Building Overhead Hoist: Is 5"x5"x1/4" Wall Sufficient?

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Discussion Overview

The discussion revolves around the safety and adequacy of a proposed design for an overhead hoist being built in a shop. Participants are evaluating the structural integrity of using 5"x5"x1/4" wall thickness for the columns and the overall design considerations for spanning 20 feet with a 1/2 ton electric hoist.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant expresses concern about the safety of asking for design validation online, questioning the implications of having a child near the hoisted objects.
  • Another participant humorously questions the original poster's engineering background and the nature of their workshop.
  • Some participants assert that the thread is dangerous and suggest that those who seek validation for such designs may be unqualified.

Areas of Agreement / Disagreement

Participants generally express concern about the safety of the design and the qualifications of the original poster, indicating a lack of consensus on the adequacy of the proposed hoist design.

Contextual Notes

There are unresolved questions regarding the structural calculations and safety standards applicable to the design, as well as the assumptions made about the use of the hoist.

Gulfstream550
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TL;DR
Overhead hoist system
Hello, I am in the process of building an over head hoist in my shop.I've already taken delivery of the metal, so I hope I erred on the side of safety. I am spanning 20' and will be using a 1/2 ton electric hoist and trolly. I found a chart online from Harrington Crane Co. That specified that a W8x18.4 would be sufficient . What I couldn[t find was what I needed for support. That said, I am using 5"x5"x1/4" wall thickness for the columns. Am I safe??
 
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Um, you're posting on the Internet asking if your design is safe? What may be wrong with this picture? Will your 4 year old son be playing on the ground below the hoisted objects? :wink:
 
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berkeman said:
Um, you're posting on the Internet asking if your design is safe? What may be wrong with this picture? Will your 4 year old son be playing on the ground below the hoisted objects? :wink:

Dang, I'm sorry, didn't mean to post in the washing machine repair thread. Bad me:)
 
LOL. What is your design/engineering background? Is the shop your personal garage or your work shop?
 
This is a dangerous thread and should the terminated. Anyone who has to ask such questions is by definition unqualified to make the design.
 
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Dr.D said:
This is a dangerous thread and should the terminated. Anyone who has to ask such questions is by definition unqualified to make the design.
Done. Thank you for the second opinion, Doctor. :smile:
 

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