3. Policies, procedures and expected results per strategic area
3.4. Services and IT
HEIGHT The height of a store room shall be not less than 2.2 m.
1 2 . 7 . 2 -The size of a store room, where provided in a residential building, shall be not less than 3
12.8 Garage
HE I G H T -The height of a garage shall be not less than 2.4 m.
NATIONAL BUILDING CODE OF INDIA
size garages shall be as below:
a) 2.5 5.0 m,
and
Based on the number of vehicles parked, etc
12.9 Basement
12.9.1 The basement shall not be used for residential purposes.
12.9.2 The of the basement shall be allowed by the authority in accordance with the land use and other provisions tied under the Development Control Rules.
12.9.2.1 The basement to be constructed within the prescribed set-backs and prescribed building lines and subject to maximum cover-age on floor (entrance floor) may be put to only the following uses:
a) Storage of household or other goods of ordinarily combustible material;
b) Strong rooms, bank cellars, etc;
c) Air-conditioning equipment and other machines used for services and utilities of the building; and
d) Parking spaces.
12.9.3 The basement shall have the following requirements:
Every basement shall be in every part at least 2.4 m in height from the floor to the underside of the roof slab or ceiling;
Adequate ventilation shall be provided for t h e b a s e m e n t . T h e v e n t i l a t i o n requirements shall be the same as required by the particular occupancy according to Any deficiency may be met by p r o v i d i n g a d e q u a t e m e c h a n i c a l ventilation in the form of blowers, exhaust fans, air-conditioning systems, etc;
The minimum height of the ceiling of any basement shall be 0.9 m and the maximum, 1.2 m above the average surrounding ground level;
Adequate arrangements shall be made such that surface drainage dues not enter the basement;
The walls and floors of the basement shall be watertight and be so designed that the effects of the surrounding soil and moisture, if any, are taken into account in design and adequate damp proofing treatment is given; and
The access to the basement shall be separate from the main and alternative staircase providing access and exit from
higher floors. Where the staircase is continuous in the case of buildings served by more than one staircase, the same shall be of enclosed type serving as a fire separation from the basement floor and higher floors. Open ramps shall be permitted if they are constructed within the building line subject to the provision of 12.10 Chimneys-The chimneys shall be built at least 0.9 m above flat roofs, provided the top of the chimneys is not below the top of the adjacent parapet wall. In the case of slop-ing roofs, the chimney top shall not be less than 0.6 m above the ridge roof in which the chimney penetrates.
Parapet Parapet walls and handrails provided on the edges of roof terraces, bal-cony, varandah, etc shall not be less than 1.05 m and not more than 1.20 m in height from the finished floor level.
12.12 Cabin -The size of cabins shall not be less than 3.0 The clear passages within the divided space of any floor shall not be less than 0.75 m and the distance from the farthest space in a cabin to any exit shall not be more than 18.5 m. In case the subdivided cabin does not derive direct lighting and ventilation from any open spaces/mechanical means, the maximum height of the cabin shall be 2.2 m.
12.13 Boundary
12.13.1 The requirements of the boundary wall are given below:
Except with the special permission of the Authority, the maximum height of the compound wall shall be 1.5 m above the centre line of the front street. Compound wall up to 2.4 m height may be permitted if the top 0.9 m is of open type construction of a design to be approved by the Authority.
In the case of a corner plot, the height of the boundary wall shall be restricted to 0.75 m for a length of m on the front and side of the intersections and the balance height of 0.75 m if required in accordance with (a) may be made up of open type construction (through railings) and of design to be approved by the Authority.
However, the provisions of (a) and are not applicable to boundary walls of jails.
I n i n d u s t r i a l b u i l d i n g s , e l e c t r i c s u b s t a t i o n s , t r a n s f o r m e r s t a t i o n s , institutional buildings like sanitoria, hospitals, i n d u s t r i a l b u i l d i n g s l i k e workshops, factories and educational buildings like schools, colleges, including hostels. and other uses of public utility
DEVELOPMENT CONTROL RULES AND GENERAL BUILDING
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undertakings height up to 2.4 m may be permitted by the Authority.
