Access covers for tunnel installation

"Tunnel covers" are designed to meet the specific criteria prescribed for installation inside tunnels such as: easy installation/exchange/operation and conforming to the fire protection regulations. They come in stainless steel or hot-galvanized mild steel filled with concrete.

Product description:

Cable duct cover for installation in tunnel berms and footwalks
In conformity with DIN EN/124, class B 125, static computation as per DIN 1072, dimensioned as per DIN 1055 (passable by passenger cars)
Optionally: class D 400, static computation as per DIN 1072/SLW60 (passable by trucks)
Dimensions as per customers requirements
Frame and cover made of stainless steel mat. grade 1.4571 (AiSi 316) and conforming to (German) ZTV-ING, part 5
Cover with concrete surface of nonskid class "R12"
Single or double leaf cover units with overhead seal - w/o cross beam
Surface-watertight
With locking devices NW VK 17 (width across bolt head flats 17 mm), with plastic caps and chambered key holes
Optionally: with Telekom lifting chambers or threaded lifting holes
Complete cover system designed to meet fire protection class F 90 (90min. tightness against egress of smoke and resistance to open fire from above and from below)
Successfully tested as per DIN 1363 by "MPA" Dresden (an independent material test institute)
Guaranteed protection of cable cords E 90 (RABT 2006 point 7.3.4)
Cover raisable by 60 mm
With perma-elastic encircling sealing strip as protection against top concrete
All stainless steel elements pickled and passivated
Verifiable static computation

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