Tunnel-Wall System

Enclosure and partitioning of electrical installations in road tunnels

Especially suitable for tunnels

Various variants possible


Standardized, fire-resistant wall system for large enclosures and fire-retarding sealing in road tunnels. In combination with PRIODOOR ETX TUN and fire-retarding seals, this fire protection system is suitable for compliant partitioning of electrical systems with safety requirements for the maintenance of performance in case of fire and for fire load insulation. Implementation according to Directive 2004/54/EG, RABT, ZTV-ING Part 5.


  • Fire resistance 90 minutes: fire-resistant
  • EI 90/F 90 classification wall/ceiling/doors
  • Smoke protection
  • Safety class I
  • Protection rating in accordance with IP 54
  • Stable against pressure / suction up to 1000 Pa


  • Self-supporting wall system, consisting of prefabricated elements
  • Fastening to tunnel wall via angel section and cable tie mount in stainless steel
  • Suitable for installation of:
    • Inspection door PRIODOOR ETX TUN
    • Fire Resisting Closures PRIODOOR FSA TUN
    • Bulkheads and Pressure compensation elements


Material characteristic

  • Non-combustible board with surface coating, classification A2 – s1, d0
  • Outside surface in stainless steel 1.4571
  • Inside surface with synthetic coating, optionally lined with stainless steel

Dimension drawing

File name
Catalogue excerpt .pdf
Text for tender PRIOWALL TUN .pdf


  • Cable and pipe bulk head for wall
  • Ventilation / Pressure equalization