Intumescent application for solid wood columns
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| Posted in Building Code Questions on
Hello,
We are trying to find a 2 hour fire protective rating for 14″ diameter installed wooden columns, and were wondering if an approved intumescent application is available on the market.
Regards,
Luke Gunnewegh
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Replies
Hi Luke,
There are a few paints that will provide a 2-hour fire rating to assemblies that include wood framing, and two-hour ratings for steel columns, but I could not find a product that will provide a 2-hour fire rating to a wood column. There are paints that can provide a 1-hour rating, but it appeared the paint is for an interior application only. Maybe someone else on the forum knows of a product.
Randy
Tiber beams char and provide their own fire protection. I would check your local code, but ours recognizes this fact and in most cases mass timer beams can be left exposed or require minimal additional protection.
Besides intumescent paints there are fire protection sprays (made of binder/fibers/cement, often see it industrial places on steel beams) that will have longer rating.
>"Besides intumescent paints there are fire protection sprays (made of binder/fibers/cement, often see it industrial places on steel beams) that will have longer rating."
This stuff is always fuzzy/foamy though, a like a crumbly/mushy version of spray foam. It's not used on exposed surfaces that will be subject to getting touched or bumbed into, because it will come off in clods upon impact. I don't think it would be a good option for exposed columns near ground level.
Bill