| Term | Definition |
| Keenes cement |
A strong, crack-resistant gypsum plaster formulation.
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| Key |
A slot formed into a concrete surface for the purpose of interlocking with a subsequent pour of concrete; a slot at the edge of a precast member into which grout will be poured to lock it to an adjacent member; an interlocking of plaster with lath.
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| Kiln |
A furnace for firing clay or glass products; a heated chamber for seasoning wood.
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| Knee wall |
A short wall under the slope of a roof.
|
| Knife connection |
A steel beam/column connection in which the web of the beam is inserted from above between a pair of connection angles attached to the column.
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| kPa |
Kilopascal, a unit of pressure equal to 1 kilonewton per square meter.
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