Cast Iron Column - Fire Rating
Cast Iron Column - Fire Rating
(OP)
Has anyone ever tried to come up with a UL listing to make an existing cast iron column 2 hr rated? If so, please give references.
Thanks
Thanks
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Cast Iron Column - Fire Rating
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RE: Cast Iron Column - Fire Rating
Why not just enclose it in a 2 hour rated enclosure? Something like steel studs with two layers of 5/8" drywall should be enough, but you must verify that with the UL details.
RE: Cast Iron Column - Fire Rating
http://www.structuremag.org/archives/2003/december_january/fireprotection.pdf
RE: Cast Iron Column - Fire Rating
RE: Cast Iron Column - Fire Rating
RE: Cast Iron Column - Fire Rating
RE: Cast Iron Column - Fire Rating
You will definitly have to fireproof it and if you think about what you see in other parking garages I would bet you are looking at spray-on fireproofing, concrete or masonry enclosure. What does your local building code offical say? Have you looked for approved UL Listed Assemblies in the UL book? You could also call Underwriters Labs and talk to someone in their techncial services department, although you might have to subscribe to their service to get a written answer.
RE: Cast Iron Column - Fire Rating
Thanks for the help.
RE: Cast Iron Column - Fire Rating
You could make a reasonable argument that the column is protected in the unlikely event of a fire and yet the cost wouldn't be that great, the cast iron column would be the form for the concrete.
Just a thought.
RE: Cast Iron Column - Fire Rating
Unfortunately I'm really outside the box on this one. The building code official has been little help - he said its not combustable and therefore doesn't need to be protected!
RE: Cast Iron Column - Fire Rating
One option will be to embed the entire column into concrete. This can be done by wrapping wire mesh around the existing column and then plastering with air entrapping concrete. The mesh should be able to act as reinforcement and hold the concrete layer in place. Though I do not know how practical it will be in your case.
BFN
RE: Cast Iron Column - Fire Rating
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RE: Cast Iron Column - Fire Rating
Thanks for all your help.
RE: Cast Iron Column - Fire Rating
I've never used it, but have seen it specified on a job I quoted. It must be fine, I just find it unsettling that a thin paint film will meet a two hour rating. "Intumesce: to swell, enlarge, expand or bubble up. as with heat" from the Webster's New World Dictionary.
dougantholz, please post a note on the product that is finally chosen.
RE: Cast Iron Column - Fire Rating
Based on your definition, it sounds like you have come up with the "Viagra" solution.
RE: Cast Iron Column - Fire Rating
CYA and keep the records of what they say!!
RE: Cast Iron Column - Fire Rating