Question: 1. Determine all reactions. The pin joint at E acts as a hinge.
2. The roof truss is bolted to a reinforced masonry pier at A and connected to an elastomeric pad at C. The pad, which can apply vertical restraint in either direction but no horizontal restraint, can be treated as a roller. The support at A can be treated as a pin. Compute the reactions at supports A and C produced by the wind load.