Need help with determining thickness of steel bars

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    Steel Thickness
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Discussion Overview

The discussion revolves around determining the appropriate thickness of steel flat bars needed to support the weight of a scooter (160 lbs) on a lift designed for a wheelchair. Participants explore various factors affecting the structural integrity of the bars, including weight distribution, attachment methods, and potential bending under load.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Exploratory

Main Points Raised

  • One participant inquires about the necessary thickness of the steel bars, suggesting options of 1/4", 3/8", or other measurements to handle the scooter's weight without bending.
  • Another participant emphasizes the importance of understanding the attachment points and their potential to yield before the steel bars do.
  • A participant expresses concern about the bending of the bars, questioning whether using a thinner 3/16" bar would minimize bending while preventing breakage.
  • Some participants request additional details, such as diagrams or specifications of the lift and crossbars, to better understand the setup and provide accurate advice.
  • One participant shares personal experience with a custom trailer for transporting a scooter, suggesting considerations for load distribution and structural robustness.
  • Another participant humorously critiques the lack of clarity in the original question, highlighting the need for better documentation to avoid confusion.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the setup and requirements. There is no consensus on the appropriate thickness of the steel bars, and multiple viewpoints on the importance of attachment points and load distribution remain unresolved.

Contextual Notes

Participants mention the need for diagrams and additional specifications to clarify the discussion. There are concerns about the potential for bending and yielding of materials based on attachment methods and load conditions, but these aspects are not fully resolved.

  • #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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