Discussion on: Solution to Problem 123 Shear Stress

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Explanation please

For the Normal and Shear forces, just have a summation on the vert and hor axis. As for the area (shear area), you have to get the length (cos 20=100/L). Shear area= 50(100/cos20). Then subst to the compressive & shearing stress formulas. The smallest value of P is the safest.

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