LIFE SAFETY ISSUES
HEATING, VENTILATING, AND AIR CONDITIONING REVIEW
SMOKE AND FIRE PROTECTION
See smoke control flow diagram for air handling units. Note requirements for unit sizes exceeding 56 m3 /min (2,000 CFM) and 420 m3 / min (15,000 CFM).
Unit > 56 m3 / min (2,000 CFM): Provide a smoke detector in main supply duct
Unit > 420 m3 / min (15,000 CFM), and the system serves more than one story: Provide a smoke detector in each return branch at each floor in addition to a detector in supply main; Isolate unit by providing smoke dampers in the supply and return air ducts only if it serves more than one floor.
Para 2.13.4 and Para. 2.13.2
Show control diagrams for control of smoke dampers with smoke detectors.
VA Standard Detail 15902 - 34 DWG
No duct mounted smoke detectors or smoke dampers required when crossing a smoke barrier in a fully sprinkled building with quick response sprinklers,
Para. 2 .13.2.5
Pressurization of stairwells is not required.
NFPA 45 does not permit fire dampers in Laboratory fume hood exhaust. Provide a separate fire rated shaft from each fire zone to reach top of the building.
Provide smoke venting for elevator shafts. When standby power is connected to an elevator, NFPA 101 requires the machine room ventilation/air conditioning system also to be connected to standby power.
VA Standard Detail 15902 –32 DWG