Need help with determining thickness of steel bars

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    Steel Thickness
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SUMMARY

The discussion centers on determining the appropriate thickness of steel flat bars needed to support a 160 lbs scooter on a lift designed for wheelchairs. Participants emphasize the importance of understanding the weight distribution and attachment points to prevent bending or breaking of the bars. The consensus suggests that 1/4" thick steel bars are sufficient if properly welded to the frame, but considerations for load distribution and potential frame distortion are critical. Additionally, the use of 5/16" stainless steel screws with lock nuts is recommended for secure attachment.

PREREQUISITES
  • Understanding of load distribution principles
  • Knowledge of steel bar thickness and its impact on structural integrity
  • Familiarity with welding techniques for steel attachments
  • Experience with weight capacity ratings of lifting equipment
NEXT STEPS
  • Research the properties of 1/4" and 3/8" steel flat bars for load-bearing applications
  • Learn about proper welding techniques for securing steel bars to frames
  • Investigate load distribution methods to minimize frame distortion
  • Explore alternative materials, such as fabric mats, for load support
USEFUL FOR

Individuals involved in modifying or building scooter lifts, engineers focusing on structural integrity, and anyone responsible for ensuring safe transport of mobility devices.

  • #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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