(Solved): A pin-connected structure is supported and loaded as shown. Member ABCD is rigid and is horizontal ...

A pin-connected structure is supported and loaded as shown. Member ABCD is rigid and is horizontal before the load \( P \) is applied. Bars (1) and (2) are both made from steel \( [E=30,000 \mathrm{ksi}] \) and both have a cross-sectional area of \( 1.5 \) in. \( ^{2} \). Assume lengths of \( a=44 \) in., \( b=68 \) in., \( c=28 \) in., \( L_{1}=50 \mathrm{in} \)., and \( L_{2}=100 \mathrm{in} \). The normal stress in bars (1) and (2) must be limited to \( 40 \mathrm{ksi} \). Determine the maximum load \( \mathrm{P} \) that may be applied to the rigid bar. Answer in kips rounded-off to 2 decimal places.