connection between CFS and WF steel member

[Astudy]

Hello everyone,
Can anyone tell me what the method of connection between a cold-formed steel member (C section) and a thicker WF steel member is, by using welding, bolts or screws? any thoughts are appreciated.

 

[dik]

It can be done by any of the fasteners... Teks 5 fasteners can be used, holes can be drilled for bolts (likely the least cost effective method) and welding can be done... this can have an impact on coating systems... you can also use powder activated fasteners (PAF) which can be quite economical. What sort of fastening are you requiring?

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[KootK]

I like screws if the WF plate thicknesses are thin enough for that to be feasible. Advantages:

1) Least cost, I suspect, in many applications.

2) Bolts will have more connection slip before everything engages.

3) Welding cold formed material without burn through requires special skill.

4) As a general principle, weaker materials like wood and thing sheet steel tend to favor smaller scale, more frequent fastening.

 

[JedClampett]

I'm not sure of you orientations, but I've used Simpson products before. They make some that are CFS to hot rolled.

 

[Astudy]

Hi Dik, hi Kootk,
Thank you.
I like to use bolts or screws. But the WF flanges is a lot thicker than the C section of CFS. In AISI, welding is the only method mentioned that can be used for any position, i.e. sheet to sheet or sheet to thicker steel members. Can I say that welding is the best way for my case?

 

[phamENG]

Welding is very rarely the best course here. It's really easy to burn right through the stud while trying to heat up the thicker member.

With the right tools, screws can be installed in flanges up to 5/16" thick, though 1/4" is a good practical limit to burn out the tools if you have a lot of them.

If that doesn't work, PAFs are my go to.

 

[Agent666]

On some projects I've been involved with in the past, the contractors have had success predrilling the thicker plate and CFS, and then using self-drilling screws when fixing the thinner CFS's to it to get around the general plate thickness limits on using these types of screws.

 

[Astudy]

Hi phamENG;
Thank you!
The WF is w14x30, flange is thicker than 5/16in. So I will go with PAFs.

 

[Astudy]

Hi Agent666 Hi JedClampett
Thanks!