STRUCTURAL SAFETY AND SERVICES
5.0 STRUCTURAL DESIGN
The structural design of foundation, masonry, timber, plain concrete, reinforced concrete, prestressed concrete and structural steel shall be carried out in accordance with Part-VI structural design, section-1 loads,
section-2 foundation, section-3 wood, section
masonry, section-5 concrete and section-6 steel of the National Building Code of India, 2005 taking into consideration all relevant Indian Standards prescribed by Bureau of Indian Standards including the Indian
Standard given in IS-Code 1893-1984, 13920
1993, 4326-1993, 13828-1993, 13827-1993 and 13935-1993 for structural safety. All the structural design shall incorporate earthquake resistant features in buildings.
5.5 QUALITY OF MATERIALS AND WORKMANSHlP
All materials and workmanship shall be of good quality conforming generally to accepted standards of Public Works Department and Indian standard specification and codes as included in Part-V Building Materials
and Part-VII Construction practices and safety of the National Building Code of India, 2005.
5.6 ALTERNATIVE MATERIALS, METHODS OF DESIGN AND CONSTRUCTION AND TESTS
5.2.1 The provision of this Building Bye-laws are not intended to prevent the use of any material or method of design or construction not specifically prescribed by this Bye-laws, provided any such alternative has been
approved. The Building materials approved
by B.I.S. or any statutory body shall form part of the approved building material and technology as part of this Building Bye-laws.
5.7 BUILDING SERVICES
5.7.1 The planning design and installation of electrical installations, air conditioning installation of lifts and escalators can be carried out in accordance with Part-VIII Building Services, section–2 electrical installation, section–3 air conditioning and heating,
section-5 installation of lifts and escalators of the National Building Code of India, 2005. However deviations from National Building Code may be done as per good engineering practices.
5.7.2 The number and type of lifts to be provided in different buildings shall be as given in Appendix-D & D-1.
5.7.3 The requirements of electric sub-station are given in Appendix-D2.
The provision of electric sub-station shall also require approval from Electricity Board concerned.
5.8 PLUMBING SERVICES
5.8.1 The planning, design, construction and installation of water supply, drainage and sanitation and gas supply system shall be in accordance with Part-IX Plumbing Services, section-l water supply; section-2 drainage and sanitation and section-3 gas
supply of the National Building Code of India, 2005.
5.4.2 Requirement of water supply for various occupancies in buildings shall be as given in Table 5.1, 5.2, and 5.3.
5.4.3 Requirement of sanitary fittings and installations for different occupancies in buildings shall be as given in Table 5.4 to 5.15. For calculation of occupancy, clause 4.1 shall be is referred.
| SI.NO. | Type of Occupancy | Consumption per head per day (in lt.) |
| 1 |
Residential (a) In living units (b) Hotels with lodging accommodation (per bed) |
135 180 |
| 2 | Educational (a) Day schools (b) Boarding Schools |
45 135 |
| 3 | Institutional (Medical Hospitals) (a) No. of beds not exceeding 100 (b) No. of beds exceeding 100 (c) Medical quarters and hostels |
340 450 135 |
| 4 | Assembly- Cinema theatres, auditoria, etc. (per seat accommodation) | 15 |
| 5 | Government or semi public business | 45 |
| 6 | Mercantile (Commercial) (a) Restaurants (per seat) (b) Other business building |
70 45 |
| 7 | Industrial (a) Factories where bath-rooms are to be provided (b) Factories where bath-rooms are not to be provided |
45 30 |
| 8 | Storage ( including Warehouses ) | 30 |
| 9 | Hazardous | 30 |
| 10 | Intermediate Stations (excluding mail and express stops). | 45(25)* |
| 11 | Junction Station | 70(45)* |
| 12 | Terminal Stations | 45 |
| 13 | International and Domestic Airports | 70 |
Note: The number of persons for Sl. No. 10 to 13 shall be determined by the average number of passenger handled by the station daily with due consideration given to the staff and workers likely to use the facilities.
