Upstand to contrast visually with the surface of the
ramp. Non-slip treads and nosings on steps: a = 170mm (max) b =
280mm (min). For ramps 300mm or more rise, alternative stepped
access required.
Gradients: Ramps should have the lowest practical
gradient within the range 1:20 to 1:12. 1 in 12 maximum, landings
at 2 metres. 1 in 15 and less, landings at 5 metres. 1 in 20
preferred, landings at 10 metres.
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