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Incidental Use Occupancy - and fire separation

goaneer

Member
Joined
Feb 27, 2013
Messages
9
Location
San Jose
Hi

Typically single buildings with ancillary uses and different occupancies need to have a fire rated separation per 508.2.5 or Table 503. For example within a B occupancy one may have S1 occupancy which then needs to have one hour separation if more than 100 square feet.

However, is there a co-relation ifor multiple buildings on one site .. ie one is 'B' and 'S'. Can S occupancy building be considered as an ancillary use to the main one?

Just would like to know what you all think.
 
cda said:
Are you asking about two separate buildings on the same lot
Yes. The scenario is the S occupancy building is 30' away from the other building. So from the fire separation perspective the S occupancy building does not have to be rated. However, the incidental use table (I believe is applicable to uses in a single building) states that storage spaces over 100 square feet need one hour rating.

Then the question that arose is would this separate building if meant for incidental use fall under the incidental use category and a one hour rating become applicable?

I don't think the code states that this table is meant for single buildings only.

Hence just looking for clarification.
 
We only use incidental use when the two occupancies are within the same building. When we have two completely separate buildings we classify the buildings as whatever occupancy is ongoing in the buildings.
 
tmurray said:
We only use incidental use when the two occupancies are within the same building. When we have two completely separate buildings we classify the buildings as whatever occupancy is ongoing in the buildings.
thank you so much. This helps clarify
 
goaneer said:
HiTypically single buildings with ancillary uses and different occupancies need to have a fire rated separation per 508.2.5 or Table 503. For example within a B occupancy one may have S1 occupancy which then needs to have one hour separation if more than 100 square feet.

However, is there a co-relation ifor multiple buildings on one site .. ie one is 'B' and 'S'. Can S occupancy building be considered as an ancillary use to the main one?

Just would like to know what you all think.
What version of Code?

Have you looked at Non-Separated Uses

Also, Chapter 5 for Areas. Think there is the provision for treating multiple buildings on same site as one.
 
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