Every Type of Foundation Explained

Every building on Earth is held up by something you'll never see. From a thin concrete slab to a caisson drilled deeper than a house is tall — these are the 7 foundations that carry everything we build, and how engineers choose between them. We break down all seven: slab-on-grade, strip footing, spread footing, pier and beam, raft, pile, and caisson — what each one does, and the soil and loads that decide which one a building gets. 00:00 Slab-on-Grade (the thinnest) 01:20 Strip Footing (under every wall) 02:46 Spread Footing (under a single column) 04:11 Pier & Beam (lifts the house up) 05:45 Raft Foundation (one giant slab) 07:40 Pile Foundation (driven down deep) 09:46 Caisson (the deepest) Foundations are the part of construction nobody photographs and nobody thinks about — poured first, buried before the building exists, then trusted for a century. You'll never see the one under your own home. You're only ever standing on the proof that it held. 🔔 Subscribe for more construction breakdowns:    / @constructiondude   #Foundations #Construction #CivilEngineering #StructuralEngineering #ConstructionDude