Remove the top section of an extension ladder and use the bottom section. The platform we ship interlocks with the bottom section (like the top section that was removed.) The bottom section is wide enough to accommodate a 440 OR 880 lb electric hoist motor.
(We recommend a 32 ft ladder - which will give you a 16 ft hoist. This is the best length for most houses. If you use a 20 ft hoist the materials may be to high above the roof for workers to easily remove the materials. For the easiest and safest access, the top of the ladder should be waist high when standing on the roof. If you need a few more feet it is possible to put the ladder in the back of a pickup or on a trailer. We often unload directly from a pickup or trailer to the hoist to minimize labor.)
The top rung will have to be cut off to make room for the cable pulley.
Install top bar with eye bolt down. Drill a 5/16 hole on each side and bolt using included lock nuts.
Next, bolt the straight 2x2 bar to the hoist MOTOR with the wide U-bolts that come packaged with the motor.
If the hoist is the 880 lb lift 2 5/16 holes for the U-bolts need to be drilled on EACH side to allow room for the hoist. Use the 5 inch rounded U-bolts we ship with the platform to determine where to drill the holes. Make sure the U-bolts go around the bottom rung of the ladder. (Note: If you are only going to use the hoist a few times you can put the U-bolts through a hole in the 2x2 flat bar and around the bottom rung of the ladder and avoid the drilling - but for extended use the U-bolts should go around the bar - not through it.)
Notice that if you use a 440 lb hoist they are smaller and there is enough space that you won't have to drill holes for the u-bolts.
Plug the hoist motor into a 110 outlet and let out enough cable to go over the top rung back down to the platform.
Attach the hoist pulley to the eyebolt. And test the setup to make sure the cable is free and clear.
Although we have never seen any of the lock bolts come out it's a very good idea to check them before each use. When raising the materials it is always wise to stand back and watch for problems.
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