(1) Subject to specifications, if any, made in this behalf under the Tripura Town and Country Planning Act,1975, the ULB may specify any area or ward where the construction of any basement shall not be permitted.
(2)
(3) A basement may be used as —
(a) a parking space;
(b) an air-conditioning plant room or room for other machines used for any building service or for other purposes,
(c) a space for a stand by generator for power supply,
(d) a storage space for house hold or other goods of noninflammable nature,
(e) a strong room or bank locker,
(f) a dark room,
(g) a stack room in any library, or
(h) a business building, or mercantile building (retail)., or assembly building, if it is air-conditioned.
Outer walls of a basement shall not extend to the exterior open spaces as required under these rules.
(4) No basement or portion thereof shall be used for residential purpose.
(5)
(6) No kitchen, bathroom or water closet shall be permitted in any basement unless the sewer levels permit the same and there is no chance of back flow and flooding of sewerage. lf permitted, such kitchen, bathroom or water closet shall be placed against an external wall of the basement, which shall also be the external wall of the building and shall be adequately lighted and ventilated.
Detailed plans showing arrangement for drainage including pumping system shall be submitted in such cases.
Every basement shall -
(a) in every part be at least 2.4 meters in height from the floor to the underside of the roof slab or ceiling or any false roofing;
(b) have adequate arrangement so that surface drainage does not enter the basement, and have adequate arrangement for pumping out water, if necessary;
(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) have access by means of two or more ramps and a staircase, which are separated from the main and alternate staircase providing access and exit from higher level floors, the width of each ramp shall not be less than 3.5 meters and the slope shall not be steeper than 1(one) vertical to 6(six) horizontal and the distance between the ramps shall be such as may be determined by the Mayor/Chairperson of the ULB.
(e) in the case of such basement being used for a purpose as referred to in clause(g) of sub-rule(2), have sufficient numbers of access ways and exit ways so that the travel distance is not more than 15 meters;
(f) have adequate ventilation as required far any occupancy or use group under these rules :
provided that any deficiency may be met by providing adequate mechanical ventilation in the form of bowlers, exhaust fans at the, rate of one exhaust fan for every 50 sq. meters of the basement area, or by air-conditioning;
(g) comply with the requirements of the Tripura Fire Service Act as in forced in the State of Tripura and the rules and the directions made or issued there undeL Page 47
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