Question

Problem 1 A tie-down on the deck of a sailboat consists of a bent bar bolted at both ends, as shown in the figure. The diameter dg of the bar is 1/4 in., the diameter dw of the washers is 7/8 in., and the thickness t of the fiberglass deck is 3/8 in. If the allowable shear stress in the fiberglass is 300 psi, and the allowable bearing pressure between the washer and the fiberglass is 550 psi, what is the allowable load Pallow on the tie-down? de- U TE dw-

Answer 1

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ds=1 in dw = I in a fibe o kawy Allowable load fiber Glass Based upon shoot stress in Collow = 3oops i MPSE Shear Arca As T dot P1 = Zollow As = Tallow (dest) = (30ps:) T) en Cain - 309.316 61916 P,= Alloceable load based upon beating presure be 550psi Beasing area Apa I (do - de) 303.11b + P : 393.766 P = Goteb Allowable load Beasing Pressure governs Pallow = Gorebt