Simple to build, the two punched plates were done by the local metal supply with their iron worker so they're fractionally oversized holes, makes using a spud to get lined up easy. The two side legs of the truss are straight and leaned in, then the three are trussed at 3' intervals the frame is about 12' tall.Ī punched plate is butted to the beam, then a matching plate is gusseted to the pipe top as another butt fit. The outer, centerline pipe is bent to be vertical below the bend when the frame is up. The top beam 5-6' is a rem that was cheap, the capacity for light loads like the feather wt cabin shown wasn't/isn't an issue. I used 1-1/2" ERW black pipe and just trussed the A frame ends. Not that it would pick a Lincoln 300 Diesel on a skid(!!) but the idea does make for a three piece frame that is pretty easy to stack up or down and handle the parts (once down) by your self. My homemade gantry post is only to give you ideas, not to suggest this gantry is 10' wide- its only 9' at the base. They have done all the engineering on things like this, and you can use their experience to help you with a project of this sort. Many guys have looked at factory specs from places like Wallace Cranes to get an idea for sizing of members.
Homemade crane lift plus#
Lifting devises usually have a serious safety factor built in, plus you do not want the beam to bend and have the trolley want to tend to roll to the center of the beam. Taller beams are almost always more resistant to deflection and bending than shorter beams of the same weight. You will want to oversize your main beam. Type in Weldingweb and gantry crane and it will probably pull up plenty of posts for you to look at. Google is a lot better than the site search engine here. There have been a number of different ones posted up here in the past by various members. Anything that lifts something heavy that can fail and seriously hurt someone isn't a learning project or a design by the seat of your pants type item. You may find you need to rig up some sort of setup so that you can wheel it to where you want to use it, then take the wheels off for use. Off road on soft ground does tend to say some sort of wide tire. Even rigid rubber wheels can take a set under heavy loads over time. They tend to squat under load and get hard to roll and I'd hate to have one fail with a load on. Pneumatic casters are probably not the way you really want to go.
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