Table 5.2 Flushing Storage Capacities
| Sl.No. | Classification of Building | Storage Capacity |
| 1. | For tenements having common convenience |
900 lt. net per w.c. seat |
| 2. | For residential premises other than tenement having common conveniences |
270 lt. net for one w.c. seat each and 180 lt. for each additional seat in the same flat. |
| 3. | For factories and workshops | 900 lt. per w.c. seat and 180 lt. per urinal. |
| 4. | For cinemas, public assembly hall, etc. |
900 lt. per w.c. seat and 350 lt. per urinal. |
Table 5.3 Domestic Storage Capacities
| SI.No. | No.of.Floors | Storage Capacity | Remarks |
| For premise occupied tenements with common conveniences: | |||
| 1. | Ground floor | Nil | Provided down take fittings are installed |
| 2. | Floors 2, 3,4, 5 and upper floors | 500 litre per tenement | |
| For premises occupied as flats or blocks | |||
| 1. | Ground floor | Nil | Provided down take fittings are installed |
| 2. | Floors 2, 3, 4, 5 and upper floors | 500 litre per tenement | |
Note 1: If the premises are situated at a place higher than the road level in front of the premises, storage at ground level shall be provided on the same lines as on floors.
2: The above storage may be permitted to be installed provided that the total domestic storage calculated on the above basis is not less than the storage calculated on the number of down take fittings according to scale given below:
1.1.1.3 Down take taps 70 l. each
Showers 135 l. each
Bathtubs 200 l. each
Table 5.4 Sanitation requirements for shops and Commercial Offices
| Sl. No. | Sanitary Unit /Fittings | For Personnel |
| 1. | Water closet | One for every 25 persons or part thereof exceeding 15 (including employees and customers). For female personnel 1 for every 15 persons or part thereof exceeding 10. |
| 2. | Drinking Water Fountain |
One for every 100 person with a minimum of one on each floor. |
| 3. | Wash Basin | One for every 25 persons or part thereof. |
| 4. | Urinals | Same as Sl. No. 3 of Table 5.9 |
| 5. | Cleaners’ Sink | One per floor minimum, preferably in or adjacent to sanitary rooms. |
Note: Number of customers for the purpose of the above calculation shall be the average number of persons in the premises for a time interval of one hour during the peak period. For male-female calculation a ratio of 1: 1 may be assumed.
Table-5.5 Sanitary Requirements for Hotels
| SI.No. | Sanitary Unit | For Residential Public Staff | For Non Residentail Staff | |
| For Male | For Female | |||
| 1. |
Water Closet (W.C.) |
One per 8 Persons omitting occupants of the attached water closet minimum of 2 if both sexes are lodged |
1 or 1-15 persons 2 for 16-35 persons 3 for 36-65 persons 4 for 66-100 persons |
1 for 1-12 persons 2 for 13-25 persons 3 for 26-40 persons 4 for 41-57 persons 5 for 58-77 persons 6 for 78-100 persons |
| 2. | Ablution Taps |
One in each W.C | One in each W.C | One in each W.C. |
| 3. | Urinals | Nil | Nil upto 6 persons 1 for 7-20 persons 2 for 21-45 persons 3 for 40-70 persons 4 for 71-100 persons |
Nil |
| 4. | Wash Basins |
One per 10 persons omitting each basin installed in the room / suite |
1 for 15 persons 2 for 16-35 persons 3 for 36-65 persons 4 for 66-100 persons |
1 for 1-12 2 for 13-25 3 for 26-40 4 for 41-57 5 for 58-77 6 for 78-100 |
| 5. | Baths | One per 10 persons omitting occupants of room with bath in suite |
Nil | Nil |
| 6. | Stop Sinks | One per 30 Bed rooms (one per floor minimum) |
Nil | Nil |
| 7. | Kitchen Sink |
One in each Kitchen | One in each Kitchen | One in each Kitchen |
Table 5.5 contd. For Public Rest Rooms
| SI.No. | Sanitary Unit | For Male | For Female |
| 1. | Water Closet |
One per 100 persons upto 400 persons; for over 400 add at the rate of one per 250 persons or part thereof. |
Two for 10 persons upto 200 persons; over 200 add at the rate of one per 100 persons or part thereof. |
| 2. | Ablution taps | One in each W.C. | One in each W.C. |
| 3. | Urinals | One for 50 persons or part thereof. |
Nil, upto 6 persons 1 for 7-20 persons 2 for 21-45 persons 3 for 46-70 persons 4 for 71-100 persons |
| 4. | Wash Basins | One per W.C. and urinal provided |
One per W.C. and urinal provided |
| 5. | . Baths | -- | -- |
| 6. | Stop Sinks | -- | -- |
| 7. | Kitchen Sink | One In Each Kitchen | One In Each Kitchen |
Note: i) It may be assumed that the two-thirds of the number are males and one- third females
ii) One water tap with drainage arrangements shall be provided for every 50 persons or part thereof in thevicinity of water closet and urinals.
| SI.No. | Sanitary Unit | Requirement |
| 1. | Water Closet | One for every 15 pupils or part thereof -- |
| 2. | Ablution Taps | One in each W.C. |
| 3. | Urinals | -- |
| 4. | Wash Basins | One for every 15 pupils or part thereof |
| 5. | Baths | One bath sink per 40 pupils |
| 6. | Drinking Water Fountains | One for every 50 pupils or part thereof |
| 7. | Cleaner’s Sink | -- |
Note: 1. One water tap with draining arrangements shall be provided for every 50 persons or part thereof, in the vicinity of water closets and urinal.
