Effective clear width of internal doors in new buildings

The effective clear width of a doorway is interrelated to the width of the circulation route and the direction of approach to the doorway. An internal door should contain a leaf, which provides an effective clear width of not less than that given in column (3) of Table 4.1. This effective clear width applies to a single leaf door or one leaf of a double leaf door. However, where a double leaf door is power operated, the effective clear width may be incorporated between both leaves provided those leaves operate simultaneously.