Investigations of a Low Cost Roof for Small Farm Buildings

Cover Investigations of a Low Cost Roof for Small Farm Buildings
Investigations of a Low Cost Roof for Small Farm Buildings
Edwin Leroy Hansen
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9 29. 0 88 * Weight of fresh snow taken as 6. 25 pounds per cubic foot. Depth of snow measured perpendic- ular to roof.
b Based on velocity pressure on roof slope equal to 0. 77 q suction; values for height of 30 feet. For height of 20 feet, divide velocity given by 0. 95 to obtain equivalent velocity; for 10 feet, use 0. 84.
load q = = maximum velocity pressure v = 19. 8 = 22. 5 7959] A Low-CosT ROOF FOR SMALL FARM BUILDINGS 5 Conduct and Results of Tests Test 1 was made on a steel roof with a
... 12-foot span, made of 29 gage, 2 1 /2-inch corrugated sheets secured at the peak with a ! /4-inch bolt at each corrugation. When the average deflection at the quarter points was between 2!/2 and 3 inches, the roof load was 15. 9 pounds per square foot of. Horizontal projection (Table 2). This weight is equivalent to a fresh snow load of 29 inches.
One side of the roof was then unloaded, while the other side was left at full load (Fig. 5). The deflection of the fully loaded side changed very little, but that of the unloaded side was reduced to about % inch.


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