Concrete Pour Rate, Rate of Rise, and Delivery Cadence
The rate of rise (ft/hr) a placement rate produces in a given form footprint - the input formwork-pressure consumes - plus the pour duration and the ready-mix trucks-per-hour delivery cadence. Placing faster than the forms are designed for is how a blowout happens.
Formula and source
rate_of_rise_ft_hr = placement_rate_cyhr x 27 / form_plan_area_ft2; pour_hours = total_volume_cy / placement_rate_cyhr; trucks_per_hour = placement_rate_cyhr / truck_load_cy.
Rate-of-rise identity by name (volumetric placement rate over the form footprint); first-principles cubic-yard arithmetic; the rate of rise feeds ACI 347 formwork-pressure.
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