Cyclopedia of architecture, carpentry, and building; a general reference work .. (1912)
American School (Lansing, Ill.) · Chicago, American school of correspondence · leaf 436
r. The square in this diagram isshown placed on the jack rafter timber with 12 on blade and 9 on 361 20 THE STEEL SQUARE tongue; then it is moved forward along the Hne of the blade to w.The blade, when in this latter position, will measure 18 inches. Thetongue will meet the edge of the timber at m,… … Fig. 30. Method of Finding Bevels for All Timbers in Roofs of Equal Pitch. 18 inches between centers in a roof having a pitch of 9 inches to thefoot of run. When jacks are placed between hips and valleys as shown at1, 2, 3, 4, etc., in Fig. 14, a better method of treatment is shown inFig. 29, where…
Architecture · Building
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