Collar tie in a concrete roof

Feb 20, 2007 4 Replies

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



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

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....."

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