Engineering, 05.12.2019 03:31 DoyleAK108

The beam is constructed from two boards fastened together at the top and bottom with three rows of nails spaced every 4 in. a compound beam is formed by two stacked boards of width 9 inches and thickness 3 inches. the boards are joined by rows of nails at intervals of 4 inches, and v is downward through the thicknesses. each nail can support a 560-lb shear force

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