I wanted to pose the question on hazardous material storage lockers. We wish to protect the locker in accordance with Chapter 14 of NFPA 30 and have rated it for 4-hours to eliminate the need for fire separation distance to the immediately-adjacent main building as allowed.
The locker will not be structurally attached and will only have flashing connecting the two to keep out the elements, garbage, and animals. The locker will only have people in as necessary to get the liquids out.
The main building has a door on the "exterior wall" that opens and "reveals" the 3-hour rated hazardous material locker door, which you have to open to get inside the locker.
NFPA 30 2015 handbook Section 14.4.3 denotes that lockers over 1500 sqft should be protected permanent building such as attached buildings or warehouses. Our locker is under the 1500 sqft requirements so therefore I would say we are not a building but a "locker".
Therefore, the exterior wall openings allowances of IBC (2015) Table 705.8 would be to the lot line (over 10ft) and not the locker itself (0ft), allowing our client to access the locker from the inside of the main building and not having to go outside to access it from the exterior.
I was wondering if anyone has had a similar experience or if we should just call it part of the main building and protect it as such and lose the allowances of Chapter 14.
Thanks in advance!
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