I have a client that currently occupies a three story ±300,000 sf building located in California. The construction type of the building is Type I-A w/ fire sprinklers. We have been remodeling the entire interior of the building for the past few years and are constantly running into new issues, whether it be from the original building construction or new code interpretations.
My Building Official has been concerned with rooms that are classifid as "Storage" and are larger than 100sf. He believes that they need to be classified as "Incidental Uses" and therefore being required to be seperated from the rest of the B Occupancy per CBC 508.2.2 & 508.2.2.1 with some means that resists the passoge of smoke. I don't see how a storage room (and in some cases file rooms) are to be considered an Incidental Use when they are part of an overall B Occupancy. I can't even get a clear definition for what qualifies as Incidental or Accessory. And it looks like the 2010 CBC has combined them to now be Incidental Accessory Occupancies.
So, my questtions are as follows: 1)Can they rooms be classified as an Accessory Occupancy or even classified as a completely different use (i.e. and S-1 for book storage or furniture storage)and then not require any occupancy seperation? 2) Are all "storage rooms" governed by table 508.2 and consided incidental uses?
I have attached a drawing of the current area of concern for your review. Thanks for any help in advance.
ARCHITECT, LEED AP