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// CODE SNIPPET

603.4.1 Minimum Fasteners

Mechanical Code 2018 of Maryland > 6 Duct Systems > 603 Duct Construction and Installation > 603.4 Metallic Ducts > 603.4.1 Minimum Fasteners
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Round metallic ducts shall be mechanically fastened by means of not less than three sheet metal screws or rivets spaced equally around the joint.
Exception: Where a duct connection is made that is partially inaccessible, three screws or rivets shall be equally spaced on the exposed portion so as to prevent a hinge effect.

Related Code Sections


603.4.1 Duct Systems, Minimum Fasteners
Round metallic ducts shall be mechanically fastened by means of not less than three sheet metal screws or rivets spaced equally around the joint ...
Mechanical Code 2018 of Maryland > 6 Duct Systems > 603 Duct Construction and Installation > 603.4 Metallic Ducts > 603.4.1 Minimum Fasteners
R703.3.3 Wall Covering, Minimum Fastener Length and Penetration
Fasteners shall have the greater of the minimum length specified in Table R703.3(1) or as required to provide a minimum penetration into framing ...
Residential Code 2015 of Maryland > 7 Wall Covering > R703 Exterior Covering > R703.3 Nominal Thickness and Attachments > R703.3.3 Minimum Fastener Length and Penetration
R703.3.4 Wall Covering, Minimum Fastener Length and Penetration
Fasteners shall have the greater of the minimum length specified in Table R703.3(1) or as required to provide a minimum penetration into framing ...
Residential Code 2018 of Maryland > 7 Wall Covering > R703 Exterior Covering > R703.3 Wall Covering Nominal Thickness and Attachments > R703.3.4 Minimum Fastener Length and Penetration
C103.5 Guidelines for the Wind Retrofit of Existing Buildings, Fasteners
the minimum length requirement shown in the figures and specified in the tables of this appendix. Fastener spacing shall meet the requirements of Section ...
Existing Building Code 2015 of Maryland > C Guidelines for the Wind Retrofit of Existing Buildings > C103 Materials of Construction > C103.5 Fasteners
2603.12.1 Plastic, Direct Attachment
Where cladding is installed directly over foam sheathing without the use of furring, cladding minimum fastening requirements to support the cladding ...
Building Code 2015 of Maryland > 26 Plastic > 2603 Foam Plastic Insulation > 2603.12 Cladding Attachment Over Foam Sheathing to Cold-Formed Steel Framing > 2603.12.1 Direct Attachment
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