1.7-1 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 dB of the bar is 6 mm, the diameter dw of the washers is 22 mm, and the thickness t of the fiberglass deck is 10 mm. If the allowable shear stress in the fiberglass is 2.1 MPa, and the allowable bearing pressure between the washer and the fiberglass is 3.8 MPa, what is the allowable load Pallow on the tie-down? dB P |dw| dw→ dB