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A groove cut in a board to receive another board.
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Coils of electricity, hot water or steam pipes embedded in floors, ceilings, or walls to heat rooms.
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One of a series of structural roof members spanning from an exterior wall to a center ridge beam or ridge board.
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Concrete strengthened with wire or metal bars.
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A thick longitudinal plank to which the ridge rafters of a roof are attached.
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The upright piece of a stair step, from tread to tread.
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Sheets, usually of plywood, which are nailed to the top edges of trusses or rafters to tie the roof together and support the roofing material.
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