Fire Code Offsets For Detached Structures

[Ctay005]

We've been designing quite a few PV systems on detached structures recently (shops, garages, etc.) and I thought I might of seen somewhere that detached structures (esp those that arent inhabited) dont follow the same 3' fire code offsets that are required on residential buildings. Ive tried to find it in the code but so far I havent come across anything. Does anyone know if this is true or am I just mistaken?<br>

 

[jaggedben]

We've been designing quite a few PV systems on detached structures recently (shops, garages, etc.) and I thought I might of seen somewhere that detached structures (esp those that arent inhabited) dont follow the same 3' fire code offsets that are required on residential buildings. Ive tried to find it in the code but so far I havent come across anything. Does anyone know if this is true or am I just mistaken?<br>

It's true in California and I can tell you where it is in the California codes, but I can't promise you that Utah or anywhere else has the same rules.

California defines Group U structures ('U' for utility') and exempts them from the fire paths in both the residential and fire codes. The exception does not apply to habitable structures.

 

[c_picard]

Utah has adopted amendments to the IFC and IRC.

Regardless, setbacks only apply to R-3 dwellings.

Fun fact - Setbacks aren't actually in the 2015 IRC, that was a misprint and was deleted via errata.

 

[shortcircuit2]

I think some regulations are in NFPA 1 2012 Edition in Chapter 11...see section 11.12.2.2.3.1 for other than 1 or 2 family dwellings and townhouses. It states a 4ft clearance at roof edges.

This section is not applicable in Massachusetts. Massachusetts deleted many solar restrictions in NFPA 1 under the previous administration. We will see where it lands in the next edition.

 

[c_picard]

I think some regulations are in NFPA 1 2012 Edition in Chapter 11...see section 11.12.2.2.3.1 for other than 1 or 2 family dwellings and townhouses. It states a 4ft clearance at roof edges.

This section is not applicable in Massachusetts. Massachusetts deleted many solar restrictions in NFPA 1 under the previous administration. We will see where it lands in the next edition.

Chapter 3 in the IRC, 6 in the IFC. States adopt either the IFC or NFPA 1, never both. Utah goes with the I-codes.