How much weight can aluminum square tube support? |

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I'm building a furniture level successful a campervan and trying to find what type of aluminum conduit to buy.

I'm reasoning to acquisition 6061-T6511 aluminum Square Tube pinch 1.5" width, 1.5" tallness and 0.125" wall thickness. Each conduit would beryllium 72" long.

My mobility is, really overmuch weight tin each of these support if fixed connected some ends? I utilized a beam bending calculator to find nan max displacement, but I'd besides for illustration to cognize nan weight capacity.

Any thief is appreciated.

My last creation would person 5 of these 72" agelong beams spaced astir 1 ft apart. A plywood furniture level would laic connected apical of these beams.

Beam bending calculator specs