To require exits and paths of travel to an exit to have dimensions to allow all occupants to evacuate safely within a reasonable time.
Under D2D11(a)(i), the required stairway width must be measured clear of obstructions, including handrails and projecting barriers.
Under D2D11(a)(ii), the required width of a stairway must continue to a height of 2 metres above the stair. This measurement is consistent with other similar BCA requirements.
Figure D2D11 illustrates compliance with D2D11(a).
Figure D2D11: Method of measuring height and width of a stairway
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