Where should a spot type detector be installed when a smoke damper is above smoke barrier doors?

The correct placement for a spot type detector when a smoke damper is located above smoke barrier doors is on one side of the smoke barrier door opening. This positioning allows the detector to effectively sense smoke that may accumulate or pass through the opening when the smoke damper activates. Placing the detector in this location ensures that it can respond to smoke originating from either side of the barrier, enhancing the overall safety and functionality of the smoke control system.

When considering other placement options, positioning the detector on both sides of the smoke barrier door opening could lead to redundancy without providing additional benefit, as one well-placed detector can cover the necessary area. Locating the detector in the center of the smoke barrier door opening may not be effective, as it could miss smoke that travels up or down before entering the opening. Installing the detector at the bottom of the smoke barrier door opening might also be ineffective, as smoke typically rises, and the detector may not activate until a significant amount has already built up. Thus, the chosen installation on one side optimally balances sensitivity with practical considerations for smoke detection near the damper.