12.14 Wells Wells, intended to supplv water for human consumption or domestic purposes, where provided, shall comply with the requirements of and 12.14.2.
LO C A T I O N - T h e w e l l s h a l l b e located:
not less m from any ash pit, refuse pit, earth closet or privy and shall be located on a site upwards from the earth closet or privy;
not less than 18 m from any pit or latrine and shall be located on a site upwards from the earth closet or privy;
that contamination by the movement of sub-soil or other water is unlikely; and not under a tree or otherwise it should have a canopy over it, so that leaves and twigs may not fall into the well and rot.
12.14.2 REQUIREMENTS -The well shall:
have a minimum internal diameter of not less than m;
be constructed to a height not less than m above the surrounding ground level.
to form a parapet or kerb and to prevent surface water from flowing into a well. and shall be surrounded with a paving constructed of impervibus material which shall extend for a distance of not less than m in every direction from the parapet from the kerb forming the well head and the upper surface of such a paving shall be sloped away from the well;
be of sound and permanent construction t h r o u g h o u t . T e m p o r a r y o r exposed wells shall be permitted only in fields or gardens for purposes of irrigation; and
have the interior surface of the lining or walls of the well be rendered impervious for a depth of not less than 1.8 m measured from the level of the ground immediately adjoining the well-head.
Septic Tanks-Where a septic tank is used for sewage disposal, the location. design and construction of the septic tank shall c o n f o r m t o r e q u i r e m e n t s o f and 12.1.5.2.
12.15.1 LOCATION OF SEPTIC TANKS AND
ABSORPTION SYSTEMS A subsoil dispersion system shall’not be closer than m from any source of drinking water, such as well, to mitigate the possibility of bacterial pollution of water supply. It shall also be as far removed from the nearest
habitable building as economically feasible but not closer than m, to avoid damage to the structures.
DIMENSIONS SEPTIC’ TANKS Septic tanks shall have a minimum width of 75 cm, a minimum depth of m below the water level and a minimum liquid capacity of The length of tanks shall be 2 to 4 times the width;
Septic tanks may be constructed of brickwork. stone masonry, concrete or other suitable materials as approved by the Authority;
Under no circumstances shall effluent from a septic tank be allowed into an open channel drain or body of water without adequate treatment;
The minimum nominal diameter of the pipe shall be mm. Further. at junctions of pipes in manholes, direction of flow from a branch connection shall not make an exceeding 45” with the direction of flow in the main pipe;
gradients of land drains.
drainage as well as the bottom of dispersion trenches and shall be between and
Every septic tank be provided with ventilating pipe of at least 50 mm diameter. The top of the pipe shall be provided with a suitable cage of
proof wire mesh.
The ventilating pipe shall extend to a height which would cause no smell nuisance to any building in the area.
Generally. the ventilating pipe may extend to a height of about 2 when the septic tank is at least m away from the nearest building and to a height of 2 above the top of the building when it is located closer than 15 m;
When thedisposal tank effluent is to a seepage pit, the seepage pit may be of any suitable shape with the least sectional dimension of 90 cm and not less than 100 cm in depth below the invert level of the inlet pipe. The pit may be lined with stone, brick or concrete blocks with dry open joints which should be backed with at least 7.5 cm of clean coarse aggregate.
The lining above the inlet level should be finished with mortar. In the case of pits of large dimensions, the top portion may be narrowed to reduce the size of RCC cover slabs. no lining is used, specially near trees, the entire pit should be filled with loose stones. A masonry ring may be constructed at the top of the pit to prevent damage by flooding of the pit by
NATIONAL CODE OF INDIA
When the disposal of the septic tank effluent is to a dispersion trench, the dispersion trench shall be 50 to deep and 30 to 100 cm wide excavated to a slight gradient and shall be provided with 15 to 25 cm of washed gravel or crushed stones. Open jointed pipes placed inside the trench shall be made of unglazed earthenware clay or concrete and shall have a minimum internal diameter of 75 to 100 mm. Each dispersion trench shall not be longer than 30 m and trenches shall not be placed closer than 1.8 m.
