I'm building a engine hoist in my garage using 2x4x1/4" steel tubing. How long of a span can i go that will support 500lbs center load?
A lot depends on how the tubing is going to be fixed at the ends and will it have to be moved around while supporting the load
But 10 ft would be about the limit assuming it was not to be moved while loaded and it was fixed so that no possibility of roll over or twisting could happen
Two words in the OP's post stand out the first is span the 2nd is center. To me this says he is either wanting to permanently fix a 2x4 tube beam or he is wanting to build a gantry style like shown in post #5
Had he said words like reach end or tip this would have meant to me he was thinking about those described in posts #4 & 6
JoBotha I'm afraid you may have dropped a zero. At any rate if one were to either construct a lifting device with either a 10 ft beam length fixed on both ends or one with a 6 ft total reach assuming it was supported on 1 end and the lifting point was at 5 ft, the total stress on the end would be close to double that of a gantry style where a 10 ft beam were used having the load centered on it
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