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Stupid Wood Question

C

cda

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So occasionally run into wood in concealed spaces, in a building with a fire sprinkler system,, that would normally require fire sprinkler protection....

I do not like the clear liquid spray on,,, that is supposed to fire retard...,

So wondering if anyone has seen

spray-applied fire-resistive material

Sprayed on wood?????

 
I've seen an intumescent coating on steel that provided a 2-hour fire rating. It was applied in several coats to a 1/8" to 1/4" thickness.

All I've seen for wood is to reduce flame spread, not provide a fire resistance rating.
 
Paul Sweet said:
I've seen an intumescent coating on steel that provided a 2-hour fire rating. It was applied in several coats to a 1/8" to 1/4" thickness.

All I've seen for wood is to reduce flame spread, not provide a fire resistance rating.
Click to expand...

Fire Retardant Intumescent Paint - 1 or 2 Hour Rated Coating | FlameOFF®

Intumescent Fire Barrier Paint allows to achieve 1 or 2 Hour Fire Rating on Steel, Gypsum, Drywall & Wood. Durable, Thin-Film Fire Resistant Paint. Buy online.
flameoffcoatings.com flameoffcoatings.com

Looks like they have a 1-hour rating when applied to wood.
 
Joe.B said:

Fire Retardant Intumescent Paint - 1 or 2 Hour Rated Coating | FlameOFF®

Intumescent Fire Barrier Paint allows to achieve 1 or 2 Hour Fire Rating on Steel, Gypsum, Drywall & Wood. Durable, Thin-Film Fire Resistant Paint. Buy online.
flameoffcoatings.com flameoffcoatings.com

Looks like they have a 1-hour rating when applied to wood.
Click to expand...

the intumescent wood coatings have been around a little while now. I'm actually using it on a current project to protect a bunch of heavy timber canopy structures so I don't have to install sprinklers under them.
 
Last edited by a moderator:
cda said:
So occasionally run into wood in concealed spaces, in a building with a fire sprinkler system,, that would normally require fire sprinkler protection....

I do not like the clear liquid spray on,,, that is supposed to fire retard...,
Click to expand...
CDA
Are you a designer or a BO?
 
Is there a code basis for the product? What is the standard that is referenced by the regulations?
 
steveray said:
Darn building officials...

CDA....Can it be covered in drywall?
Click to expand...


WELL, kind of asking for future reference,,,,

On the current project, there is a lot to cover, and access has been compromised.

So GC asked about spraying, and told him no on the clear liquid stuff.

But drove by a church going up, and they were coating the steel, and thought, Can they do that to wood????
 
Last edited by a moderator:
Mark K said:
Is there a code basis for the product? What is the standard that is referenced by the regulations?
Click to expand...
For my wood canopies structures I have to provide material that meet the definition of non combustible or limited combustible material, the reference testing standard was ASTM E84.
 
Tim Mailloux said:
what was the justification for not allowing the clear liquid stuff? Is it not allowed under the code?

The product I'm using is FlameSafe Fire Poly FP100.
Click to expand...


Because I said so???

Not factory applied to the material

Wears out over the years.


In extreme weather conditions it may be necessary to re-coat surfaces every three to five years



Fire retardant coating, flame retardant coatings, fire retardant coatings, dallas fire retardants, fire retardant dallas

Fire retardant coatings for wood and wood products
www.fireretardantcoatingstexas.com


Plus I like to field test to see if it works
 
Last edited by a moderator:
Wood-framed apartment buildings are complying with NFPA 13 by blowing the concealed space full of non combustible insulation.
 
cda said:
Because I said so???

Not factory applied to the material

Wears out over the years.


In extreme weather conditions it may be necessary to re-coat surfaces every three to five years



Fire retardant coating, flame retardant coatings, fire retardant coatings, dallas fire retardants, fire retardant dallas

Fire retardant coatings for wood and wood products
www.fireretardantcoatingstexas.com


Plus I like to filed test!!!!!!! To see if it works
Click to expand...
what kind of extreme weather event are you expecting in a concealed space inside a building?
 
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Tim Mailloux said:
what kind of extreme weather event are you expecting in a concealed space inside a building?
Click to expand...


Good point,,

Plus the wood is up already, so might not be able to treat all surfaces, or treat some of the exposed surfaces properly.
 
SH225 said:
Wood-framed apartment buildings are complying with NFPA 13 by blowing the concealed space full of non combustible insulation.
Click to expand...
As long as the listed assembly allows the added insulation....

17. Blanket Insulation

Unless specifically described in the individual designs, the addition of insulation in the concealed space between the ceiling membrane and the floor or roof structure may reduce the hourly rating of an assembly by causing premature disruption of the ceiling membrane and/or higher temperatures on structural components under fire-exposure conditions.

Insulation in G500, L500, M500 and P500 Series Designs — For 1-hour-rated G500, L500, M500 and P500 Series assemblies, fiberglass insulation, either loose-fill, or faced or unfaced batts or blankets may be added to the plenum or joist space above the gypsum board, provided an additional layer of gypsum board is added to the assembly. The gypsum board should be of the same type as shown in the individual designs. The base layer of gypsum board should be attached with the fastener type and spacing as described in the design. It is not necessary to tape the joints of the base layer. The finish layer of gypsum board should also be attached with the fastener type and spacing as described in the individual design. The length of the fasteners should be increased by a minimum of the gypsum board thickness of the additional layer. The joints in the finish layer should be finished as described in the design.

Other methods of adding insulation in the plenum or joist cavity are not permitted unless indicated in the individual designs.
 
steveray said:
As long as the listed assembly allows the added insulation....

17. Blanket Insulation

Unless specifically described in the individual designs, the addition of insulation in the concealed space between the ceiling membrane and the floor or roof structure may reduce the hourly rating of an assembly by causing premature disruption of the ceiling membrane and/or higher temperatures on structural components under fire-exposure conditions.

Insulation in G500, L500, M500 and P500 Series Designs — For 1-hour-rated G500, L500, M500 and P500 Series assemblies, fiberglass insulation, either loose-fill, or faced or unfaced batts or blankets may be added to the plenum or joist space above the gypsum board, provided an additional layer of gypsum board is added to the assembly. The gypsum board should be of the same type as shown in the individual designs. The base layer of gypsum board should be attached with the fastener type and spacing as described in the design. It is not necessary to tape the joints of the base layer. The finish layer of gypsum board should also be attached with the fastener type and spacing as described in the individual design. The length of the fasteners should be increased by a minimum of the gypsum board thickness of the additional layer. The joints in the finish layer should be finished as described in the design.

Other methods of adding insulation in the plenum or joist cavity are not permitted unless indicated in the individual designs.
Click to expand...
Steveray, what are you referencing above? Can you provide a link?
 
Used Firefree 88 back in the day, surface applied to one side. Vender demonstrated it on the interior of a cardboard tunnel for local fire chiefs. No heat transfer to back side. Stuff can be scraped off and reapplied if a fire occurs. Used on old hotel and apartment corridors. Has a UL rating.
 
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