King, Charles A. (Charles Albert), b. 1865 · New York, Cincinnati [etc.] American book company · leaf 104
ickness of the hip rafter at the angleof its intersection with the jack; upon a rectangular cornerD would = 2.823. H = lengthof the jack rafter. vd2 + c^ Formula 24. H = Vr^+A^ A method of ufeing the steel square to find the lengthsof the jack rafters or of roofs of any pitch or angle is… … 90 CONSTRUCTIVE CARPENTRY rafter vertical diagram a, b, c, scaled, upon the bevel board;slide the square back from the rise, ac, of the common rafterupon the base line, ab, the distance equal to J of Formula 25.JI will give the distance, less the length of the common rafter,which the jack rafter…
Carpentry
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