Decide on the area of the stage that the lights on the truss will illuminate. Select an optimal angle that will bathe the target area in light, ensuring at least a 6-foot distance out from the stage.
Check the durability of the ceiling hang points. Your most secure option will be built-in I-beams or eyehooks. Test your hang point with sandbags to guarantee a load capacity of 1,000 to 1,500 pounds. To install eyehooks, use a stud finder to find ceiling joists. Drill four holes in a straight line at 4-foot intervals; screw in the eyehooks by hand.
Attach high-grade chain to the corrugated steel pipe tightly at each end by wrapping the chain at least twice along the pipe. Begin with the end-link of the chain in your hand as you wrap, clipping the final link securely with a carabiner to the part of the chain that will be suspended. Lift each end of the pipe by the chain to ensure that the fastening is secure.
Repeat with two additional chains, wrapping each at 4-foot intervals along the pipe and fastening with two more carabiners.
Raise each end of the pipe simultaneously with the aid of two ladders or lift devices and suspend the end chains from the ceiling supports.
Experiment here with different heights to decide on the best hanging angle (45 degrees is generally best). If using eyehooks, connect carabiners directly to the desired link of chain. With an exposed I-beam, use the "wrap-and-connect" method that you used to fasten the chain to the pipe. Trim remaining slack with a grinding tool.
Repeat with the two inner chains until the truss is entirely level.
Hang lights to the truss by manually tightening the C-clamp attached to each lighting fixture.