Teckentrup installs fire doors under pressure

09/05/2022 | Print view

The doors at the individual stations must be particularly fire, sound and pressure resistant. In order to fulfil all values, Teckentrup developed a new door especially for this requirement profile.

In the underground, there is generally high pressure to allow the necessary air flow. In addition, the fire protection requirements are extremely high, as the escape routes are more demanding than above ground. For a project in the London Underground, Teckentrup has now developed special doors that exceed all requirements.

With the "Elizabeth Line“ – named, of course, after her late Majesty, Elizabeth II – a new rail line is being built in Greater London. The "Whitechapel" junction of the Elizabeth underground line extends over six levels to 30 metres below ground.

Special development by Teckentrup: Special doors were required for the special pressure ventilation areas. Teckentrup developed special constructions with 5 kPa pressure protection here - in order to guarantee the air flow into the station and the tunnels, as well as fire protection.

To meet the requirements for noise, pressure and fire protection, Teckentrup developed a double door solution especially for the Crossrail project.

Noise is also generated via the shafts. To reduce sound transmission, Teckentrup went one step further and designed a double door solution: the DW67 door (sound insulation value R = 57 dB) was combined with a T60 door (R = 42 dB). The second door also provides security - with a pressure resistance of 5 kPa in both directions and SR3 security.

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The result is doors with combined protective elements that also meet UK standards. To date, Teckentrup has supplied around 2000 doors for the entire London Underground project and a wide variety of requirements. In addition to the high pressure loads and sound insulation classes, these also include fire protection closures with up to 120 minutes fire resistance (E120I290).

Standard-compliant in the UK

The doors had to be supplied with the appropriate conformity for the British standards. In particular, the stricter version of "LPS 1175" for proof of product certification posed high hurdles.

The Teckentrup solutions meet all the specifications, including for soft impact tests, structural strength data, "U" values, cycle tests and life cycles. This tipped the scales in favour of the German manufacturer.

About the Elizabeth Line in London

The new underground "Elizabeth Line" links parts of Berkshire, Buckinghamshire and Essex with the central and south-eastern districts of Greater London. It runs for 60 miles from Reading and Heathrow in the west through London to Shefield and Abbey Wood in the east. When completed in the mid-2020s, the 'Elizabeth Line' will carry around 200 million passengers per year.

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