2. For teaching staff, the schedule of sanitary units to be provided shall be the same as in case of office buildings (Table 5.9).
Table 5.7 Sanitation Requirements for Institutional (Medical) Occupancy- Hospital
| SI.No. | Sanitary Unit | Hospitals with Indoor Patient Ward | Hospitals with Outdoor Patient Wards | |
| For Male & Female | For Males | For Females | ||
| 1. |
Water Closet (W.C.) |
One for every 6 beds or part thereof |
One for every 100 persons or part thereof |
Two for every 100 persons or part thereof |
| 2. | Ablution taps | One in each W.C. | One in each W.C. | One in each W.C. |
| 3. | Wash Basins | Two upto 30 bed; add one for every additional 30 beds; or part thereof |
One for every 100 persons or part thereof |
One for every 100 persons or part thereof |
| 4. | Baths with Shower |
One bath with shower for every 8 beds or part thereof. |
-- | -- |
| 5. | Bed pan washing sink |
One for each ward | -- | -- |
| 6. | Cleaner’ Sinks | One for each ward | One per floor minimum | One per floor minimum |
| 7. | Kitchen sinks & dish Washers (where Kitchen is provided) |
One for each ward | -- | -- |
| 8. | Urinals | -- | One for every 50 persons or part thereof |
-- |
Table 5.7 contd. Administrative Buildings
| SI.No. | Sanitary Unit | For Males | For Females |
| 1. | Water Closet (W.C.) | One for every 25 persons or part thereof |
One for every 15 persons or part thereof |
| 2. | Ablution Taps | One in each W.C | One in each W.C |
| 3. | Wash Basins | One for every 25 persons or part thereof |
One for every 25 persons or part thereof |
| 4. | Baths with Shower | One for each floor | One for each floor |
| 5. | Bed pan washing sink | -- | -- |
| 6. | Cleaner’s Sink | One per floor minimum | One per floor minimum |
| 7. | Kitchen sinks & dish Washers | One for each floor | One for each floor |
| 8. | Urinals | Nil upto 6 persons 1 for 7-20 persons 2 for 21-45 persons 3 for 46-70 persons 4 for 71-100 persons From 101 to 200 persons add at the rate of 3%; for over 200 persons add at the rate of 2.5%. |
Table-5.8 Sanitation Requirements for Institutional (Medical) Occupancy- (staff quarters and Hostels)
| SI.No. | Sanitary Unit | Doctor's Dormitaries | Nurses Hostel |
|
| For Male Staff | For Female Staff | |||
| 1. | Water Closet | One for 4 persons | One for 4 persons | One for 4 persons or part thereof |
| 2. | Ablution Taps | One in each W.C. | One in each W.C. | One in each W.C. |
| 3. | Wash Basins | One for every 8 persons or part thereof |
One for every 8 persons or part thereof |
One for every 8 persons or part thereof |
| 4. | . Bath (with shower) |
One for every 4 persons or part thereof |
One for every 4 persons or part thereof |
One for every 4 persons or part thereof |
| 5. | Cleaner’s Sink | One per floor minimum |
One per floor minimum |
One per floor minimum |
Table: 5.9 Sanitation Requirements for Governmental and Public Business Occupancy and Offices
| SI.No. | Sanitary Unit | For Male Personnel | For Female Personnel |
| 1. | Water Closet (W.C.) | One for 25 persons or part thereof |
One for 15 persons or part thereof |
| 2. | Ablution taps | One in each W.C. | One in each W.C. |
| 3. | Urinals | Nil upto 6 persons 1 for 7-20 persons 2 for 21-45 persons 3 for 46-70 persons 4 for 71-100 persons From 101 to 200 add at the rate of 3%; For over 200 persons add at the rate of 2.5%. |
-- |
| 4. | Wash Basins | One for every 25 persons or part thereof |
-- |
| 5. | Drinking water fountains |
One for every 100 persons with a minimum of one on each floor |
-- |
| 6. | Baths | Preferably one on each floor |
Preferably one on each floor |
| 7. | Cleaner’s Sinks | One per floor minimum; | preferably in or adjacent to sanitary rooms. |
Note: One water tap with drainage arrangements shall be provided for every 50 persons or part thereof in the vicinity of water closet and urinals.
