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Method to maintain pressure in safety staircase esp. in tall buildings calculates pressure filed within building, taking into consideration unretentiveness, floor on fire, and losses at throttle flap, to secure access
Method to maintain pressure in safety staircase esp. in tall buildings calculates pressure filed within building, taking into consideration unretentiveness, floor on fire, and losses at throttle flap, to secure access
The staircase is reached from individual floors via safety locks with air pressure maintenance, the windows on all floors not affected by the fire are closed, and at least one window (3) in a fire-affected floor is opened. The staircase (1) is supplied with air via a ventilator (5). The pressure distribution in relevant areas of the building is calculated dependent upon position and construction of the floor on fire (4) and atmospheric conditions. Pressure is adjusted via a pneumatic or electric throttle flap (8) so that a pressure differential according to legal demands, is created at the lock (2) of the floor on fire, when the doors are closed. The pressure differential is 15-50Pa.
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