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Design & innovation

Platform specification & technical capability

Design Standards

  • BS 5950 Part 1: 2001 – Design of Structural Steelwork
  • Railway Group Standard GC/RT 5110 – Design Requirements for Structures
  • Railway Group Standard GC/RT 5161 – Station Design and Maintenance Requirements
  • Railway Group Standard GC/TT0196 – Station Platform Design Guide

Loading

  • BS 6399 Part 1: 1996 - Loadings for Buildings, plus the following specific cases:
  • 7.5kN/m2 distributed live loading
  • Point load 10kN applied over an area of 200mm x 200mm
  • Point load 4.5kN applied over an area of 50mm x 50mm
  • If required different load capabilities can be accommodated.

Design Life

  • All structural steel components are hot dipped galvanised to BS EN ISO 1461
  • Design life to first major refurbishment for the structural steel frame
  • Design life of 25 years for the platform wearing surface (depending upon surface)

Platform Configuration

  • Width – unrestricted
  • Length - unrestricted
  • Ramps - standard or as required
  • Curvature - convex, concave and reverse curves of any radius can be accommodated
  • Curve radius of <200m can be achieved for a 3m wide platform using standard components. Tighter radii curves can be accommodated using non-standard sections manufactured on a site specific basis
  • Longitudinal gradient – any gradients encountered in a station environment can be accommodated
  • Ground conditions – the lightweight nature of the structure make sit suitable for virtually all ground conditions.

Structure self-weight

  • Typical platform arrangement, permanently surfaced (flag paving) is approximately 315kg/m2 of which 200kg/m2 is the flag surfacing
  • Loading per leg is approximately 570kg (including flag surfacing).

Adjustability

  • Horizontal - standard reach of +50mm / -170mm (range can be increased if necessary, dependant upon particular railway construction safety constraints)
  • Vertical - typical working range of +50mm / -100mm (threaded element of component is longer than this so can potentially go more than +50mm).

Foundations

  • Bearing pressure - to suit ground conditions
  • Design - simple reinforced in-situ cast strip or pre-cast slab (or potentially timber for temporary application)
  • Accuracy - vertical adjustability of the leg allows unplanned variation in foundation levels to be readily accommodated within likely fluctuation range