Cantilever help

  • Thread starter Thread starter chase t
  • Start date Start date
Click For Summary

Discussion Overview

The discussion centers on the design and safety considerations for constructing cantilever extensions using galvanized steel. Participants explore the load-bearing requirements, potential risks, and structural integrity of the proposed setup.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant outlines the specifications for the cantilever extensions, including dimensions and load requirements.
  • Another participant raises concerns about the consequences of a system failure, questioning what would be supported by the cantilever and what is beneath it.
  • A later reply emphasizes the potential catastrophic nature of a failure, given that it would support a pool without any underlying structure.
  • Participants express skepticism about the appropriateness of the project, suggesting that a licensed structural engineer should be involved due to the significant loads and spans involved.
  • There is a request for a schematic of the system to better understand the analysis and design considerations.

Areas of Agreement / Disagreement

Participants generally express concern about the safety and legality of the proposed cantilever extensions, indicating a lack of consensus on whether the project should proceed without professional oversight.

Contextual Notes

Participants highlight the need for a licensed structural engineer's input and raise questions about the existing building's ability to support the additional load, suggesting that assumptions about structural capacity may be unverified.

chase t
Messages
2
Reaction score
0
TL;DR
Right size and type of Steel for cantilevers
I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
 
Engineering news on Phys.org
Welcome to PF.

What happens if this system fails? What is being held up by it? What is underneath it?
 
It would be catastrophic. A 3.5' deep 5'x7' pool. Nothing underneath it.
 
That doesn't sound like something we should be helping you with. What do your site engineer and your insurance agent say about the project?
 
What will the cantilevers be attached to?
I would question whether the existing building structure could carry that additional supported load.
 
  • Like
Likes   Reactions: berkeman
Let's see you analysis so far, starting with your schematic of the system.
 
A 17' span is pretty big too.

This sounds to me like something that's illegal to do without a licensed structural engineer. So I'm locking this, per our rules.
 
  • Like
  • Agree
Likes   Reactions: Bystander, Lnewqban and berkeman

Similar threads

  • · Replies 7 ·
Replies
7
Views
5K
  • · Replies 16 ·
Replies
16
Views
2K
Replies
33
Views
5K
Replies
19
Views
9K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 3 ·
Replies
3
Views
11K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
7K