607.5 Where required.
MC § 607.5
Fire dampers, smoke dampers, and combination fire/smoke dampers shall be provided at the locations prescribed in Sections 607.5.1 through 607.5.7. Where an assembly is required to have both fire dampers and smoke dampers, combination fire/smoke dampers or a fire damper and smoke damper shall be provided. Exceptions: 1. Ducts 20 square inches (12 903 mm 2 ) or less passing through fire-resistance-rated assemblies other than fire walls shall not require fire dampers or smoke dampers.
2.Smoke dampers shall not be required to be located within a prescribed distance of a fire-rated enclosure and where isolation smoke dampers are used in air-handling equipment.













