An A-frame lift, sometimes called a gantry, is used to hoist heavy machinery with minimal help. The lift earns its name as an A-frame because the crossbeam at the top is supported by four supports. The two supports on each side meet at the top and spread at the bottom, in the shape of a capital letter A. Another support is installed between the supports on each side for additional stability. A chain hoist hangs from a chain that's suspended across the crossbeam.
Weld three pieces of the ID steel together to create a bracket. One piece of pipe will jut out at a 90-degree angle from the corner to hold the crossbeam; the other two will angle down side-by-side to hold the supports. Repeat for the other side.
Attach the wheels to four of the OD pipes. Buy wheels that are designed to support at least 300 pounds and have brake locks, or plan on using blocks to hold them in place during construction and use.
Lay out the OD pipe with two lengths on each side of the crossbeam. Attach it to the bracket you created. Drill a hole through the bracket and into the crossbeam. Bolt the two pieces together. Repeat this assembly on the other end of the cross pipe. Hang the hoist from the crossbeam.
Invite a few friends over to help you stand the A-frame up. You can use additional steel to weld a cross support between each set of legs. If you do not weld the cross support in place and bolt it together instead, you can disassemble the frame later and move it to a different location as needed.
