The carpenter's and joiner's hand-book : containing a complete treatise on framing hip and valley roofs ... (1888)
Holly, H. W. (Henry Wells) · New York : John Wiley & Sons · leaf 23
thatthe down bevel is different on each jack,from the curve^ but the same from a straightline, from point to point of a whole rafter.* 10. A quick and easy way to find thelengths and hevels of common rafters. Suppose a building is 40 feet wide, andthe roof is to rise seven feet. Place yoursteel… … Fig. S. 11. The length of the rafter will be froma to 5, on the edge of the board. Always buya square with the inches on one side divided * Of courpe a convex roof is framed on the same plan. Thesame thing precisely, reversed. hand-book:. 19 into twelfths, then you have a convenientscale always at…
Carpentry
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