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Load Bearing Capacity of HSS Tube

Load Bearing Capacity of HSS Tube

Load Bearing Capacity of HSS Tube

(OP)
I've got a situation where I need to raise a 4 legged stand about 5". I am thinking of using 2" wide pieces of 5"x5"x1/4" HSS tube. Each leg of the stand would bolt through the top horizontal surface of the tube, and the tube would be secured to the floor at the bottom with a concrete lag. The stand weighs approx. 2500lbs. How can I determine if the tube is adequate to support this load ?

Thanks

Jeff

RE: Load Bearing Capacity of HSS Tube

AISC Chapter K provides information for concentrated loads on HSS walls. But I am not sure there is information for your specific condition.   

http://www.FerrellEngineering.com

RE: Load Bearing Capacity of HSS Tube

AISC 360, Chapter K of the spec deals with this problem.  You could also assume the max moment to be PL/4 (P=2500lbs/4, L=5") and assume the bending capacity of the tube wall to be Fy*Z, where Z=2"*.25^2/4 and Fy=yield strength of tube (usually 46ksi for HSS members).  The latter method is a conservative approach, but I don't think you'll have any problems making it calc out with the loads you are dealing with.

FranzR

RE: Load Bearing Capacity of HSS Tube

(OP)
Thank-you FranzR! Since I'm not a structural engineer, would you be able to explain the calc method and result ?

Thanks

Jeff  

RE: Load Bearing Capacity of HSS Tube

Can you provide a sketch?

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