We have a project that is adding onto an existing building. Archives and history wants a glass connector between the old and new. However, that is where we need a fire wall due to allowable area limits. If we extend the fire wall 4-ft plus 18" beyond the new building's exterior walls, that abut the fire wall perpendicular, will that eliminate the 1-hour fire rating required for exterior walls that are less than 180-degrees from a fire wall? [ref: 2012 IBC Section 705.5.1].
Both buildings will have an automatic fire suppression system. Both buildings have pitched roofs. The existing building has a wood framed roof system. The new addition will have non-combustible roof system. We plan on protecting the existing roof to 4-ft beyond the fire wall horizontally and the other roof is non-combustible [ref 706.5 two exceptions]. Exterior walls of both buildings are non-combustible.
Both buildings will have an automatic fire suppression system. Both buildings have pitched roofs. The existing building has a wood framed roof system. The new addition will have non-combustible roof system. We plan on protecting the existing roof to 4-ft beyond the fire wall horizontally and the other roof is non-combustible [ref 706.5 two exceptions]. Exterior walls of both buildings are non-combustible.
