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DUCT ACCESSORIES <br />Section 15910 <br />15-1207 <br />FHC 25/50. Doors shall have a minimum R -value of 4.0 total. Access doors shall be <br />pressure rated for 20" WG positive and 10" WG negative with no leakage. <br />5. Access doors into ductwork greater than 2" w.g. pressure class shall be <br />side -mounted equal to Nailor Series 0800 for rectangular ducts and Nailor Series <br />0895 for round ducts. Access doors shall be tested at 8 -inch static pressure. Access <br />door height shall not be less than 75% of duct height. <br />6. Identification: Access doors shall be permanently identified on the exterior by a label <br />with letters not less than 1/2 inch in height reading: SMOKE/FIRE DAMPER or FIRE <br />DAMPER. <br />C. 2" w.g. pressure class or less: <br />Un -insulated round ducts: Nailor model 0890, or equal. <br />a. 16 -gauge galvanized steel. <br />b. Door hinge with Strike and catch, zinc plated steel and gasket. <br />2. Insulated round ducts: Nailor model 0890, or equal. <br />a. 16 -gauge galvanized steel. <br />b. Door hinge with Strike and catch, zinc plated steel and gasket. <br />3. Rectangular ducts: Nailor model 08SH, or equal. <br />a. 16 -gauge galvanized steel. <br />b. Door hinge with Strike and catch, zinc plated steel and gasket. <br />C. Where space does not allow hinged access door, provide Nailor model <br />08SCL, or equal. <br />2.07 FLEXIBLE CONNECTIONS <br />A. Furnish and install flexible connections at following locations: <br />1. Duct connection of supply fan <br />2. Duct connection of return fan <br />3. Duct connection of exhaust fan <br />4. All AC Units mounted on a seismic / spring curb. <br />5. Elsewhere as shown on Drawings. <br />B. Flexible duct connections shall be preassembled flexible connectors constructed of coated <br />glass fabric applied in accordance with manufacturer's recommendations. <br />C. Install sheet metal band completely around duct or fan outlet, at end of flexible connection. <br />Fasten with metal screws through band and coated glass fabric. Space screws <br />approximately 4" apart. <br />1. Provide with TDC/TDF connectors where connecting to like ductwork. <br />D. Flexible Connections to be as follows: <br />For all equipment: Duro-Dyne Model Metal Fab, or equal. <br />a. Provide with Neoprene (commercial/specification grade) fabric. <br />(1) Neoprene to be 30 oz./square yard, <br />b. Provide with 4" fabric with 4" metal connectors on each end. <br />0 <br />