Shear and moment: two identical 20-mm thick plates are bolted to the top and bottom flange to form the built-up beam.
a) if the beam is subjected to a shear force of v = 250 kn, determine the allowable maximum spacing s of the bolts to the nearest mm. assume each bolt has a shear capacity of 30 kn, and i = 307.5e-6 m4 .
b) what is the mp (plastic moment) of the beam assuming bolts can take infinite shear and y = 250 mpa