Platform specification & technical capability

Design Standards

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