box tube strength
box tube strength
(OP)
Looking for the amount of weight for a 2x2x1/4 box tube 20' long vertical with a 3'x2x2x1/4 box extension on top and base is 12" 2x2x1/4 box with 6x6 gusset on 2 sides of top extension and base, noticed alot of flex in the tubing because of the length but was wandering how much would it hold before bending or breaking ??






RE: box tube strength
RE: box tube strength
I would be concerned with buckling more than bending as corus explained above. If you must use the same tube size, consider reducing its unsupported length/height.
Good luck.
RE: box tube strength
Anyway, if you are to use it, here;s a list of limit states whatI think you should check:
(1) Local Buckling of Plates in the tube, i.e. b/t ratio
(2) Overall Column Buckling