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USACE / NAVFAC / AFCEC / NASA UFGS-23 31 13.00 40 (August 2022)
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Preparing Activity: NASA Superseding
UFGS-23 31 13.0
0 40 (May 2016)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated October 2022
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SECTION TABLE OF CONTENTS
DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)
SECTION 23 31 13.00 40
METAL DUCTS
08/22
PART 1 GENERAL
1.1 REFERENCES
1.2 SUBMITTALS
1.3 QUALITY CONTROL
PART 2 PRODUCTS
2.1 SYSTEM DESCRIPTION
2.1.1 Design Requirements
2.2 COMPONENTS
2.2.1 Round Sheet Metal Duct Fittings
2.2.1.1 Fittings Construction
2.2.2 Round, High-Pressure, Double-Wall Sheet Metal Ducts
2.2.3 Reinforcement
2.2.4 Fittings
2.2.5 Turning Vanes
2.2.6 Dampers
2.2.7 Sound Attenuators
2.2.7.1 Attenuation
2.2.7.2 Construction of Sound Attenuators
2.2.8 Flexible Connectors for Sheet Metal
2.2.9 Duct Hangers
2.2.10 Mill-Rolled Reinforcing and Supporting Materials
2.2.11 Flexible Duct Materials
2.2.12 Manual Volume Dampers
2.2.12.1 Damper Construction
2.2.13 Gravity Backdraft and Relief Dampers
2.2.13.1 Blade Construction
2.2.14 Power-Operated Dampers
2.2.15 Fire Dampers and Wall Collars
2.3 MATERIALS
2.3.1 Galvanized Steel Ductwork Materials
2.3.2 Brazing Materials
SECTION 23 31 13.00 40 Page 1
