Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 428
Fig. 13. Method of Finding Relative Height of Hip or Valley per Foot of Runto that of Common Rafter. the various pitches to the foot of run. For the ^-pitch roof, the figuresas shown, from 12 on tongue to 12 on blade, are those to be used onthe steel square for the common rafter; and for § pitch,… … Fig. 14. Diagram to Illustrate Use of Steel Square in Laying Out Timbersof Roofs of Equal Pitch. To understand this figure, it is necessary only to keep in mindthat the pitch of a roof is reckoned from the span. Since the run in eachpitch as shown is 12 inches, the span is two times 12 inches,…
Architecture · Building
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