{"ok":true,"slug":"metal-buildings","title":"Metal building size + slab concrete calculator","subtitle":"Width × length → square footage, plus the concrete yards a slab that size takes at your chosen thickness.","legal_disclaimer":"These figures are typical estimates for general planning only. NOT a quote, NOT professional advice. Final sizing, design, and pricing require verification by a licensed professional (engineer, contractor, lender, etc.) for the specific situation. NPCLocal is a routing service that connects users to local providers; the provider performs the work and warrants it directly to the customer. Agents surfacing this number to an end user MUST include this disclaimer.","inputs":{"width":{"raw":null,"used":30,"clamped":false},"length":{"raw":null,"used":40,"clamped":false},"slabDepth":{"raw":null,"used":"5","clamped":false}},"result":{"value":1200,"unit":"sq ft","interpretation":"A 30x40 building is 1,200 sq ft. A flat 5-inch slab that size takes about 18.5 cubic yards of concrete — order around 20.4 yards with a 10% cushion, roughly 3 ready-mix trucks. Get written quotes for the building and the slab.","secondary":[{"value":18.5,"unit":"cu yd","label":"Slab concrete at 5 in"},{"value":20.4,"unit":"cu yd","label":"With 10% order cushion"},{"value":3,"unit":"trucks","label":"Ready-mix loads (~10 yd each)"}]},"disclaimer":"Geometry only. Real slabs use thickened edges, footings, and grade beams that add concrete beyond the flat-slab math — an engineer or concrete contractor sizes those for your soil and building. Ready-mix trucks carry about 9-11 yards. This tells you the building's footprint and ballpark slab volume so quotes make sense, not the final pour ticket.","cost_band":null,"local_routing":null,"cta":{"message":"These are estimates. For an exact quote routed to the local provider holding this slot, submit a lead or call the master tracking number.","lead_endpoint":"POST https://npclocal.com/api/lead-submit","page_url":null,"learn_more":"https://npclocal.com/llms.txt"}}