I recently made this gantry trailer for hauling things like Propane tanks Made out of 2-3/8 oilfield tubing with a 4" H beam for the gantry beam/ A 3500 lb electric winch and a boat winch that I widened and split the drum to pay out and take up the cable for moving the hoist winch. The hoist winch trolly is made out of 1/2" plate with 1-3/4" diameter cam rollers
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