The Fire Sprinkler Scope of work consists of changing the standard response sprinklers to quick response sprinklers on the third floor. The existing pipe sizes are reported as 4”, 2” mains and 1¼" branch lines. The system was ONLY review for this scope of work.


Building Department Scope:

(BOISE CITY NATIONAL BANK BUILDING - CORE REMODEL) (8-18-10 PLAN MODIFICATION TO INSTALL AN EXTERIOR ENTRANCE DOOR FROM THE 1ST STORY MAIN ENTRANCE COMMON LOBBY TO THE OUTSIDE AT IDAHO STREET. THE DOOR WILL BE RECESSED SO THAT IT WILL NOT SWING INTO THE PUBLIC WAY. WORK INCLUDES EXTERIOR WALLS WITH R-13 INSULATION AND AN EXTERIOR STUCCO SYSTEM. THE EXTERIOR CANOPY IS NOT COVERED UNDER THIS PERMIT.) The fire sprinkler system substitutes for the 1-hr fire-resistance-rating of the building structure. To remodel the core areas within an existing 5 story building (basement, 4 stories above grade plane, and enclosed mezzanine above the 4th story). Work is to include an interior non-fire-resistance-rated exit discharge on the ground floor to serve an existing stairway enclosure, a non-fire-resistance-rated corridor on the 2nd story to connect stairway enclosures, new suspended ceilings within some core areas, and new finishes in existing restrooms. Two new doorways will be created in existing masonry walls. Steel headers and trimmers will be provided. Common restrooms on the 1st story, 2nd story, 3rd story, and 4th story are required to be accessible to the disabled as defined by current standards, unless technically infeasible. Upgrades will be done where necessary to ensure compliance to the maximum extent possible. The work is required to comply with the approved drawings, with the plan review report, and with all applicable codes and ordinances. Some of the trade-offs permitted because this building is fully fire sprinklered are (1) egress from an enclosed stairway is allowed through an interior non-fire-resistance-rated lobby on the ground floor and (2) non-fire-resistance-rated corridors are allowed on all levels. The fire sprinkler system is required to comply with NFPA 13 as regulated by the Fire Department. Existing fire sprinkler heads will be replaced with quick-response sprinklers in the future on a floor by floor basis as allowed by the Fire Department. **CJW**