Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 442
fs ofequal pitch the figure 12 on the blade, and whatever number of inchesthe roof rises to the foot run on the tongue, will give the plumb andheel cuts for the common rafter; and that by taking 17 on the bladeinstead of 12, and taking on the tongue the figure representing therise of the roof to… … 6 6 Fig. 36. Laying Out Timbers of Roof with Two Unequal Pitches. the back bevel for the jack to fit the hip or valley, and marking alongthe tongue will give the bevel to cut the roof-boards to fit the line ofhip or valley upon the roof. With this knowledge of what figures to use, and why they…
Architecture · Building
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