Reshoring Calculator

Because the Grundy-Kabaila method spreads the new pour's total load across every interconnected level rather than dumping it all on the level directly below. More levels means more slabs sharing the load, so each individual reshore at each level carries less — reshore load per square foot is the new pour's total load divided by the number of levels, so going from one level to five levels divides the per-level reshore load by five (an 80% reduction), not merely by half.

ACI PRC-347-14(21), the American Concrete Institute's Guide to Formwork for Concrete, sets 50 psf as the minimum design construction live load for slab construction, and that's this calculator's default value. The input range itself is more permissive, though — it only enforces a 25 psf floor, so it doesn't stop you from entering a lower number if a project's structural engineer has established that a smaller construction load applies. Heavier construction activity — material staging, concrete buggies, or equipment on the deck — can justify a higher number than the 50 psf baseline.

No — number of levels is an input you set based on the building's actual shoring plan, not something the calculator solves for. A higher reshore capacity per post does change how far apart reshores can be spaced at whatever level count you choose, which in turn changes the reshore count, but it doesn't add or remove levels.

No. It's a planning-stage estimate using a simplified load-distribution method, useful for early scheduling and material budgeting. Actual reshore configurations, especially on irregular bays, cantilevers, or transfer slabs, need a stamped design from a structural engineer familiar with the specific framing and construction sequence.