Fire and Life Safety
Fire and Life Safety
This domain tests passive and active fire protection in interiors: rated walls, floors, and ceilings; opening protectives; firestopping; joint systems; smoke barriers; and the inspection and labeling that keep a listed system valid.
Core rules
- A fire-resistance rating is established by ASTM E119 or UL 263. The rating belongs to the complete assembly, including studs, boards, insulation, fasteners, and joints.
- Penetrations through rated assemblies require a listed firestop system tested to ASTM E814 or UL 1479. The system has an F rating (flame) and, where required, a T rating (temperature). The annular space, backing, sealant, and pipe material must match the listing.
- Fire doors and frames are controlled by NFPA 80 and the label. Do not field-modify a labeled door, cut the frame, or change the hardware without evaluating the label.
- Smoke barriers and smoke partitions have different requirements; smoke barriers generally need a 1-hour rating and smoke leakage control.
- Fire and smoke dampers must be listed, installed per the manufacturer, and inspected; access panels are required where dampers are concealed.
Worked example
A 2-hour rated corridor wall is penetrated by a 4 in. PVC drain. The contractor seals the annular space with generic intumescent putty. The inspection should fail: PVC collapses in a fire, so the firestop must be a listed system that includes an intumescent collar or wrap and a sealant tested for that pipe diameter and wall type. The system must provide an F rating of at least 2 hours and a T rating if the assembly requires it. The fix is to install the listed system, label it, and document the system number.
Traps
- Using one firestop product for every pipe material and diameter.
- Forgetting the T rating where required.
- Propping a fire door open or removing a closer.
- Concealing a damper without an access panel.