$2\mathrm{.}2$ We are designing a truss to support a pedestrian walkway over a downtown

street. The live load displacement will be an important quantity to control so that

the glass remains weatherproof $($large displacements lead to gaps between the

glass panels and weather strips$).$ In preparation for calculating the live load

displacement, we need to determine which members are in tension, which are in

compression, and which are zero force.Prob. $2\mathrm{.}2$