UFC 3-600-01
17 April 2003
with change 16 January 2004
2-11.2
Corridors. Egress corridors must not be used as a portion of a
supply, return, or exhaust air system serving adjoining areas. Air transfer
opening(s) must not be permitted in walls or in doors separating egress corridors
from adjoining areas.
Exception: Toilet rooms, bathrooms, shower rooms, sink closets,
and similar auxiliary spaces opening directly onto the egress corridor.
2-11.3
Plenums. Plenums may be used as an integral part of an air
handling system only if they conform to the requirements of NFPA 90A. Under
no circumstances may combustible materials be located within the plenum
space. Electrical wiring passing through the space, including telephone and
communication wiring, must be approved for that type of environment or must be
in metal conduit. Rooms or areas which form a plenum space or which are used
as a plenum must not be occupied for any purpose except during repairs or
maintenance operations to the air handling equipment.
2-11.4
Smoke and Heat Vents. Smoke and heat vents may be
considered in buildings where a high rate of heat release is anticipated during a
fire. In buildings without automatic sprinklers, smoke and heat vents must be
arranged to operate automatically in accordance with NFPA 204, Smoke and
Heat Venting. In buildings with automatic sprinkler protection, smoke and heat
vents must be arranged to operate in the manual mode only. Skylights are the
preferred method of providing manual smoke and heat vents.
2-12
PLASTIC PIPE AND CONDUIT.
2-12.1
Penetrations. Penetrations by plastic pipe or conduit through fire-
rated walls, partitions, shafts, and floors must be fire-stopped by an approved or
listed method in accordance with ASTM E814, Standard Test Method for Fire
Tests of Through-Penetration Fire Stops or UL 1479, Fire Tests of Through-
Penetration Firestops.
2-12.2
Prohibited Locations. Plastic pipe and conduit must not be
installed in exit stair enclosures, or in air plenum spaces unless specifically listed
for that application.
2-13
FIRE RETARDANT TREATED (FRT) PLYWOOD.
2-13.1
New Construction. Use of FRT plywood is prohibited, except as
permitted by the IBC. FRT plywood must not be used in any part of the roof or
roofing system.
2-13.2
Existing Construction. FRT plywood installations should be
regularly inspected for structural integrity. Replacement of damaged FRT
plywood may require additional fire protection measures if FRT plywood is
replaced with more combustible materials.
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