No part of a room having daylight openings shall be farther from the plane of such an opening than the distance measured perpendicular to that plane, set out in Table II for the area of daylight openings provided in the room.

Table II
Depth Of Room Permitted For Various Areas Of Daylight Openings

• For intermediate values of daylight opening areas, the corresponding maximum permissible distance shall be found by linear interpolation
** H is the height above floor-level of the head of the daylight opening concerned.