(1) Except as permitted in Sentences (2) and (6), a landing shall be,
(a) at least as wide as the width of the stair or ramp in which it occurs, and
(b) at least as long as the width of the stair or ramp in which it occurs.
(2) Where a landing in a stair or ramp does not turn or turns less than 90o, the length of the landing need not be more than the lesser of,
(a) the required width of the stair or ramp, or
(b) 1 100 mm.
(3) Where a landing in a stair or ramp turns less than 90o, the length of the landing shall be measured perpendicular to the nosings of adjacent steps or to the end of the ramp, at a distance equal to half the length required by Sentence (2) from the narrow edge of the landing.
(4) Where a doorway or stair empties onto a ramp through a side wall, there shall be a level area extending across the full width of the ramp, and for a distance of 300 mm on either side of the wall opening, except one side if it abuts on an end wall.
(5) Where a doorway or stair empties onto a ramp through an end wall, there shall be a level area extending across the full width of the ramp and along its length for not less than 900 mm.
(6) Where the direction of exit travel changes at a landing, the landing is permitted to be chamfered or curved in plan, provided the required width of the stair is maintained where measured perpendicular to the direction of exit travel across the landing.