Cyclopedia of architecture, carpentry, and building; a general reference work .. (1912)
American School (Lansing, Ill.) · Chicago, American school of correspondence · leaf 187
; thusthe point P is determined. A little study of the figureswill suffice to reveal to anyonethe reason for this method of Fig. 195.procedure. Every time the squareis moved into a new position it has advanced 12 inches or 1 foot alongthe run of the rafter, since the distance D E is 12 inches and… … Fitting a Rafter against RidgeBoard
Architecture · Building
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