Handrails and Grabrails
Interpretation of the Australian Standards AS1428.4
The requirements for the design and construction of handrails are as follows:
(a) Handrails shall be circular, between 30 and 50 mm in diameter for not less than 270 around the uppermost surface.
(b) All exposed edges of handrails shall have a radius of not less than 5mm.
(c) The top of handrails shall be between 865 and 1000 mm above the nosing of the tread or the plane of the finished floor of the walkway or ramp.
(d) The height of the top of the handrail shall be consistent through the ramp (or stairs) and any landings.
(e) Where a balustrade is required at a height greater than 1000 mm, a handrail shall also be provided.
(f) Handrails and balustrades shall not encroach into required circulation spaces.
(g) Handrails shall be securely fixed and rigid, and their ends shall be returned away to a side wall, or turned downwards through an angle of 180
(h) The clearance between a handrail and an adjacent wall surface or other obstruction shall be not less than 50 mm. This clearance shall extend above the top of the handrail by not less than 600 mm.
(i) Handrails shall be constructed and fixed so that there is no obstruction to the passage of a hand along the rail.
(j) The fastenings and the materials and construction of handrails shall be able to withstand forces, in accordance with AS1170.1.
The requirements for the design and construction of grabrails are as follows:
(a) Grabrails shall be between 30 and 40 mm in diameter, or they shall have sectional shape within these limits.
(b) All exposed edges of handrails shall have a radius of not less than 5 mm.
(c) The fastenings and the materials and construction of grabrails shall be able to withstand a force of 1100 N applied at any position and in any direction, without showing any visible signs of deformation or loosening of the fastening.
(d) Unless otherwise specified, the clearance between a grabrail and the adjacent wall surface or any other obstruction shall be between 50 mm and 60 mm. This clearance shall extend above the top of the grabrail by not less than 600 mm.
(e) Grabrails shall be fixed so that there is no obstruction to the passage of the hand along the top 270 of the rail.
(f) Grabrails shall not rotate in their fittings.