Problem 5.1 For the frame and loading shown, the shear strength of the pins is fail=350MPa. Using a factor of safety FS=2.5 against shear failure of the pins, calculate the required pin diameters to the nearest mm at E, C, B, and A. The pins at A and E are in double-shear and those at C and B are in single- shear. Treat the connection at D as pinned. 4 kN m 1.5 m 45° E B A 1.5 m 1.5 m