For the built-up beam of Prob. 6.1, determine the allowable shear if the spacing between each pair of nails is s = 45 mm.
Prob. 6.1
Three full-size 50 X 100-mm boards are nailed together to form a beam that is subjected to a vertical shear of 1500 N. Knowing that the allowable shearing force in each nail is 400 N, determine the largest longitudinal spacing s that can be used between each pair of nails.