أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
There are a few reasons why it isn't safe to use an elevator during a fire. The first is that fire can short-circuit the elevator call button on the fire floor and therefore cause the elevator to stop at that floor. Obviously not good. Also, an elevator shaft provides a natural chimney. As such it can quickly fill with smoke. You don't want to be trapped in a small metal box in a smoke chocked elevator shaft. If power is lost or is cut while you are in the elevator then you are stuck there. Consider too that eveyone in the building is trying to evacuate at the same time. An elevator is a terribly inefficient way to evacuate a building. You can only fit a small number of people at a time and the elevator will then stop at every floor the button has been pressed on its way to the ground floor. Last but not least if the fire is above the tenth floor the fire department will need the elevator to shuttle personnel and equipment from ground level up to an advance command post, probably two floors below the fire.
main reason not to use elevator is, elevator shaft will become like a suction shaft , fire will rush through this shaft as a result of suction force, i think we should all also include this point,
secondly electrically failure will definitely make scenario worse
Because of many reasons, most importantly is that the elevator shaft will accumulate smoke, and electrical cut could occur at anytime, which could cause major injuries and suffocation incidents.
There are a number of reasons, and here are the top three:
1. A person could be trapped inside the elevator if power was cut off
2. A person can suffocate inside the elevator, in addition to the elevator shaft should could quickly get filled with smoke
3. Elevator structure integrity is doubtable, depending on the fire location
There are a few reasons why it isn't safe to use an elevator during a fire. an elevator shaft provides a natural chimney. As such it can quickly fill with smoke. You don't want to be trapped in a small metal box in a smoke chocked elevator shaft.
In a simply understanding way without complication, following are the main reasons
1.The lift may open onto the fire.
2.The lift may stop.
3.Smoke and fumes will enter the lift.
4.The lift may be grounded
In the event of fire sure power will be cut off and elevator start decend via emergeny landing device(Which is backup by UPS) and it will stop on the ground floor (depend on th program configure in elevator control panel). Secondary when elevator is running a presure of air is built in the shaft which may chance to spread of fire and smoke and the both can enter in the lift cabin also. Fire manlift is design with some special features in which smoke and fire guard is there due to that flame and smoke cannot enter in the lift cabin. This is only for fire rescue team.