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What to do when an Existing Building does not meet Existing Building Code?

Question asked by jkimmich on Jun 20, 2019
Latest reply on Jun 24, 2019 by jkimmich

I am an Architect working on a renovation project on an existing charter school building. It was built in 1963 as a school building, but now that we are updating the mechanical and a few interior partitions it came to our attention the corridor width does not meet the 'Existing Building'  requirement for corridor width by 8". The AHJ is forcing the issue and wants the private school to demo the entire 150' long CMU wall that supports the roof structure to bring the existing building up to Existing Building Code just because we are modifying the mechanical and some minor interior items... 

We have vetted all other items:  School has added Sprinklers and emergency egress windows in all classrooms, we've confirmed egress width capacity and tried the 'technically infeasible' option due to structure.

One course of action they mentioned was to confirm standard of 1963 NFPA.

Does anyone have access to an old archived version they'd be willing to share? Or any other alternatives to satisfy the AHJ?