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Specific requirements in these instruction are mandatory. These instructions meet the requirements of UL 555. Installation shall comply with the requirements of NFPA 90A (Standard for the Installation of Air Conditioning and Ventilating Systems) and UL Classification R13317. " Dampers up to a maximum size of 144 in. W x 96 in. H (3658mm x 2438mm) may be installed as illustrated below. Fire damper and sleeve assemblies 144 in. W x 96 in. H (3658mm x 2438mm) and smaller only require retaining angles on top of the concrete floor. Retaining angles must be installed on top of the floor and attached to the sleeve and the floor. Retaining angles must be attached to the sleeve. • Retaining angles must be a minimum of 16 gauge (1.5mm) steel and have a minimum of 11/2 in. x 11/2 in. (38mm x 38mm) legs. • Retaining angles must be attached to the sleeve using one of the methods shown below: • tack or spot welds • #10 sheet metal screws or 1/4 in. nuts and bolts •Retaining angles must be attached to the concrete floor using the method shown below: • Steel anchors or self tapping concrete screws penetrating concrete floor a minimum of 11/4 in. (32mm) • A minimum of two connections per side with a maximum spacing of 6 in. (152mm) on center • Retaining angles must overlap the floor a minimum of 1 in. (25mm) A = Damper B = Retaining Angle CONCRETE FLOOR GREENHECK P.O. Box 410 • Schofield, Wl 54476-0410 • 715.359.6171 *grBenheck.com Copyright © 2008 Greenheck Fan Corporation 468236 Single Side Retaining Angle-Horizontal Mount Rev.3 August 2008...
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