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Dead end corridor provision

I have copies of the UBC dating back to 1955, and they had a dead end corridor requirement. At that time it was 12 feet. It changed in the 1958 UBC to only allow dead ends of 12 feet when the occupant load was 10 or less. I do not have a copy of the 1961 UBC (I am willing to buy a copy if you have one), but the 1964 UBC allows dead ends of up to 20 feet. So I do not know if it changed to 20 feet in 1961 or 1964 (they did not annotate the margins back then).

The exceptions to the dead end requirements were only introduced in the 2000 IBC.
 
RLGA said:
I have copies of the UBC dating back to 1955, and they had a dead end corridor requirement. At that time it was 12 feet. It changed in the 1958 UBC to only allow dead ends of 12 feet when the occupant load was 10 or less. I do not have a copy of the 1961 UBC (I am willing to buy a copy if you have one), but the 1964 UBC allows dead ends of up to 20 feet. So I do not know if it changed to 20 feet in 1961 or 1964 (they did not annotate the margins back then).

The exceptions to the dead end requirements were only introduced in the 2000 IBC.
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Thank you.
 
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