Problem 1:The inclined member AB of a timber truss is framed into a 4 x 6 -in. bottom chord, as shown in �gure. Determine the axial compressive forcein member AB when de average shearing stress parallel to the grainat the end of the bottom chord is 225 psi.

Problem 2:A rigid steel plate A is supported by three rods as shown in Figure. There is no strain in the rods before the load P is applied. After load P is applied, the axial strain in the rod DE is 800 µin/in. Determine:a. The axial strain in rods BCb. The axial strain in rods BC if there is a 0.006-in clearance in the connections between plate A and rod BC before the load is applied.

Problem 3:A pressurized circular cylinder has a sealed cover plate fastened with steel bolts (see �gure). The pressure p of the gas in the cylinder is 290 psi, the inside diameter D of the cylinder is 10.0 in., and the diameterdB of the bolts is 0.50 in. If the allowable tensile stress in the bolts is 10,000 psi, �nd the number n of bolts needed to fasten the cover.

Problem 4:A bar of rectangular cross section is subjected to an axial load P (see �gure). The bar has widthb _ 2.0 in. and thickness t _ 0.25 in. A hole of diameter d is drilled through the bar to providefor a pin support. The allowable tensile stress onthe net cross section of the bar is 20 ksi, and theallowable shear stress in the pin is 11.5 ksi. (a) Determine the pin diameter dm for which the load P will be a maximum.(b) Determine the corresponding value Pmax of the load.