Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 195
persquaie foot of roof surface: Sheathing: Boards, 3 to 5. Shingling: Tin, 1; wood shingles, 2 to_3; iron, 1 to 3; slate, 10; tiles, 12 to 25. Rafters: 1.5 to 3. Purlins: Wood, 1 to 3; iron, 2 to 4. Snow Loads. The weight of the snow load that may haveto be borne depends, of course, on location. It… … (6) Fig. 16. which it blows to the direction of the wind. A horizontal windblowing at 90 miles per hour produces a pressure of about 40pounds per square foot on a surface perpendicular to the wind,while on surfaces inclined, the pressures are as follows: 10^ to the horizontal, 15 ])ounds per square…
Architecture · Building · Carpentry
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