Solution to Problem 456 | Moving Loads

Problem 456
Three wheel loads roll as a unit across a 44-ft span. The loads are P1 = 4000 lb and P2 = 8000 lb separated by 9 ft, and P3 = 6000 lb at 18 ft from P2. Determine the maximum moment and maximum shear in the simply supported span.
 

Solution 456

Comments

Please explain why maximum shear happens when P1 is on the support

The maximum shear will happen when no load P will go outside the span and the resultant R is nearest the support.

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