I'm building a lift, probably 1,000 $ max, but mostly 500 or less. Is there a chart that gives different structural configurations and their relative efficiencies?
i.e. .............. a bar joist design a pyramid with lifting point at the apex two poles with a right angle peak point of attachment and one horizontal purlin a plain truss shaped span, pitched to the roofing, with diagonal bracing ............16' wide span, verticals 8', then up with the framework. I actually need two so I can lift my boat entirely with straps. Weight of boat, about 1500#.
I have been googling, but no luck yet.
Material would be 3 x 3 x .120" tubing MIG welded together, and gusseted mostly wherever possible, and lateral bracing to help side loading.
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