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Melding the UBC and IBC Requirements - Rated Corridors No Longer Required
April 30, 2019
8:58 am
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roseman1954@gmail.com
Fort Collins, Colorado
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May 3, 2015
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We have a situation where a large building was originally built under the 1997 UBC, an addition of about 9,500 square feet is proposed. One of the fire rated exit corridors that leads to an exit door will now be opening into a new space that is clearly marked as to exit travel. The existing building is fully sprinkled and the proposed addition will be as well. The exit travel distances are all well within the range allowed (mostly B occupancy) with some A-3 areas that are fire rated wall assembly separated such that they do not exceed the 10%.

The big problem point is where the code says that once an occupant is within a certain degree of protection, they shall remain there until exiting the building. The IBC would not require the rated corridor where the UBC did. How have any of you dealt with this situation? Like I stated, the travel distances are good and the building is fully sprinkled. Would you force the construction of the fire rated corridor from the UBC even though it is not required in the IBC now? What compromises could be considered? The existing building code seems to offer little help. Frown

Stan V. Griep

Codes Consultant

30+ Years Experience