Smoke Control in High-Rise Residential Buildings with Stair Pressurization Systems

Stair pressurization systems are designed to create a smoke-proof barrier, preventing the ingress of smoke into staircases within buildings. In tall buildings over 25 m, evacuation strategies can utilize phased or simultaneous evaluation multiple storeys. This paper examines performance stair with differing number doors open starting from two doors, an incremental step up total 10 shaft. Simulations using Fire Dynamics Simulation (FDS) have shown that system would pass commissioning requirements allows in shaft if there more than four simultaneously. The required airflow prevent was found be above average flow speed 0.7 m/s. Past this limit, amount leaks continues increase as open. study suggests standards regarding should updated account for realistic scenarios, including system’s cascade settings, storeys, and expected time, evidenced by leakage once were drop-in rate between two-door four-door cases.