Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 199
gainst a ridge board. This cut has been previouslyexplained. The rafter K L has a simple horizontal cut at the bottom likethat used on the common rafter, but at the top there are two cutssimilar to those at the foot of rafter I J. The rafter N T has twocuts at both top and bottom. All these bevels… … S 5 CARPENTRY 143 equal in length to a common rafter, and the length steadily decreasesas the distance of the rafter from its first full length rafter. Theexact difference in length between the first jack rafter and the next,is determined by finding how far apart the jack rafters are to beplaced,…
Architecture · Building
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