Need help with determining thickness of steel bars

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    Steel Thickness
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The discussion centers on determining the appropriate thickness of steel flat bars needed to support a scooter weighing 160 lbs on a lift designed for wheelchairs. Participants emphasize the importance of understanding the weight distribution and attachment points to prevent structural failure. There is debate over whether to use 1/4", 3/8", or 3/16" thick bars, with concerns about bending and the potential for the attachment points to yield before the steel does. Suggestions include considering the load's dynamic effects during loading and unloading, as well as the possibility of using alternative materials like fabric to distribute weight more evenly. Clear diagrams and specifications are deemed necessary for accurate advice and design safety.
  • #31
I see no urgency to make a snap decision, since the OP has been gone for six weeks. We can leave all the possible solutions open. Others will find and read this thread, they deserve a range of rational solutions.

Ranger Mike said:
1/4" bar vs 3/8 bar. go with 1/4-inch bar and weld it
The limiting factor is tension, not deflection. It would be sufficient to go with 1/8" strap, wrap it over the arms and bolt it.
 

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