Open corridor
A corridor that is ventilated on one side to the outside, unobstructed, continuous along its length, with a clear height from the top of the parapet wall at the edge of the corridor upwards not less than 1.2 m.
A corridor that is ventilated on one side to the outside, unobstructed, continuous along its length, with a clear height from the top of the parapet wall at the edge of the corridor upwards not less than 1.2 m.