×
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

Shearwall Plywood Over Lathing

Shearwall Plywood Over Lathing

Shearwall Plywood Over Lathing

(OP)
Sometimes the questions we get from homeowners just make us scratch our heads and wonder what they were thinking...

Still - they need an answer.  

We got a call today that someone installed their shearwall plywood over the top of their stucco lath paper/wire and they want to know if that's okay.

On the one hand, the plywood is still attached to the underlying studs, providing some lateral bracing.  On the other hand, there's now a gap between the two.

Anyone have a suggestion on where to go with this?

Thanks!

RE: Shearwall Plywood Over Lathing

Nails dont work very well in bending, the lathing needs to be removed and the plywood connected directly to the studs.

csd

RE: Shearwall Plywood Over Lathing

(OP)
So that's why they always bend when I'm driving them in!

Ideally they would remove the lathing and connect directly, but the question is whether there's any other solution that is less costly.  

For example, more nails, or possibly using screws to suck the plywood in tighter to the studs.  

Again - I know the answer is "that's not the best way to do it", but I'm just curious to know if anyone has seen a work-around or even a code provision that provides for a reduced allowable shear in this situation.

RE: Shearwall Plywood Over Lathing

If the sheathing on the inside of the wall isn't in place yet, maybe you can attach the plywood there.

RE: Shearwall Plywood Over Lathing

The 2003 IBC Table 2306.4.1 provides shear values for plywood shearwall sheathing placed over the top of gypsum sheathing (most codes have a similar table). This is not your situation - and it appears that the gypsum sheathing can actually give you higher shear values when you combine the plywood and gypsum sheathing - which you do not have.  You should contact APA to see if they have any information or suggestions.

RE: Shearwall Plywood Over Lathing

Stucco has shear value all by itself, although not very much. I take it it won't pencil out without the plywood?

I agree you should hit up the APA - they might have a tech. bulletin about it or something close that would give you insight to the behavior of the system.

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