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| jack raft·er (plural jack raft·ers) |
noun |
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| Definition: |
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U.K. short rafter used in hip roofs: each of a set of sloping timber beams spanning the area between the eaves and the hip rafter of a roof. Each jack rafter is of a different length to fit the changing dimension of the roof plane.
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| [<jack1 implying "small"] |
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