TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
A. All duct joints shall be sealed with EPA 181 approved materials to minimize air leakage. Duct
joints shall be sealed with hardcast #1402 Rolled Duct sealant. Install in accordance with
manufacturer’s recommendations.
2.7 DUCT INSULATION
A. Refer to Section 15250, INSULATION (INSULATION SCHEDULE) for insulation requirements.
2.8 FLEXIBLE DUCTWORK
A. Provide round corrugated aluminum duct with exterior fiberglass insulation of 1 inch x 1 lb/cu.ft.
and a vinyl film vapor barrier. Maximum working pressure 10 inches of water column positive or
negative. Entire flexible duct assembly shall be UL listed. Flexible ductwork shall be Clevaflex
Type SFV or similar by Flexmaster.
B. Flexible ductwork shall be joined to the main trunk duct through sheet metal fittings. Fittings shall
be constructed of galvanized steel and be equipped with a factory installed volume damper having
positive locking regulator. Fittings installed in lined ductwork shall have insulation guard.
C. Fittings shall be Clevaflex SPIN-COLLAR DSC, or similar by Acme Manufacturing Co.
2.9 VOLUME DAMPER
A. Provide damper with 16 gauge (minimum) galvanized steel frame and blades, 1/2 inch diameter
plated steel axles and control shaft, nylon bushings, opposed blade action, and hand quadrant or
adjustment rod and screw.
B. Volume Damper shall be as indicated on the Drawings and shall be Greenheck MBD-15 or similar
by Penn Ventilator or Ruskin.
2.10 TURNING VANES
A. Airfoil turning vanes shall consist of curved galvanized steel vanes and side rails arranged to
assure that any point on one blade is equal distance from the same point on the adjacent blade.
Install with screws or rivets. Duct shall be free of vibration and noise when system is in operation.
B. Double thickness airfoil turning vanes shall be installed at square and abrupt turns in duct.
C. Turning vanes shall be Aero/Dyne or equal.
2.11 DUCT ACCESS DOOR
A. Door shall be constructed of 24 ga. galvanized, sheet metal, with tight closing cam lock latches,
gasketed lip, 1 inch neoprene coated fiberglass insulation, and hinged with removable hinge pins.
Door size shall be 12 inch x 12 inch (minimum) to allow for adjusting, repairing or replacing
equipment.
B. Provide insulated access doors as shown on the Drawings and as required for duct cleaning and
for access to automatic dampers, volume dampers, coils, thermostats, temperature controllers,
valves, filters, and other concealed equipment requiring inspection and service in the duct system.
AIR DISTRIBUTION 15800-4