Steel Tube Trapize Hanger Weight for 10'x4'x10' U-Shape

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Discussion Overview

The discussion revolves around the design and weight considerations for a trapeze-style hanger made from cold-formed steel tubing. Participants explore the structural integrity and load-bearing capacity of the proposed U-shaped design, which includes two vertical drops and a horizontal crossbar.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant seeks information on the hanging weight of a 10'x4'x10' U-shaped hanger made from 2"x2"x1/4" cold-formed steel tubing.
  • Another participant questions the dimensions and load capacity, noting that the bottom bar could carry a load of 6500 N, but emphasizes the need for more information about the vertical sides and connections.
  • A participant calculates the weight of the tubing, stating that 24 feet of Grade A500 2X2X1/4 tubing weighs 129.84 pounds.
  • Further clarification is provided regarding the application, indicating that the structure is intended for fall protection, which may require a higher load capacity than initially assumed.
  • One participant suggests either shortening the horizontal tube or increasing its cross-section to meet the necessary load requirements for safety.

Areas of Agreement / Disagreement

Participants express differing assumptions about the application and load requirements of the hanger, leading to multiple competing views on the necessary specifications for safety and structural integrity. The discussion remains unresolved regarding the optimal design parameters.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about static versus dynamic loading, the exact dimensions of the vertical sides, and the material properties of the connections, which are not fully defined.

Butch D
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I am looking to build a trapize style hanger that will be fabricated out of 2"x2"x1/4" cold formed steel tube 10'x4'x10' the shape is a U any idea where I can find the hanging weight of this type of hanger?
 
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Butch D: What is the second 10' dimension for? What is the distance between the vertical sides of the U? If the bottom bar of the U is 1220 mm long, it currently looks like the bottom bar itself could carry a load of 6500 N. However, we do not know how much load this hanger can carry, because we do not know what the vertical sides of the U, and all of the connections, are made of.
 
Grade A500 2X2X1/4 tubing weighs 5.41 pounds per foot, so 24 feet of it would weigh 129.84 pounds.
 
The hanging structure is in the shape of a U two 10 foot drops and a four foot piece across the bottom. Attached to the bottom is a connection for a lanyard for fall protection.
 
Butch D: In post 2, I was assuming you have a static loading. But now we see in post 4, you have a very different application than what I assumed in post 2. For your application, your square tube needs to be able to support a higher load than what is listed in post 2.

Therefore, if never more than one person is attached to your square tube, then it appears you would need to either decrease the length of your current horizontal square tube to 1090 mm long, or if you cannot shorten it, then it appears you would need to increase the horizontal square tube cross section size to, e.g., 57.15 x 57.15 x 6.35 mm.
 

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