MKALLAY
Registered User
I am looking at a project where a lot line along one side of a building jogs so that a portion of the wall will be less that 10' from the line, but the remainder of the wall is greater than 10' from the line (measured perpendicular from the wall). For the construction type IIb, a 1 hour fire resistance rating is required when the fire separation distance is less than 10'. Does the required fire resistance rating apply to the entire wall in that plane, or need it only apply to the portion of the wall that has less than 10' fire separation distance?