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Construction Terms and Slang

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Jack Rafter
A rafter that spans the distance from the wall plate to a hip, or from a valley to a ridge.

Jamb
The side and head lining of a doorway, window, or other opening.

Joint
The space between the adjacent surfaces of two members or components joined and held together by nails, glue, cement, mortar, or other means.

Joint Cement
A powder that is usually mixed with water and used for joint treatment in gypsum-wallboard finish. Often called "spackle."

Joist
One of a series of parallel beams, usually 2 inches in thickness, used to support floor and ceiling loads, and supported in turn by larger beams, girders, or bearing walls.

Jemmy
(slang) A General Motors Corporation motor, engine, or truck. See also: jimmy.

Jimmy
(slang) A General Motors Corporation motor, engine, or truck. See also: jemmy.

Juice A Brick
(slang) To recharge a battery or other rechargeable.