TUNNEL DOORS/ CROSS PASSAGE DOORS

Cross Passages are tunnels usually constructed between twin tunnel bores in rail, metro, and road tunnels to provide an alternative means of escape during emergencies or for operational maintenance purposes.

Tunnels have many uses: 

for mining ores, for transportation—including road vehicles, trains, subways, and canals—and for conducting water and sewage.

In twin-tube tunnels, links between the tubes known as “cross-bores” or “cross-passages” enable users to evacuate to a place of safety. Very often, these cross-passages are

only accessible to pedestrians and the geometrical characteristics of cross-passage doors must facilitate pedestrian access.

Some tunnels also have cross-passages that are accessible to emergency service vehicles.

The characteristics of cross-passage doors (reaction and resistance to fire, air tightness, thermal insulation, etc.) must be adapted to regulations in force and must be consistent

with the fire resistance performance of the structure surrounding the door.

Signs must be used to indicate the presence of cross-passage doors. They are usually illuminated for improved visibility and are located next to each door in the part of the

tunnel open to traffic. They must be visible from both sides of the door: upstream and downstream.

Additional signage may also be used, such as:

identical signs on the door itself,

signs on the side walls of the tunnel guiding the user to the nearest cross-passage door,

green paint surrounding the door.

BOQ FOR TUNNEL CROSS PASSAGE DOORS

• Doors: SITC of Fire doors, 120 minutes Fire Rated smoke tight insulated, ready–to–fit steel / composite door set (T-120), conforming to BS 476-4, BS 476-22, BS 5588, BS EN 13501-1, BS EN 13501-2, EN 1364-1, BS 5669 for fitting to brickwork/ concrete walls.

• Emergency Exit Doors (heavy duty) with an open section of 0.9 x 2.1 sq.m,/1.2x2.1 sq.m in RAL 6029 (Green frame) with lights made of Material GI 275 GSM AISI 316Ti or equivalent, located at motorable crossing galleries as per the relevant codes & standards, manufacturer specifications, and as per site requirement.

• Emergency Exit Doors (heavy duty double door) with an open section of 4.0 x 4.0 sq.m, RAL 6029 (Green frame) with lights made of Material GI 275GSM AISI 316Ti or equivalent located at motorable crossing galleries as per the relevant codes & standards, manufacturer specifications and as per site requirement. 

Emergency Exit Doors 4.0 x 4.0 sq.m shall be motorized.