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IFC IBC fire codes and occupancy.

Bradley5

Mechanical
Jun 18, 2024
8
I wasn't certain which section to put this but we are assisting in design and construction of a multi use building in a rural area. The building size is 15,000sf, prefab steel building, free span single story, 20' tall. Because of the rural area and desire from owners, avoiding a sprinkler requirement is a mandatory, whether that is through restricting use or other methods.

The building is to be constructed on a large tract that is currently zoned residential, but intent is to seek industrial zoning in the future, though actual building use would not change. I mention this because during construction, the intent is to focus on industrial use code compliance to make the transition to commercial zoning easier.

The intended use is metal machining with a small office space. In trying to study up more on our current code of IFC 2024, it appears F-2 occupancy may apply? It appears if building size exceeds 12,000sf as an F-1, sprinklers are required? I guess what I am trying to learn is how to maintain an F-1 occupancy, and what are the 'hot buttons' for fire officials. There will be a few drums of oil in the facility, probably a car or two, but the primary use is machining of metals. That would exclude Magnesium.

I realize a conversation with fire officials could clear some of this up, but I'd like to understand the codes better. I am not sure if certain items such as oil drums would need to be in a separate room as they might be F-2 items? Or does occupancy hover more around the primary use? As to actual occupants, that should never be an issue, not to exceed 50 humans.
 
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Bradley5:​

I believe a machine shop falls into F-2 metal products - fabrication and assembly. If the building is surrounded by a minimum 60' clear open area around its entire perimeter it can be considered an unlimited area building. See 507.3 of the IBC. The storage and accessory uses can complicate this assumption. It is actually a somewhat tricky calculation. You'd be best off getting an architect to help with the calculations, then a sit-down with the building and fire officials would clarify their concerns. But, it looks like you may not be area constrained.

Regards,
DB
 

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