I have a mid-rise scissor lift that's not quite long enough to pick up the jack points on some vehicles. Want to build some simple extensions I can set on top so I can pick up longer vehicles at the pinch welds. Figure I need roughly 6 inches more at each end overhanging (load center point would technically be a couple inches off the end but figure 6 inches anyway for worst case), 58 inches is the current platform length, so 70 inches total length of the extensions. Need to safely carry around 1500lbs at each end (lift is rated for 6000 lbs total, would build one for each side so 1500 x 4 = 6000). Would like to use roughly 1.5 inch square tube tripled up (3 side by side welded together). Can anyone do the math on it to figure out deflection and if I should use 0.100, 0.125, or 0.188 wall tube?
All the calcs I find online are always just center point load with ends supported.
High quality paint diagram:
All the calcs I find online are always just center point load with ends supported.
High quality paint diagram: