FloAire Pyroscat Enclosure - Manual (Page 55)

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Page 54 P029_02:2014
Fire Rated Enclosure
Installation Technique and Design
Advisory Manual
2102 Old Savannah Road, Augusta, GA Reproduced Courtesy of Underwriters Laboratories Inc.
www.morganthermalceramics.com Created or Modified July 20, 2011
Technical Support:
(706) 796-4306
[email protected]
W-J-7086
Page 1 of 1
System No. W-J-7086
ANSI/UL1479 (ASTM E814)
L Rating At Ambient - Less Than 1 CFM/sq ft F Rating - 2 Hr T Rating – 2 Hr
L Rating At 400 F - Less Than 1 CFM/sq ft
1. Floor or Wall Assembly — Min 6 in. (152 mm) thick reinforced lightweight or normal weight (100-150 pcf or 1600-
2400 kg/m 3 ) concrete. Wall may also be constructed of any UL Classified Concrete Blocks*. Max area of opening is 78
ft.2 (7.3 m 2 ) with a max dimension of 107 in. (272 cm). See Concrete Blocks (CAZT) category in the Fire Resistance
Directory for Mfgs.
2. Steel Air Duct — One steel duct to be installed within the firestop system. Duct to be rigidly supported on both sides of
wall assembly. Min 26 gauge (0.5 mm) galv steel duct having a max perimeter dimension of 400 in. (0.274 m) and a max
individual dimension of 100 in. (762 mm).
3. Firestop System — The firestop system shall consist of the following:
A. Duct Wrap Materials* — Nom 1-1/2 in. (38 mm) thick blanket totally encapsulated within foil-scrim facers. The
steel air duct shall be wrapped with one layer of duct wrap installed in accordance with Ventilation Assembly Nos. V-
1 or V-19. See Ventilation Duct Assemblies in Vol. 2 of the Fire Resistance Directory. When steel angles (Item 3D)
are used, the edges of the duct wrap material are to abut the protruding leg of the angle and the tight seam is to be
covered with an additional 6 in. (152 mm) wide "collar" of duct wrap. The annular space between the insulated duct
and the periphery of the opening shall be min 0 in. (0 mm, point contact) to max 2 in. (51 mm).
THERMAL CERAMICS INC — FireMaster FastWrap XL and FastWrap+ or Pyroscat Duct Wrap XL
B. Packing Material — Min 4-3/4 in. (121 mm) thickness of unfaced scrap duct wrap material or min 4 pcf (64 kg/m 3 )
mineral wool batt insulation firmly packed into the opening as a permanent form. Packing material to be recessed
from both surfaces of wall as required to accommodate the required thickness of fill material (Item 4B). When steel
angles (Item 3D) are used, packing material shall be firmly packed into opening as a permanent form between the bare
steel duct and the periphery of the opening.
C. Fill, Void or Cavity Material*— Sealant — Min 5/8 in. (16 mm) thickness of fill material applied within annulus,
flush with both surfaces of wall assembly. A min 1/4 in. (6 mm) diam bead of sealant shall be applied at the concrete
wall/insulated duct interface on both surfaces of wall assembly.
SPECIFIED TECHNOLOGIES INC — SpecSeal 100, LC150, LCI Sealant, or Pensil 300 Silicone Sealant
D. Retaining Angles — (Not Shown) — When dimensions of duct exceed 84 by 84 in. (213 by 213 cm), min No. 16
gauge (0.059 in. (1.5 mm)) galv steel angles sized to lap steel duct a min of 2 in. (51 mm) and to lap wall surfaces a
min of 1 in. (25 mm). Angles attached to steel duct on both sides of wall within 1 in. (25 mm) of wall with min No. 10
by 1/2 in. (13 mm) long steel sheet metal screws or welds located a max of 1 in. (25 mm) from each end of steel duct
and spaced a max of 6 in. (152 mm) OC.
*Bearing the UL Classification Mark
P029_Install_PS_2 2014.indd 54 2/28/14 9:23 AM