OCBF Height Limits
OCBF Height Limits
(OP)
All
A question on the height limits (ASCE 7-10 - Table 12.2-1). I have a fire station with apparatus bay on the right and a 2 story fire station/police department on the left. The plan is to use steel framing. Per Table 12.2-1, the height limitation for an OCBF in SDC D is 35 feet. Most of the building is under this height limit except for an architectural tower (20 ft x 20 ft) that goes to about 45 feet. The tower is tied to the building and can be entered at the second floor and is also tied in at the roof level. Above the roof of the building it is open on 2 sides and some architectural screening on the other 2 sides.
Since the tower is not part of LFRS, can I still use the OCBF and not have to go to a SCBF?
A question on the height limits (ASCE 7-10 - Table 12.2-1). I have a fire station with apparatus bay on the right and a 2 story fire station/police department on the left. The plan is to use steel framing. Per Table 12.2-1, the height limitation for an OCBF in SDC D is 35 feet. Most of the building is under this height limit except for an architectural tower (20 ft x 20 ft) that goes to about 45 feet. The tower is tied to the building and can be entered at the second floor and is also tied in at the roof level. Above the roof of the building it is open on 2 sides and some architectural screening on the other 2 sides.
Since the tower is not part of LFRS, can I still use the OCBF and not have to go to a SCBF?






RE: OCBF Height Limits
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: OCBF Height Limits
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: OCBF Height Limits
RE: OCBF Height Limits
RE: OCBF Height Limits
Thanks for the comments.
RE: OCBF Height Limits
If this were my building I would not even consider using OCBF, I am surprised that the fire authority allows the use. Had they wanted a braced frame system, I would select a buckling restrained brace frame system, R of 8 easier connections than SCBF, small footings, and better performance during and after a seismic event.