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// CODE SNIPPET

504.3.16 Multistory Common Vents Offsets

NYC Fuel Gas Code 2014 > 5 Chimneys and Vents > 504 Sizing of Category I Appliance Venting Systems > 504.3 Application of Multiple Appliance Vent Tables 504.3(1) Through 504.3(7) > 504.3.16 Multistory Common Vents Offsets
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Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply with all of the following:
  1. The offset angle shall not exceed 45 degrees (0.79 rad) from vertical.
  2. The horizontal length of the offset shall not exceed 11/2 feet for each inch (18 mm for each 25.4 mm) of common vent diameter of the segment in which the offset is located.
  3. For the segment of the common vertical vent containing the offset, the common vent capacity listed in the common venting tables shall be reduced by 20 percent (0.80 × maximum common vent capacity).
  4. A multistory common vent shall not be reduced in size above the offset.

Related Code Sections


504.3.15 Chimneys and Vents, Multistory Common Vent Offsets
Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply with all ...
NYC Fuel Gas Code 2008 > 5 Chimneys and Vents > 504 Sizing of Category I Appliance Venting Systems > 504.3 Application of Multiple Appliance Vent Tables 504 > 504.3.15 Multistory Common Vent Offsets
504.3.16 Chimneys and Vents, Multistory Common Vents Offsets
Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply with all ...
NYC Fuel Gas Code 2014 > 5 Chimneys and Vents > 504 Sizing of Category I Appliance Venting Systems > 504.3 Application of Multiple Appliance Vent Tables 504.3(1) Through 504.3(7) > 504.3.16 Multistory Common Vents Offsets
503.6.10 Chimneys and Vents, Multistory Prohibited
Common venting systems for appliances located on more than one floor level shall be prohibited ...
NYC Fuel Gas Code 2014 > 5 Chimneys and Vents > 503 Venting of Appliances > 503.6 Gas Vents > 503.6.10 Multistory Prohibited
503.6.10 Chimneys and Vents, Multistory Prohibited
Common venting systems for appliances located on more than one floor level shall be prohibited ...
NYC Fuel Gas Code 2022 > 5 Chimneys and Vents > 503 Venting of Appliances > 503.6 Gas Vents > 503.6.10 Multistory Prohibited
801.19 Chimneys and Vents, Multistory Prohibited
Common venting systems for appliances located on more than one floor level shall be prohibited, except where all of the appliances served ...
NYC Mechanical Code 2008 > 8 Chimneys and Vents > 801 General > 801.19 Multistory Prohibited
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