Step Tread Height Australia

Slip resistant nosings can be added to meet these standards.

Step tread height australia.

Maximum 7 3 4 inch stair riser height. It covers areas such as the requirements for balustrades handrails anti slip surfaces height and depth ratios of stair treads and the necessity of landings. The national construction code ncc formerly known as the building code of australia bca regulates stair construction and design in australia. Handrail graspability to be either type i or ii with a minimum 1 1 2 inch clearance from a wall.

Treads must be solid if the stairway is more than 10 metres high or connects more than 3 stories. This free stair calculator determines stair parameters such as rise total run and angle stringer length based on height run tread and headroom requirement. Handrail height to be placed a minimum 34 inches to 38 inches. Risers goings and depth.

540 2r g 700. The combination of twice the riser plus the going 2r g shall be not less than 540 mm and not greater than 700 mm i e. The maximum deflection shall be l 100 or 40mm whichever is the lesser over the horizontal span l of the stairway between supports. Stair treads need to be slip resistant and extend across the full width of the stairway.

The going shall be not greater than the tread depth td plus a maximum gap of 30 mm between the rear edge of one tread and the nosing of the tread above. Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing. Treads shall have a minimum live loading of 2 5 kpa or a 2 2 kn per linear metre or minimum point loading of 1 5 kn applied on 100mm 100 mm pad on each step whichever loading produces the more adverse effect.