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Collar tie in a concrete roof mcardone02 02-20-2007
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Posted by on February 20, 2007, 4:54 pm
I have a concrete roof (40X20) where my client wants a vaulted
ceiling. The ridge line is aprallel to the 40 ft. line Ridge beam has
to span almost 40 feet. (no middle posts required). There is a 3 ft
space between the ceiling and the roof. I'm thinking of using collar
ties above the ceiling line. I will design it to carry a tensile force
equal to the thrust.

MC


Posted by Bob Morrison on February 20, 2007, 5:38 pm
In a previous post mcardone02@gmail.com wrote...
> I have a concrete roof (40X20) where my client wants a vaulted
> ceiling. The ridge line is aprallel to the 40 ft. line Ridge beam has
> to span almost 40 feet. (no middle posts required). There is a 3 ft
> space between the ceiling and the roof. I'm thinking of using collar
> ties above the ceiling line. I will design it to carry a tensile force
> equal to the thrust.
>

Are you an engineer? If not, then this type of design is not for the
inexperienced.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by Dennis on February 20, 2007, 7:16 pm
The 40 ft. span is the problem of course, probably need to design a flitch
beam or use an I-beam.
Bob's right about this, it's a situation where "if you have to ask....."


>I have a concrete roof (40X20) where my client wants a vaulted
> ceiling. The ridge line is aprallel to the 40 ft. line Ridge beam has
> to span almost 40 feet. (no middle posts required). There is a 3 ft
> space between the ceiling and the roof. I'm thinking of using collar
> ties above the ceiling line. I will design it to carry a tensile force
> equal to the thrust.
>
> MC
>



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