months PITI)
- Net Effective Rent (Lease Concessions)
- Per-Diem Prorated Interest at Closing
- PITI Mortgage Payment
- PMI Cancellation / Termination
- Property Tax Estimator
- Rent Roll to Effective Gross Income
- Rent vs Buy NPV Comparison
- Rentable/Usable Load Factor (BOMA)
- Rental Income / Expense Worksheet (Schedule E)
- Rental Total Return (Four Components)
- Required Face Rent from a Target Net Effective Rent
- Seller Net Proceeds Sheet
Educators and K-12 29
- Alternate Readability Formulas (SMOG / Coleman-Liau / Gunning Fog / ARI)
- Bell Curve / z-Score and Percentile
- Chi-Square Goodness-of-Fit
- Chi-Square Test of Independence (Contingency Table)
- Confidence Interval (Proportion or Mean)
- Final-Exam Grade Needed
- Genetic Codon Table (DNA / RNA)
- GPA Calculator (Weighted + Unweighted)
- Grade-Curve Scaler
- Lexile Band by Grade (CCSS Stretch)
- Linear Regression (slope, intercept, R^2)
- Number Base Converter (2-36)
- One-Sample t-Test (Mean vs Target)
- One-Way ANOVA (Compare 3+ Group Means)
- Paired (Dependent-Samples) t-Test
- Pearson Correlation (r, R^2, significance)
- Periodic Element Reference (Electronegativity / Configuration / Oxidation)
- Quadratic Formula and Discriminant
- Readability Scores (Flesch-Kincaid)
- Sample Size for a Target Margin of Error
- Scientific Notation and Significant Figures
- Significant Figures (count + round)
- Spearman Rank Correlation (rho)
- Standards-Based Grade (Mastery 1-4)
- Statistics Quick-Read
- System of Two Linear Equations
- Two-Proportion z-Test
- Two-Sample t-Test
- Weighted Category Grade
Rigging and Heavy Lift 34
- Beam Clamp Reaction and Side-Pull Check
- Block-and-Tackle Reeving Line Pull
- Center of Gravity and Pick-Point Load Share
- Chain / Lever Hoist Effort and Travel
- Crane Ground Bearing Pressure and Mat Size
- Crane Load Radius and Boom-Tip Height from Boom Geometry
- Crane Net Capacity After Deductions
- Crane Outrigger Reaction from Lift Geometry
- Crane Power Line Clearance (OSHA 1926.1408)
- Forklift Load-Center Capacity Derate
- Guy-Wire / Down-Guy Tension and Mast Download
- Lifting Lug / Padeye Pin-Hole Check
- Max Redirect Angle for a Block WLL
- Max Wind Speed Before a Load's Swing Limit
- Multi-Leg Sling Load per Leg
- Rigging Block Redirect Resultant Load
- Roller / Skate / Jacking Push Force
- Shackle / Eye-Bolt WLL and Angular Derate
- Spanned Cable Minimum Sag for a Tension Limit
- Spanned Cable Sag and Tension
- Spreader Bar vs Lifting Beam Below the Hook
- Spreader Beam Minimum Top-Point Height
- Steel Picket Anchor Lateral Capacity and Count
- Tag Line Pull and Handler Count
- Tandem (Two-Crane) Lift Load Share
- Three-Point Bridle Leg Tension (3-D)
- Two-Leg Bridle Leg Tension
- Winch Drum Line Pull by Layer
- Wind Force and Swing on a Suspended Load
- Wire Rope Elastic Stretch Under Load
- Wire-Rope Breaking-Strength Estimate and WLL
- Wire-Rope Clip Count and Spacing (OSHA Table H-2)
- Wire-Rope Diameter for a Required WLL
- Wire-Rope Sling D/d Bend Efficiency