Technical Booklet H Stairs Ramps Guarding and Protection from Impact·Page 36·4.8
Handrails for ramps
Ramps with a total rise over 600 mm must have continuous handrails providing firm support and grip. The handrail requirement depends on ramp width, and handrails should be positioned at a specific height.
A ramp or a series of ramps with a total rise of more than 600 mm should have a continuous handrail that gives firm support and a firm grip –
(a) on at least one side where the ramp is 1000 mm wide or less; or
(b) on both sides where the ramp is more than 1000 mm wide.
Handrails should be at a height between 900 mm and 1000 mm measured vertically above the surface of the ramp.
Handrails may form the top of guarding.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet H - Stairs Ramps Guarding and Protection from Impact.pdf