Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 357
he radius of gyration about anaxis perpendicular to the longer legs is 1.10; and the allowable unit- 110 X 131stress is P= 24 000 = 10 900 pounds per square \^^ . . 21 440 inch, the length being 131 inches. TJie requn-ed area is TrTono = 1.97 square inches. Since this is less than the given area,… … Fig. 101. Detail of Knee-Brace andConnections. 290 ROOF TRUSSES 77 by the angles is 3.86 — 0.55 = 3.31 square inches, two |-inch rivet-holes being taken out. This shows the angles to be amply safe intension, and they will therefore be used for the section of the knee-braces. 25. Runway Girders. The…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
