Problem

The load carrying capacity of the frame of Prob. 4.1 1 can be increased by placing a count...

The load carrying capacity of the frame of Prob. 4.1 1 can be increased by placing a counterweight Q at point D as shown. The resultant moment about point A due to the cable forces and Q is not to exceed 20kN·m.

(a) Determine the largest value of counterweight Q. Hint: Let W = 0 and determine Q so that MA = 20kN-m.

(b) With the value of 0 determined in Part (a), determine the largest weight W that may be supported and the corresponding value of α.

Figure P4.12

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Solutions For Problems in Chapter 4

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