Section 36(5) in New Town Kolkata Planning Area (Building) Rules, 2014
(5)Every basement shall -(a)in every part be at least 2.10 m. in height from the floor or the underside of the beam or false ceiling;(b)have adequate arrangement so that surface drainage does not enter the basement, and have adequate arrangement for pumping out water, if necessary, by providing "Sump pit" or similar system;(c)have water-tight walls and floors which shall be so designed that the effect of the surrounding soil and moisture, if any, is taken into account in design and adequate damp-proofing treatment is given;(d)in case the parking area in the basement is less than 1000 Sq.M., only one ramp will be required. In case the parking area in the basement is more than 1000 Sq.M. at least two ramps should be provided. Width of each ramp shall not be less than 4.0 m. and the slope shall not be steeper than one vertical to six horizontal and the distance between the ramps shall be such as may be approved by the Sanctioning Authority;(e)If the basement is not used for car parking purposes, ramps will not have to be provided. In such cases, at least two staircases of minimum width as per use group shall have to be provided and such staircase shall be enclosed type;(f)in the case of a basement being used for a purpose as referred to Sub-Rule- (2) of this rule, the same must have sufficient numbers of access ways and exit ways so that the maximum travel distance is not more than 22.50 m from any point,(g)have adequate ventilation as required for any occupancy or use group under these rules -Provided that any deficiency may be met by providing adequate mechanical ventilation in the form of blowers and exhaust fans,(h)comply with the requirements of the West Bengal Fire Services Act, 1950, Fire Prevention and Safely Rules, 1996, and provisions laid down in National Building Code, as amended from time to time.
