Question

The beam is constructed from three boards. (Figure 1) The allowable shear stress for the wood is τallow=335 psi. Each nail can resist a shear force of 395 lb.

Part A

Determine the maximum loads P that it can support.

Express your answer to three significant figures and include appropriate units.

Part B

What is the maximum allowable spacing s of the nails used to hold the top flange to the web? (Consider only regions AC and BD.)

Express your answer to three significant figures and include appropriate units.

Part C

What is the maximum allowable spacing s of the nails used to hold the bottom flange to the web? (Consider only regions AC and BD.)

Express your answer to three significant figures and include appropriate units.

Answer 1