My best guess... You have W-shaped steel beams supporting a cast in place floor system. They placed the bottom forms for the cast in place to the base of the bottom flange of the steel beam. That might have been done as a poor boy fireproofing and to get a bit more span out of the deck (think loads at a 45 degree angle to reduce the center span on the slab)
Get your strux engineer to evaluate it if you are concerned about it's load bearing capacity, although I'd expect it to be plenty if it was a brewery.
If you have requirements for fire rating, you'll have to evaluate it yourself. Try "Resource A - Guidelines on Fire Ratings of Archaic Materials and Assemblies" in the existing building code.
May 22, 15 1:06 pm ·
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Old Brewery Construction Question
Could someone please explain this floorplate construction? I haven't personally come across this before.
This is a load bearing masonry structure built in 1894.
Looks like a pan deck system.
Some kind of proto-double tee, probably not precast though...
My best guess... You have W-shaped steel beams supporting a cast in place floor system. They placed the bottom forms for the cast in place to the base of the bottom flange of the steel beam. That might have been done as a poor boy fireproofing and to get a bit more span out of the deck (think loads at a 45 degree angle to reduce the center span on the slab)
What Mightyyaa said.
Get your strux engineer to evaluate it if you are concerned about it's load bearing capacity, although I'd expect it to be plenty if it was a brewery.
If you have requirements for fire rating, you'll have to evaluate it yourself. Try "Resource A - Guidelines on Fire Ratings of Archaic Materials and Assemblies" in the existing building code.
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