FloAire Pyroscat Enclosure - Manual (Page 57)

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Page 56 P029_02:2014
Fire Rated Enclosure
Installation Technique and Design
Advisory Manual
System No. W-L-7145
2102 Old Savannah Road, Augusta, GA Reproduced Courtesy of Underwriters Laboratories Inc.
www.morganthermalceramics.com Created or Modified July 20, 2011
Technical Support:
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W-L-7145
Page 2 of 2
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. or 1.5 mm thick) 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) shall be attached to steel duct. 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 56 2/28/14 9:23 AM