capacity for aluminum "breakaway" clips? 2

[kbsooner]

Has anyone been able to get an out of plane capacity for the aluminum breakaway clips used for a fire rated shaftwall assembly? The clip is intended on holding the wall in place in case either side of a building structure burns away and leaves the clip on the protected side in place. In this scenario, you would need to check the system for a temporary wind exposure. Both USG and Dietrich offer this clip and so far I have been stonewalled as far as getting a capacity from either. Perhaps the screw connections themselves would be the controlling factor in lieu of failure at the clip itself, but I was curious if anyone else had looked into this.

 

[woodman88]

If you check out the ICC ES-Report 92-19 you will see the Dietrich is only rated for the 5 psf interior wind load. Attached is a link to the ICC website. I am pretty sure the USG clip is the same. The intent IMHO is for protection during the fire, with the remaining building to be repaired ASAP.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

 

[kbsooner]

Would there be some precedent to check the wall for a temporary wind exposure? IE someone doesn't realize the wall needs to be braced for a week or 2 after the fire?

 

[woodman88]

I would think that the fire or building department would require the owner to address possible structural problems that resulted from such a fire ASAP.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.