Technical advisory group keeps NFPA 13 requirement for 4–6‑story single‑exit multiplexes after vote; fire‑alarm, escape and department criteria discussed

The Single‑Exit Multiplex Housing Technical Advisory Group voted Oct. 7 to retain a proposed requirement that four‑, five‑ and six‑story single‑exit apartment buildings be protected by a full NFPA 13 sprinkler system, and spent most of the meeting hashing out fire‑alarm, smoke‑detection, emergency‑escape and professional fire‑department conditions that would need to accompany any allowance for single‑exit construction.

The group debated whether to let jurisdictions allow NFPA 13R (a lighter “residential” sprinkler standard) on four‑story single‑exit buildings or require full NFPA 13 for any building of four stories or higher. A motion to strike the draft provision requiring full NFPA 13 for four‑ through six‑story buildings (mover: Spencer Gardner; second: Derek Quagle) failed at roll call, leaving the draft text intact. The group’s discussion also covered manual and automatic fire alarm requirements, occupant notification tied to sprinkler water flow and whether in‑unit smoke alarms should be permitted to interconnect to the building fire alarm control panel.

Why it matters: single‑exit designs remove the redundant egress path used in conventional apartment buildings. Fire officials and the advisory group said that if a jurisdiction permits single‑exit buildings, the buildings’ fire‑safety systems and the responding fire department must be able to compensate for the lost redundancy to protect life and property.

Fire alarms and detection

Fire‑safety presenters urged the group to close a gap that exists in baseline code language: where a sprinkler water flow is monitored by a fire‑alarm panel but the building lacks occupant notification devices, occupants are not alerted automatically when a sprinkler activates. Mike Messer (fire group presenter) said the draft closes that gap by requiring an alarm panel that monitors sprinkler water flow and initiates occupant notification—horns and strobes—when a sprinkler or a pull station…