Caisson

Business / Construction / Caisson: A 10' or 12' diameter hole drilled into the earth and embedded into bedrock 3 - 4 feet. The structural support for a type of foundation wall, porch, patio, monopost, or other structure. Two or more 'sticks' of reinforcing bars (rebar) are inserted into and run the full length of the hole and concrete is poured into the caisson hole

Void

Business / Construction / Void: Cardboard rectangular boxes that are installed between the earth (between caissons) and the concrete foundation wall. Used when expansive soils are present. MORE

Pier

Business / Construction / Pier: A column of masonry, usually rectangular in horizontal cross section, used to support other structural members. Also see Caisson. MORE

Mushroom

Business / Construction / Mushroom: The unacceptable occurrence when the top of a caisson concrete pier spreads out and hardens to become wider than the foundation wall thickness. MORE

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