STHD over water-resistive barrier

[bnymbill]

I checked out Simpson's website and guides but couldn't find an answer. My gut says the STHD's should be under the water-resistive barrier so you don't create a bunch of extra nail holes in the WRB. However, I can't definitively call it out without being able to back it up. Am I overthinking it or does Simpson's site/guide not cover it because it's assumed it would be installed underneath to the studs or sheathing (at studs)?

 

[Joe Engel]

AHJ preference... in my opinion, its all about the odds. Under WRB (typically seen in my area), depending on the contractor the installer could have skipped a few holes (not likely as "a nail in every hole" is standard practice). Over WRB, it's visible for inspector but 20 or so more holes for moisture intrusion. over and above the fasteners used along with brick ties. Sounds like the same hold down resistance either way. Practically speaking, the metal strapping in the Memphis area, a D earthquake zone, is typically done after sheathing crew and before cornice guy does house wrap. In some jurisdictions further South (high wind zones), separate sheathing and WRB inspections are a requirement.

 

[ICE]

Straps are verified during a framing inspection. The WRB is a separate inspection after the framing passes inspection.

 

[bnymbill]

Thanks for the comments, I just talked to Simpson and they said underneath for corrosion protection as well as the extra nail holes in the WRB.

In PA, some jurisdictions only do 7 inspections for new construction, which is crazy. So, they're trying to cram too much into each inspection and ignoring a lot of the code as a result (a lot of things covered up between inspections).