Horizontal in Floor Slab Sleeve & Angle (S&A)


Damper Installation Method

  1. Position and fix the unistrut supports to the underside of the slab, at either end using M10 fire rated fixings - leave some clearance between unistrut supports, so the damper and duct section can be lowered in easily.
  2. Fix perimeter steel angles to the underside of the slab, which support the Ablative Batts, with M10 fire rated fixings
  3. Fix section of duct to the damper spigot on the Access side, (if the actuator is located upwards).
  4. Lower the damper and duct section into and onto the supporting unistrut sections, making sure you allow sufficient space to fit the required motor / actuator, (if required).
  5. Make sure the area within the aperture and the damper casing is free from any debris and remove any dust.
  6. Where the coated Batt contacts the surrounding aperture, damper casing and flange, or where two coated Batts are in contact, use Rockwool fire pro glue as the adhesive. 
  7. Continue installation of Rockwool ablative coated BATT, until aperture is completely filled.
  8. Ablative coated batt is not intended for maintaining the load bearing capability of the floor. Suitable precautions such as adequate safety rail and signage should be adopted to raise awareness and potential accidents.
  9. The damper requires suitable support on the floor side, by others.

Actuator Fitting (If required)

  1. The control mode/actuator should then be fitted using the instructions supplied with it.
  2. Using the supplied drilling template, drill into the ductwork and fit the Electrical Thermal Release (ETR) into the duct (as good practice, this should be towards the top of the duct).
  3. A special feature of the actionair SmokeShield modes is that they may be adjusted from pointing straight out along the duct (standard configuration) through 90° to point either up or down if required.
  4. The mode should be wired into the system using the site wiring detail, plus the details shown on the label. Note: If the mode/actuator fitting instructions are missing, please contact the actionair sales office.


The procedure detailed under periodic maintenance should be followed.

Periodic Maintenance

See periodic maintaince.


  1. The manually resettable fire damper should be carefully inspected, cleaned and lubricated with light oil, if required, released and reset.

  2. The motorised fire damper control mode should be operated to ensure that it is moving the blades from open to close and vice versa.

  3. If the end switches (in the control mode) are being used, it must be checked at commissioning stage that they are actually indicating that the blades are open or closed. If using an automatic control system this can be achieved by running a test cycle and checking the blades (open and closed) and the status indication at the control system. 

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