Wind pressure differentials in tall buildings affect smoke movement, door operation, and stairway pressurisation systems.. Wind and Fire Safety In tall buildings, wind pressures create significant challenges for fire safety systems. Key Effects Stack effect driving smoke movement through the building Wind induced pressure differentials affecting stairway pressurisation Door opening forces exceeding maximum for disabled occupants Broken glazing allowing external wind to accelerate fire growth Smoke logging of downwind stairways Engineering Solutions CFD modelling of wind fire interaction scenarios Variable speed pressurisation fans with wind compensation Lobby doors with hold open devices and automatic release Protected lobbies as buffer zones Full height compartmentation to limit stack effect For tall building fire engineering, contact us.