BillS
Member
Existing building is changing use from S-2 to B. This is a change to a higher-hazard category in 2018 IEBC T1011.4.
Therefore, Section 1011.4.1 EXC 1 says that existing stairways only have be enclosed as per S903.1, which refers you to S802.2.1. There, EXC 5.1 says that the enclosure isn't required because the building is under 3,000 SF. Yay!
However, Section 1011.7.2 says that, because of the same higher-hazard category change, interior stairways have to be enclosed as per IBC, which would require a 1-HR rating. Boo!
What gives? How can these two sections co-exist? I don't understand how you can ever take advantage of the exceptions offered in the former if they are always superceded by the latter. Why write the first option (only comply with S903.1) if it can't ever be used?
Can anyone clarify this for me?
Therefore, Section 1011.4.1 EXC 1 says that existing stairways only have be enclosed as per S903.1, which refers you to S802.2.1. There, EXC 5.1 says that the enclosure isn't required because the building is under 3,000 SF. Yay!
However, Section 1011.7.2 says that, because of the same higher-hazard category change, interior stairways have to be enclosed as per IBC, which would require a 1-HR rating. Boo!
What gives? How can these two sections co-exist? I don't understand how you can ever take advantage of the exceptions offered in the former if they are always superceded by the latter. Why write the first option (only comply with S903.1) if it can't ever be used?
Can anyone clarify this for me?