User Manual

35
Siemens Switzerland Ltd
Building Technologies Division
Figure 16 Exit route sign
The problem with this type of sign is that they may not be easily visible in smoky
conditions. For this reason the concept of way guidance is becoming more
widespread in new buildings.
Way guidance To complement emergency escape signage, way guidance equipment can be
very useful in helping people to follow exit routes. Way guidance systems usually
consist of photo luminescent material, lines of LEDs, or strips of miniature
incandescent lamps, forming a continuous marked escape route at a lower level
(e.g. handrail or floor). These systems have proved particularly effective when
visibility is already affected by smoke. Such technology can easily be integrated
into modern museums or libraries; however some degree of ingenuity will be
required to overcome the aesthetic restrictions imposed in the majority of
historical buildings. One example may be photo-luminescent strips in carpeting
or along handrails.
Emergency lighting The primary purpose of emergency escape lighting is to illuminate the escape
routes, but it can also be helpful in illuminating other safety equipment.
Following a power failure the emergency lighting should automatically switch on
within 5 s. The size and type of the premises and the risk to the occupants will
determine the complexity of the emergency lighting required.