Section 57: Additional provisions for buildings other than residential buildings . For building other than residential buildings the following additional provisions of means of access shall be ensured

( a) the width of the main street, on which the building abuts shall not be less than 12 meters an~ one end of this street shall join another street of width not less than 12 meters;

(b) the approach to the building and open spaces• on its sides shall be hard surfaced capable of taking the weight of fire engine. The side open space shall be kept free of o~structions and shall be motor­ able;

( c) . main entrance to the plot shall be of adequate width to allow easy access to the fire engine and in no case it shall measure less than

4.5 meters. The entrance gate shall fold back against the compound wall of the premises leaving the exterior access way within the plot free for movement· .of fire service vehicles. If main entrance .at boundary ·wall is built over, the minimum clearance ·shall be 4.5 meters.