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// CODE SNIPPET

1613.6.8 HVAC ductwork with Ip = 1.5

Building Code 2009 of Alabama > 16 Structural Design > 1613 Earthquake Loads > 1613.6 Alternatives to ASCE 7 > 1613.6.8 HVAC ductwork with Ip = 1.5
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Seismic supports are not required for HVAC ductwork with Ip = 1.5 if either of the following conditions is met for the full length of each duct run:
  1. HVAC ducts are suspended from hangers 12 inches (305 mm) or less in length with hangers detailed to avoid significant bending of the hangers and their attachments, or
  2. HVAC ducts have a cross-sectional area of less than 6 square feet (0.557 m2).

Related Code Sections


1613.6.8 Structural Design, HVAC ductwork with Ip = 1.5
Seismic supports are not required for HVAC ductwork with I p = 1.5 if either of the following conditions is met for the full length of each duct ...
Building Code 2009 of Alabama > 16 Structural Design > 1613 Earthquake Loads > 1613.6 Alternatives to ASCE 7 > 1613.6.8 HVAC ductwork with Ip = 1.5
1301.6.7 Performance Compliance Methods, HVAC Systems
Evaluate the ability of the HVAC system to resist the movement of smoke and fire beyond the point of origin. Under the categories in Section ...
Existing Building Code 2021 of Alabama > 13 Performance Compliance Methods > 1301 General > 1301.6 Evaluation Process > 1301.6.7 HVAC Systems
6.4.4.2 Heating, Ventilating, and Air Conditioning, Ductwork and Plenum Leakage
Ductwork and all plenums with pressure class ratings shall be constructed to Seal Class A, as required to meet the requirements of Section 6.4.4.2.2 ...
Alabama Commercial Energy Code > 6 Heating, Ventilating, and Air Conditioning > 6.4 Mandatory Provisions > 6.4.4 HVAC System Construction and Insulation > 6.4.4.2 Ductwork and Plenum Leakage
3412.6.7 Existing Structures, HVAC Systems
Evaluate the ability of the HVAC system to resist the movement of smoke and fire beyond the point of origin. Under the categories in Section ...
Building Code 2009 of Alabama > 34 Existing Structures > 3412 Compliance Alternatives > 3412.6 Evaluation Process > 3412.6.7 HVAC Systems
620.3 Specific Appliances, Ductwork
Ducts shall not be connected to a unit heater unless the heater is listed for such installation ...
Fuel Gas Code 2021 of Alabama > 6 Specific Appliances > 620 (IFGC) Unit Heaters > 620.3 Ductwork
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