This is how we connect the hoist to the center of the truss.
Once the truss is lifted above the support beams (which the truss clears by one inch) one end is pulled over the beams. Gandalf stands on that side of the truss to hold it in place. He presses the lift button so the other end clears the support beams and I pulled the truss into place while he lowers the truss so it rests on the support beams.
Looking up at the truss restign on the edge of the support beams. Next we each get on top of a container and hook up a come-a-long and start dragging the truss into place.