×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Coldform / Gypsum Shear Wall

Coldform / Gypsum Shear Wall

Coldform / Gypsum Shear Wall

(OP)
I've got a storage unit project using coldform framing. The exterior walls will be a typical coldform shearwall with gauge steel siding. However, the interior walls which I rely upon for shear, will only have 5/8" gyp board on both sides and no steel siding.

Do I need to use and R value of 2 instead of an R value of 6.5 ?! If so I'll need to put steel siding in all the interior walls. I'm hoping there's a way around this.

RE: Coldform / Gypsum Shear Wall

Make sure to verify you can use GYP for seismic resistance. IIRC, there may be a code issue with it.

RE: Coldform / Gypsum Shear Wall

(OP)
ANSI 400 has provisions for it. But I can't make it work with a R value of 2 anyways... looks like i'll have to throw steel siding into the interior walls.

RE: Coldform / Gypsum Shear Wall

I've had good success with the Sureboard product. It's steel lined gyp board. I have used it on several east coast seismic projects.

RE: Coldform / Gypsum Shear Wall

ditto sure-board

RE: Coldform / Gypsum Shear Wall

You could also strap brace it. Might be cheaper overall than the other alternatives.

RE: Coldform / Gypsum Shear Wall

(OP)

Quote (XR250)

You could also strap brace it. Might be cheaper overall than the other alternatives.

What do you use for the flat straps? CS/CMST coiled straps? I'm wondering about holes in the straps because Fu*An must be greater than Fy*Ag

RE: Coldform / Gypsum Shear Wall

Have not done one in awhile but I never spec'd coiled strap as the loads were generally too high. I believe most of mine were 3 or 4" wide, 14ga strap that was made up by a sheet metal fabricator.
You would have to check the strap for reduced area from the holes, but in my experience, the ability to get enough fasteners in the strap was the limiting factor.

RE: Coldform / Gypsum Shear Wall

I second the use of flat strap bracing if you can make it work. Sureboard is great structurally but we get lots of complaints about it being costly and difficult to work with. This tech brief is a great introduction to cold-formed shearwalls and strap braced walls (Link).

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources