CFS Wall Framing 3

[dik]

Current construction consists of Prefinished metal siding, densglass sheathing, 'Z' clips and 2x8@16 CFS vertical studs.

Should the Z clips be secured directly to the steel studs with the densglass fitting between and the siding connected directly to the z clips, or

Should the densglass be secured to the steel studs with the z clips secured through the densglass to the steel studs. The densglass acting as a bit of a thermal break and the siding connected to the z clips?

Any suggestions?

Dik

 

[EngineeringEric]

Why do you have z-clips? densglass can just attach straight to the studs. Also your studs are no 2x8, maybe 800s162-33?

I know you will get there, but is this your first CFS job dik? usually you are the one with all these answers

Few things to look out for:
- Bridging
- Top Track in bending
- base of stud to bottom track connection
- lateral? shearwalls require 43-mil or are you x-straping?
- headers?
- dont mix thicknesses on site without changing stud flange or depth.

 

[CANPRO]

For constructability reasons I'd try to avoid fitting the denseglass between the z-clips. And obviously if you're counting on the sheathing for lateral resistance you'll have to use continuous sheathing.

Not sure I've seen pre-finished siding attached through the denseglass into the studs, but I know I've seen brick with brick ties fastened through the denseglass.

 

[jayrod12]

Where dik and I practice, exterior insulation is now the norm for CFS jobs. Therefore the Z-girts are there to give the siding something to mount to and allow for the insulation.

dik, on the jobs I've done the work on, it goes, siding-->Z-girts(horizontal or vertical depending on the siding)-->densglass-->studs. The densglass provides a bit of thermal break and the only thing they need is longer screws for the Z-girts.

 

[dik]

Thanks gentlemen...

EngineeringEric

I need 2x8 for compression and flexure, or, something of that ilk.

First one where I’ve actually been involved with the detailing. A little out of my area, but, not concerned... have done a lot of things where they were my 'first' one.

Maximum load on stud, and two fasteners capable of transferring it. I understand with CFS, you can spec the actual size of the members.

Top channel taken care of.

Using 18ga. Minimum. I have to check the size again... project has changed since I first looked at them.

Haven’t looked at lateral yet, not a big issue. I figured the densglass would easily take care of it.

Headers taken care of, no large openings.

I was thinking of cold transfer and was going to sandwich the densglass between the Z clip and the CFS stud... Because the wall profile is running vertically, I thought the z clips would allow the wall to attach to the studs through the densglass, and give a bit of an air gap; I figured 1” would be an adequate space.

CANPRO
Seen the same with masonry strap ties that’s why I was thinking about putting the Z clips on the densglass...

Jayrod
That was my thoughts... I’ve asked the client to have mech check for NECB issues... not likely since without insulation, the room is warm in winter due to the large electrical equipment... it’s near Thompson, so a little cooler than the ‘peg.

Same with roof construction... using z clips to provide a 1” air space between the densglass and the standing seam prefinished roofing. I've increased the size of the z clips to provide a 1" air space... up from 1/2".

The project 'started' by me giving a little help to a friend... The Best Intentions Paving Company... comes to mind.

Dik