scope:

This technical specification relates to four-foot walkway panels which may be installed to span the drainage channel in tube running tunnels as an alternative to filling the channel with shingle. The tube track concerned may be either sleepered or not.

If you are working within TfL, this technical specification applies to you, including LU staff, TfL engineering staff and all suppliers involved in the design, supply, and installation of tube four-foot walkway panels for tracks in the tube sections.

Purpose

The purpose of this technical specification is to define the performance requirements and acceptance criteria for four-foot walkway panels within the tube environment.