Australian standard AS1657 : Stairs
2021-9-26 · Australian standard AS1657 . Stairs. Stairways Angles. The angle of the stairs slope to the horizontal is 20° to 45°, but it is recommended to have the range between 30° and 38°. Stairways clearances. Stairways shall be ≥ 600mm wide inside the stiles and it is to have a minimum clearance of 550mm between rails.
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