I joist Flak Jacket

[69gp]

Hi,

looking for a little info on I joist Flak Jacket for my garage build.
https://www.weyerhaeuser.com/woodproducts/engineered-lumber/tji-joists/flak-jacket-fire-protection/

Has anyone used them?
What was the cost difference between the flak and regular I joist?

As an alternative and I know it would not be as good a factory applied and meet any building codes do you think it would be worth my wild to spray my I joist with an after market fire retardant paint or an addative?.

Its late in the game as my drawings are 99%. But i was never a big fan of I joist but need them for the long span of the garage.

thanks
steve

 

[theoldwizard1]

Even 1/2" of regular plasterboard gives some fire protection.

 

[rburke65]

What is a Flak Jacket?

 

[Stuart in MN]

What is a Flak Jacket?

It's in the link - it's a coating that's applied to TJI truss joints:

TJI® joist with Flak Jacket® protection combines the industry’s leading I-joist brand with a proprietary, factory-applied coating that enhances the joist’s fire resistance and enables them to meet one- and two-family fire protection code requirements.
Flak Jacket product availability varies by market. Please contact your Trus Joist Territory Manager for availability.

 

[73RR]

The coating would be helpful if the I-joists are left exposed; is that what you are planning to do? Otherwise, hang some sheetrock on the bottom.
As to costs, ask at your local lumber yard/HomeDepot.

 

[ishiboo]

Doesn't appear they add any protection to the lower member which is where it would count the most. I would definitely spend that money on drywall... size everything for dual layers of 5/8 if fire is such a concern, and add blocking to limit flame spread in the joist bays.

 

[ishiboo]

Plus, it appears Flak Jacket sales are on hold as of yesterday:

http://www.prnewswire.com/news-rele...ts-with-flak-jacket-protection-300490388.html

 

[rburke65]

Thanks Stewart.

 

[jbwilkins]

From an insider....you may want to hold off....Weyerhaeuser is looking into that product and complaints about odors....they’ve asked dealers to halt shipments until further notice....this was just pushed out 7-6 or 7-8....