AIR FOR SMOKE CONTROL.

This article reviews a major electrical control room fire which occurred at the Allegheny General Hospital in Pittsburgh, Pa. It is shown how the smoke moved via ″stack effect″ up the elevator shaft and stairwells as doors were opened for the evacuation and how to use and pre-plan the use of designed ″smoke control systems″ so that the engineered system is used under the real fire situation as planned to reduce both life risk and property losses.