Redesign the bottom of the machine legs of Problem to permit them to sit on a concrete floor and to satisfy the bearing stress requirements shown in Table 3–7. The concrete has a rated strength of 3 000 psi.
Problem:
The base of a special machine has four legs made from standard L3 × 3 × steel angles. Compute the bearing stress exerted by the legs on the floor if the total weight of the machine is 28 500 lb and the load is equally divided among the four legs.
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