Making it safe by failing

  • Thread starter BMX56
  • Start date
  • #1
1
0
Hi,

I'm building a filming system that uses two parallel cables to support a mobile camera system.
The cable supports need to fail in bending to reduce the load on the cables.

The supports are a mild steel strap, section dimensions 35mm x 5.5mm, distance between cables 200mm.

Can deflection for such a small structure be calculated by treating it as a simply supported beam with a point load at 100mm?

The results I have don't seem to be right, 1.3684mm deflection for cable loading of 500kg total load 1000 kg.

I'll probably have the supports tested in a lab but I want to be in the right ball park. For the system I'm building the maximum loading for some components is 1500kg, I aiming for failure at 300kg, with a safety factor of 5. The cables are rated at 2500kg each.

Thanks for your help.
 

Answers and Replies

  • #2
Nidum
Science Advisor
Gold Member
2,990
848
With big loads to support and an always risky 'fail safe' design logic you should really consult an engineer who can see what you are doing first hand and give proper advice .
 
  • #3
Lok
555
23
Nidum makes a good point about consulting a trained opinion on this topic.
I would only like to say that by your descrition alone I have around 6 setups in mind, all different. If you would like an answer a drawing will be more explicit for anyone.
 

Related Threads on Making it safe by failing

Replies
6
Views
29K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
776
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
20
Views
12K
  • Last Post
Replies
6
Views
4K
  • Last Post
Replies
1
Views
600
Replies
1
Views
2K
Replies
6
Views
541
Top