Steel square tubing center strength

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Discussion Overview

The discussion revolves around the strength and bending characteristics of steel square tubing when subjected to a central load. Participants are exploring the appropriate specifications for a kite buggy design, considering factors such as load capacity, material choice, and structural integrity.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant inquires about the orientation of the load on the tubing.
  • Another participant asks for clarification on the application and the inquirer’s background in Mechanical Engineering.
  • A participant expresses concern about the structural integrity of using 3" x 2" x 0.125 tubing given the dynamic load from a 350lb individual.
  • There is a suggestion to consider clamping the tubing with "U-bolts" to mitigate stress concentration under the seat.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the best tubing specification or the implications of the load orientation. Multiple viewpoints regarding the suitability of the proposed tubing sizes and potential solutions remain present.

Contextual Notes

Participants have not provided specific calculations or detailed assumptions regarding load distribution, material properties, or safety factors, which may affect the analysis.

Lqqkey
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Size O.D. Wall
3" x 2" x 0.1875
3" x 2" x 0.125
5ft long
center 500lb how much bend will there be
thank you for your time
 
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Which orientation to the load?
 
Lqqkey said:
Size O.D. Wall
3" x 2" x 0.1875
3" x 2" x 0.125
5ft long
center 500lb how much bend will there be
thank you for your time
Welcome to the PF. :smile:

What is the application? What is your background in Mechanical Engineering?
 
542828_269590596460074_1652734170_n.jpg

this is what i am looking to make its a kite buggy i am a big guy at 350lb
Size O.D. Wall
3" x 2" x 0.1875
3" x 2" x 0.125
5ft long
would like to know what steel square tubing would be best i am hoping i can use 3" x 2" x 0.125
 
That's a bit of a "stress riser" under the seat for that large a dynamic load; any way to simply clamp that with "U-bolts?"
 

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