Step Tread Width Australia

Maximum 7 3 4 inch stair riser height.

Step tread width australia.

Find the right tread and riser for your situation by pluging your measurements into this formula. Stairs australian standard as1657 as1657 stairs details. Maximum 12 3 vertical height rise for a flight of stairs. Minimum and maximum dimensions and ratios are given along with the maximum number of steps you can have in a flight.

Or use the handy chart below with the ratios already figured for you. You ll find the tread width in the column on the left and the rise height in the column on the right. The tread depth is the distance from the front edge or nosing a tread projection that overhangs the riser below of one step to the front edge or nose of the next step measured horizontally. Unfinished pine tread is applied to a radiate pine edge glued core.

Additionally the tread depth must be greater than or equal to 185mm. The width required tread type hand rails height. The national construction code ncc formerly known as the building code of australia bca regulates stair construction and design in australia. Australian standards for stairs and handrails outline that staircases need handrails on all exposed sides unless there s a fixed structure within 10cm of the stairway.

10 to 11 inches minimum. Unfinished pine stair tread made of two pine re saw layers the surewood lnl made of two pine re saw layers the surewood lnl 48 in. Staircase tread run depth. Every staircase needs one handrail.

Step tread 2 riser 26 or 27. Stair width does not include handrails. 540 2r g 700. 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.

See as1657 for details. Minimum 10 inch stair tread depth with nosing or minimum 11 inches with no nosing. For interior use only our pine tread features a clean uniform look that is clear of most knots and imperfections commonly found in solid pine treads. Includes risers and going ration.

Minimum 6 8 headroom height clearance for stairway. Or the width of the stair tread. Stair width is measured from edge to edge of each side of the tread perpendicular to tread length. A step tread is the flat horizontal surface that you walk on.

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. In buildings step tread widths the going and heights the riser are dictated by the building code of australia bca.