16 Office-cum-Letter Box Room In the case of multistoreyed multifamily dwelling apartments constructed by existing and proposed Cooperative Housing Societies or Apartment Owners Associations, limited companies and proposed societies, an cum-letter box room of dimension 3.6 X 3 m shall be provided on the ground floor. In case the number of flats is more than 20, the maximum size of the office-cum-letter box room shall be 20
surface runoff. The inlet pipe may be c) Assembly buildings like taken down a depth of 90 cm from the top auditoria, theatres and
as an anti-mosquito and cinemas
d) Educational building up to 24 m in height more than 24 m in height
e) Institutional buildings 2.0 m up to 10 beds
more than 10 beds 2.0 m
All other buildings 1.5 m
12.18.1.2 MINIMUM TREAD -The minimum width of tread without nosing shall be 25 cm for residential buildings. The minimum width of tread for other buildings shall be 30 cm.
MAXIMUM RISER -The maximum height of riser shall be 19 cm for residential buildings and 15 cm for other buildings and these shall be limited to 15 per
12.16.1 BUSINESS BUILDINGS Provision shall be made for letter boxes on the entrance floor as per the requirements of the postal department.
12.17 Meter Rooms- For all buildings above 15 m in height and in special occupancies, like educational, assembly, institutional, industrial, storage, hazardous and mixed occupancies with any of the aforesaid occupancies having area more than 500 on each floor, provision shall be made for an independent and ventilated meter (service) room, as per requirements of electric (service) supply undertakings on the floor with direct access from outside for the purpose of termination of electric supply from the licensee’s service and alternative supply cables. The door/doors provided for the service room shall have resistance of not less than two hours.
12.18 Staircase
The minimum clear width, minimum tread width and maximum riser of staircases for buildings shall be as given in 12.18.1.1 to 12.18.1.3 Part IV
Fire protection).
MINIMUM WIDTH -The minimum width of staircase shall be as follows:
a) Residential buildings (dwellings) 1.0 m
NOTE-For row housing with 2 storeys, the mini mum width shall be 0.75 m.
b) Residential hotel buildings 1.5 m
1.5 m
1.5 m
12.18.2 The minimum head-room in a passage under the landing of a staircase shall be 2.2 m. The minimum clear head-room in any staircase shall be 2.2 m.
12.19 Roofs
12.19.1 The roof of a building shall be so constructed or framed as to permit effectual drainage of the rain-water therefrom by means of sufficient rain-water pipes of a d e q u a t e s i z e , w h e r e v e r r e q u i r e d , s o arranged, jointed and as to ensure that the rain-water is carried away from the building without causing dampness in any part of the walls or foundations of the building or those of an adjacent building.
12.19.2 The Authority may require rain-water pipes to be connected to a drain or sewer to a covered channel formed beneath the public footpath to connect the rain-water pipe to the road gutter or in any other approved manner.
12.19.3 Rain-water pipes shall be affixed to the outside of the external walls of the building or in recesses or chases cut or formed in such external walls or in such other manner as may be approved by the Authority.
12.20 Special requirements of low income housing shall be as given in Appendix D. For detailed information in this regard, reference may be made to the accepted standards
12.21 The special for planning of buildings keeping in view the needs of the
l in this part, where reference, is made to ‘accepted standards’ or ‘good practice’ in relation to design, testing, construction procedure or other information, the appropriate document listed at the end of this part may be used as a guide to the interpretation of this terms
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DEVELOPMENT CONTROL RULES AND BUILDING