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Hi everyone.
Well, I’m lucky enough to have bought into a historic building in the downtown of a small Rocky Mountain town.
It has an impeccable tin ceiling, covered by a rather hideous drop ceiling. We intend to rip out the drop ceiling and keep the tin. One of my questions is, the building has 2 floors, and the tin ceiling is between main and upper. We’d like to expose the tin, but I need to know about fire rating, i.e. will it be a problem to expose it, what’s its burn thru rating and such. If anyone knows please let me know.
Second, I’ve looked into the span books to no avail on this stuff, I need to know the span that a floor joist 3 x 14 (true measurements) (fir) on 16 inch spacing is rated for. These joists run across the building (widthwise) on the building which is about 90 feet long and 30 feet wide.
Finally, I’d like to know what size beam would be good for holding the middle of the building, on a span of 15 feet on each side, with posts interspersed as necessary (max length for this span, given various beam thicknesses). Assume old-growth recycled fir. I’m thinking at least 6×12 or 6×16 or something. I may also be able to get new larch (tamarack) but since it’ll be ‘new’, it’ll probly be green and check/move alot. The snow loading around here is pretty significant, so factor in 33 psf, 66 psf, or 99 psf, for discussion purposes, please!
I know this is asking alot, any help wud be most appreciated! I love the magazine and am really grateful this forum is here! BTW if anybody has any questions about house renos for an old house, I just finished a doozy!
Thanks!
Marko Maryniak
Replies
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This is a joke, right?
Spend a few bucks and get professional help with your problem.
Gabe
*No kidding. I wasn't about to break out the Fisher Price tools and start banging away! [On second thought, maybe I'll just nail a couple of boards together and stick them up there. That oughta hold!] Not to worry.Anyway, I did look at HUD guideline no. 8 and didn't find anything about flame-thru on tin ceilings. I guess I'll have to query some manufacturers. As for the structural stuff, our span tables indicate something like 18 feet for 2x12s on 16 inch centers. But they don't go higher than that, so I was curious, not being a cat and all. Being a professional person myself I know the value of good advice. I was more looking to make conversation, and have something fun to think about.
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Hi everyone.
Well, I'm lucky enough to have bought into a historic building in the downtown of a small Rocky Mountain town.
It has an impeccable tin ceiling, covered by a rather hideous drop ceiling. We intend to rip out the drop ceiling and keep the tin. One of my questions is, the building has 2 floors, and the tin ceiling is between main and upper. We'd like to expose the tin, but I need to know about fire rating, i.e. will it be a problem to expose it, what's its burn thru rating and such. If anyone knows please let me know.
Second, I've looked into the span books to no avail on this stuff, I need to know the span that a floor joist 3 x 14 (true measurements) (fir) on 16 inch spacing is rated for. These joists run across the building (widthwise) on the building which is about 90 feet long and 30 feet wide.
Finally, I'd like to know what size beam would be good for holding the middle of the building, on a span of 15 feet on each side, with posts interspersed as necessary (max length for this span, given various beam thicknesses). Assume old-growth recycled fir. I'm thinking at least 6x12 or 6x16 or something. I may also be able to get new larch (tamarack) but since it'll be 'new', it'll probly be green and check/move alot. The snow loading around here is pretty significant, so factor in 33 psf, 66 psf, or 99 psf, for discussion purposes, please!
I know this is asking alot, any help wud be most appreciated! I love the magazine and am really grateful this forum is here! BTW if anybody has any questions about house renos for an old house, I just finished a doozy!
Thanks!
Marko Maryniak