Section 17 in Multi-Storeyed and Public Buildings Rules, 1973
17. Aisles and spacing rows of seats.
(a)Clear aisles not less than 1.2 metres in width shall be provided at right angles to the line of seating in such number and manner that no seat shall be more than 3.8 metres away from an aisle measured in the line of seating.(b)Where all the aisles do not directly meet the exit doors, cross aisles of minimum 1 metre width and at the rate of one cross aisle for every 19 rows of seats shall be provided parallel to the line of seating so as to provide direct access to the exit.(c)Rows of seats between aisles shall not have more than 14 seats and in the case of such rows opening to an aisle at one end, shall not have more than 7 seats.(d)There shall be a minimum space of 85 cm. between the backs of any two rows of seats and a minimum of 35 cm. between the back of any seat and the front of the seat immediately behind as measured between plumb lines.[17-A. Separation of bath and wash-basin water and reuse. [Inserted by G.O. Ms. No. 138, Municipal Administration and Water Supply Department (MAI), dated 11th October, 2002.]- Notwithstanding anything contained in these rules, every building shall be provided with separate pipelines, one for collecting water from bath and wash-basins and the other for connecting the toilets. The waste water from the toilets alone shall be connected to the street water. The waste water from the bath and wash-basins shall be disposed of as hereunder: -(i)Ordinary buildings (Ground + I Floor, residential buildings, not exceeding four dwelling units or Commercial/Industrial/Institutional building not exceeding 300 square metres). - The waste water from the bath and wash-basin shall be used for ground-water recharge by organic filtration (by providing suitable filter media) depending upon the soil suitability or for recycling for toilet flushing as indicated for other buildings specified in item (ii) below, -(ii)Building other than buildings specified in time (1) above. - Each building shall have a separate downward pipeline to collect waste water from bath and wash basins and the collected waste water shall be treated adequately by organic or mechanical recycling and taken to a sump for onward pumping to the exclusive overhead tank or to a separate compartment of overhead tank, for exclusive use of toilet flushing cisterns. The excess waste water not reused for toilet flushing, shall be suitably connected to the rain-water recharge structures for ground-water recharge.Explanation. - For purposes of these rules in regard to recycling systems are concerned, any other modifications, additional structures alternative designs furnished by the applicant shall be considered for approval, if it conforms to recycling concept to the satisfaction of the competent authority for building plan approval.]
