The Fire and Rescue Service is adequately equipped to deal with most fires, including fires taking place at multi-storied buildings up to 18m high. However, buildings that have a height of more than 18 meter, need to be constructed with firefighting shafts provided along with fire mains. These fire mains take the form of dry or wet risers. The process of firefighting becomes difficult in case the building has a complicated design, and in that case, automatic sprinkler systems are put in place for fire protection.
A dry riser system can be installed in buildings with floors up to 50m above the Fire and Rescue Service access level.
The system consists of a two way inlet breeching connection into which the fire appliance can pump water. This fills the rising main so that water is available at landing valves in firefighting lobbies located at each floor level. Fire fighters can then attach their hoses to these outlets and tackle any fire from a secure bridgehead.
Wet riser systems are very similar to dry ones, except the fact that they are permanently charged with water. They come into their own where floors are over 50m above the Fire and Rescue Service access level and where supply pressures exceed those of the fire appliance.
A dedicated water supply for the wet riser system consists of a water storage tank and usually two fire pumps. With pressure regulated landing valves located in firefighting lobbies at each floor level, fire fighters can then tackle any fire from a secure bridgehead.