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Thread: Coating on TJI
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07-01-2015, 05:29 AM #1
Coating on TJI
All the joists were coated with a high gloss type finish, almost an epoxy look to it. Does anyone know what this might be?
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07-01-2015, 07:06 PM #2
Re: Coating on TJI
Probably an intumescent coating. Some codes require covering engineered joists, using a fire sprinkler system, or a coating to reduce the risk of collapse in the event a fire occurs.
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07-07-2015, 05:36 AM #3
Re: Coating on TJI
Actually it looks like there is a coating on the side - covered by the insulation , any chance you pulled some insulation and took a picture
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07-07-2015, 04:27 PM #4
Re: Coating on TJI
Looks like an intumescent paint as suggested by Mark. From a fire-protection perspective it makes little sense to coat the sides of the members and not the bottom, plus that engineered limber (or solid lumber) will last longer in a fire than steel bar joists, which tend to twist and sag when they get hot.
Could also be a spray-applied vapor barrier separating the conditioned upstairs from the basement or crawl space (?).
David
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07-07-2015, 05:06 PM #5
Re: Coating on TJI
The coating was on all the joists. The insulation had a vapor barrier, so I don't think it was that.
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07-07-2015, 06:32 PM #6
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07-07-2015, 06:46 PM #7
Re: Coating on TJI
That may be it. I was not aware that this was offered from the factory. See image below.
TJI Flak Jacket.jpg
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