Calculate thickness of steel square tube

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Discussion Overview

The discussion revolves around determining the appropriate thickness of a 4X4 steel square tube for a welded structure designed to support a weight of 600 pounds. The scope includes considerations of structural integrity, stress, and deflection related to the design.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant suggests using basic beam formulas for stress and deflection, emphasizing the importance of establishing limits based on the loading style.
  • Another participant believes the original poster is seeking a specific thickness value rather than a method for calculation, requesting additional information about the structure's dimensions.
  • A later reply provides specific dimensions, stating the distance between the top two square tubes is 397 mm and mentions a 10 mm thick plate placed over the tube.
  • One participant proposes that a thickness of 3 mm is sufficient, citing the use of galvanized steel with a yield strength of 200 GPa as part of their reasoning.

Areas of Agreement / Disagreement

Participants express differing views on whether to provide a specific thickness or to discuss methods of calculation. There is no consensus on the exact thickness required, as opinions vary based on assumptions about material properties and structural design.

Contextual Notes

Limitations include the need for more detailed information about loading conditions, distances between structural elements, and the specific design requirements that may affect the choice of tube thickness.

Who May Find This Useful

Individuals involved in structural engineering, welding design, or those interested in the mechanics of materials may find this discussion relevant.

manu_vmv
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I want to design a welded structure steel stand to hold the weight of 600 pounds, by using 4X4 square tube. Please help me to find the thickness of steel tube.
 

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Use basic beam formulas for stress and deflection based on your loading style. Establish limits on these.

The thickness of the beam will increase the section modulus and decrease the stress and deflection. Choose a thickness to meet your stress and deflection limits.
 
I think he is asking to calculate him the value, not the way he will solve it.

If it is so, you must give us some more info, like the distance between those two square tubes (36.2) on the top, and the dimensions and distances of the ribs.

That's all I can think for now.
 
Thanks for the reply.
The distance between top two square tube is 397 mm(ceter to center). A plate 10 mm thick is place over the tube. So the entire weight is acted on the plate.
 
3mm thick is enough. I considered it by using galvanized steel with yield strength of 200GPa
 

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