Ceiling Radiation Damper Installation Detail

X 11 2 in.

Ceiling radiation damper installation detail.

Minimum flanges located 1 inch to 3 inches from and on both sides of a steel duct drop and these channels are suspended by 12 swg wire from. Series 51sb read more. Ceiling radiation dampers. Let s examine the protection provided by each type of damper.

Ceiling fire dampers also known as radiation dampers are designed and tested to limit the radiant heat transfer through an air inlet outlet opening in the ceiling membrane of a fire resistance rated floor ceiling or roof ceiling assembly. Series 51sb in a boot true truss. A 12 x 12 305mm x 305mm nominal ceiling radiation damper could have a maximum ceiling membrane opening of 13 x 13 330mm x 330mm. Static ceiling radiation dampers models mrcd mscd mscdsb mccd ceiling radiation dampers covered under ul 555c intended for installation in hourly rated fire resistive floor ceiling and roof ceiling assemblies in accordance with the standard for fire tests of building construction and materials ul 263.

5 ceiling radiation dampers dampers supported from ductwork above note about support when main ducts are supported by 16 ga. A complete line of damper products for fire and smoke control in life safety systems and for airflow control in commercial hvac and industrial systems. Life safety products protect the openings in walls ceiling floors and or partitions to prevent the spread of fire and or smoke. 2 ceiling radiation damper may be connected directly to the grille and supported by hanger straps see detail e or note.

They are used to protect hvac openings in fire rated horizontal ceiling assemblies. Opening in ceiling membrane see page 1 may be up to 1 25mm larger than the nominal size of the ceiling radiation damper i e. When it is necessary to install the ceiling damper more than 3 3 4 from the finished ceiling an additional application of. The ceiling damper shall be attached to a minimum 22 gauge 0 85 steel sleeve duct drop by welding or with rivets or with 10 m5 sheet metal screws or with quick lock or bolted.

Steel channels with 9 16 in. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly. A ceiling radiation damper closes automatically to restrict the passage of heat. Ceiling radiation dampers are available in butterfly style and curtain style.

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