Stabilized Construction Entrance Stone
Cubic yards and tons of coarse stone for a stabilized construction entrance (track-out BMP).
Example
You enter
- Entrance length (ft) 50
- Entrance width (ft) 14
- Stone depth (in) 6
- Placed stone unit weight (pcf) 100
You get
- Pad volume 13.0 cy
- Stone to order 17.5 tons
No published worked example is on file for this calculation. It is checked against a hand-worked derivation of its method and an independent reference test.
Details, formula, and sources
Scopetons = length x width x depth x unit weight / 2000. The common 50 ft x 14 ft x 6 in pad is 13 cy (~17.5 tons) - the load on site before the first truck rolls out. The geotextile separator under the pad is taken off separately; the AHJ sets the size.
Formula or tablevolume_cy = length_ft x width_ft x (depth_in/12) / 27; tons = length_ft x width_ft x (depth_in/12) x unit_wt_pcf / 2000.
Source and editionPad take-off identity by name (length x width x depth x unit weight); first-principles volume arithmetic.
Free accessThe pad take-off is public quantity-survey geometry; the pad dimensions come from the general permit or AHJ.
What governsEstimate. AHJ and licensed professional govern.
API field nameslength_ft, width_ft, depth_in, unit_wt_pcf, volume_cy, tons
- Pad dimensions 50 ft x 14 ft x 6 in default (>= 50 ft long, full exit width); the general permit / AHJ governsconstruction general permit / AHJ
- Stone 1-4 in clean stone at ~100 pcf placed over a geotextile separator (taken off separately)erosion-control practice