For informational purposes only! Work at your own risk! I use 2 simple pulleys and some elbow grease to lift some very awkward roof trusses. 16 feet wide and @12 feet tall. Rafters are made from 2 pressure treated. 2x6x10's,2 pt-2x6x8's and 3/4 inch pt. plywood gussets that are nailed,screwed and glued. A 2:1 pulling ratio is achieved.