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// CODE SNIPPET

M1601.3.1 Joints and Seams

2010 Residential Code of NY > 16 Duct Systems > M1601 Duct Construction > M1601.3 Installation > M1601.3.1 Joints and Seams
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Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing or other approved closure systems. Closure systems used with rigid fibrous glass ducts shall comply with UL 181A and shall be marked "181A-P" for pressure-sensitive tape, "181 A-M" for mastic or "181 A-H" for heat-sensitive tape. Closure systems used with flexible air ducts and flexible air connectors shall comply with UL 181B and shall be marked "181B-FX" for pressure-sensitive tape or "181B-M" for mastic. Duct connections to flanges of air distribution system equipment or sheet metal fittings shall be mechanically fastened. Mechanical fasteners for use with flexible nonmetallic air ducts shall comply with UL 181B and shall be marked 181B-C. Crimp joints for round metal ducts shall have a contact lap of at least 11/2 inches (38 mm) and shall be mechanically fastened by means of at least three sheet-metal screws or rivets equally spaced around the joint.

Related Code Sections


M1601.3.1 Duct Systems, Joints and Seams
Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing or other approved closure systems. Closure systems ...
2010 Residential Code of NY > 16 Duct Systems > M1601 Duct Construction > M1601.3 Installation > M1601.3.1 Joints and Seams
603.9 Duct Systems, Joints, Seams and Connections
Longitudinal and transverse joints, seams and connections in metallic and nonmetallic ducts shall be constructed as specified in SMACNA HVAC Duct ...
2020 Mechanical Code of NYS > 6 Duct Systems > 603 Duct Construction and Installation > 603.9 Joints, Seams and Connections
603.9 Duct Systems, Joints, Seams and Connections
All longitudal and transverse joints, seams and connections in metallic and nonmetallic ducts shall be constructed as specified in SMACNA HVAC Duct ...
2010 Mechanical Code of NY > 6 Duct Systems > 603 Duct Construction and Installation > 603.9 Joints, Seams and Connections
603.9 Duct Systems, Joints, Seams and Connections
All longitudinal and transverse joints, seams and connections in metallic and nonmetallic ducts shall be constructed as specified in SMACNA HVAC ...
Mechanical Code 2015 of New York State > 6 Duct Systems > 603 Duct Construction and Installation > 603.9 Joints, Seams and Connections
M1601.4.1 Duct Systems, Joints, Seams and Connections
Longitudinal and transverse joints, seams and connections in metallic and nonmetallic ducts shall be constructed as specified in SMACNA HVAC Duct ...
2020 Residential Code of New York State > 16 Duct Systems > M1601 Duct Construction > M1601.4 Installation > M1601.4.1 Joints, Seams and Connections
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