Continuous cable ADB runs over a small frictionlesspulley at D to support beam OABC that is partof an entrance canopy for a building (see figure). Assumethat the canopy segment has a weight W =1700...

Continuous cable ADB runs over a small frictionless
pulley at D to support beam OABC that is part
of an entrance canopy for a building (see figure). Assume
that the canopy segment has a weight W =1700 lb.
(a) Find the required cross-sectional area of cable
ADB if the allowable stress is 18 ksi.
(b) Determine the required diameter of the pins at O,
A, B, and D if the allowable stress in shear is 12 ksi.