Solution to Problem 110 Normal Stress

Problem 110
A 12-inches square steel bearing plate lies between an 8-inches diameter wooden post and a concrete footing as shown in Fig. P-110. Determine the maximum value of the load P if the stress in wood is limited to 1800 psi and that in concrete to 650 psi.
 

110-footing-wooden-post.gif

 

Solution 110

 
Benjamin_Molina

Question on both the FBD of wood and steel. How come it is presented in such a way that there is a load P on top of the object and each object has a corresponding P going up. I thought we are computing for the P on top of the objects? Kindly explain and thank you.

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