Table-5.10 Sanitation Requirements for Residences
| SI.No. | Sanitary Unit | Dwelling with individual conveniences | Dwelling without individual conveniences |
| 1. | Bath Room | One provided with water tap |
One for every two tenement |
| 2. | Water Closet (W.C.) |
One | One for every two tenement |
| 3. | Sink (or Nahani) in the Floor |
One | -- |
| 4. | Water Tap | One | One with drainage arrangement in each tenement |
Note: Where only one water closet is provided in a dwelling, the bath and water closet shall be separately accommodated.
Table: -5.11 Sanitation Requirements for Assembly Occupancy Buildings (Cinema, Theaters, Auditoria. etc.)
| SI.No. | Sanitary Unit | For Public | For Staff | ||
| Male | Female | Male | Female | ||
| 1. |
Water Closet |
One for 100 persons upto 400 persons. For over 400 persons, add at the rate of 1 per 250 persons or part thereof |
Two per 100 persons upto 200 persons. For over 200 persons add at the rate of 1 per 100 persons or part thereof |
One for 15 persons. Two for 16-35 persons |
One for 1-12 persons. Two for 13-25 persons |
| 2. | Ablution Taps |
One in each W.C | One in each W.C | One in each W.C | One in each W.C |
| 3. | Urinals | One for 50 persons or part thereof |
___ | Nil upto 6 persons One for 7-20 persons Two for 21-45 persons |
___ |
| 4. | Wash Basins | One for every 200 persons or part thereof |
One for every 200 persons or part thereof |
One for 1-15 persons Two for 16-35 |
One for 1-12 persons Two for 13-25 persons |
| 5. | Drinking Water Fountain |
One per 100 persons or part thereof | |||
Note: -( i) One water tap with draining arrangements shall be provided for every 50 persons or part thereof in the vicinity of water closets and urinals.
(ii) It may be assumed that two thirds of the number are males and one third females.
Table: -5.12 Sanitation Requirements for Assembly Occupancy Buildings (Art, Galleries, Libraries and Museums)
| SI.No. | Sanitary Unit | For Public | For Staff | ||
| For Male | For Female | For Male | For Female | ||
| 1. | Water Closet (W.C.) |
One for 200 persons upto 400 persons. For over 200 persons, add at the rate of 1 per 250 persons or part thereof |
One per 100 persons upto 200 persons. For over 200 persons, add at the rate of 1 per 150 persons or part thereof |
One for 1-15 persons. Two for 16-35 persons |
One for 1-12 persons. Two for 13-25 persons |
| 2. | Ablution Taps |
One in each W.C. | One in each W.C. | One in each W.C. | One in each W.C. |
| 3. | Urinals | One for 50 persons or part thereof |
-- | Nil upto 6 persons One for 7-20 persons Two for 21-45 persons |
-- |
| 4. | Wash Basins |
One for every 200 persons or part thereof. For over 400 persons, add at the rate of 1 per 250 persons or part thereof. |
One for every 200 persons or part thereof. For over 200 persons, add at the rate of 1 per 150 persons or part thereof |
One for 1-15 persons Two for 16-35 |
One for 1-12 persons Two for 13-25 persons |
| 5. | Cleaner’s Sink |
One per floor, minimum | |||
| 6. | Drinking Water Fountain |
One per 100 persons or part thereof | |||
Note: It may be assumed that two thirds of the numbers are males and one third females.
Table 5.13 Sanitation Requirements for Restaurant
| SI.No. | Sanitary Unit | For Public | For Staff | ||
| Male | Female | Male | Female | ||
| 1. | Water Closet (W.C.) |
One per 50 seats upto 200 seats. For over 200 seats, add at the rate of 1 per 100 seats or part thereof |
One per 50 seats upto 200 seats. For over 200 seats, add at the rate of 1 per 100 seats or part thereof |
1 for 15 persons. 2 for 16-35 persons. 3 for 36-65 persons. 4 for 66-100 persons. |
1 per 1-12 persons. 2 for 13-25 persons. 3 for 26-40 persons. 4 for 41-57 persons. 5 for 58-77 persons. 6for 78-100. persons. |
| 2. | Ablution Taps |
One in each W.C. |
One in each W.C. |
One in each W.C. |
One in each W.C. |
| 3. | Urinals | One for 50 persons or part thereof |
-- | Nil upto 6 persons. 1 for 7-20 persons. 2 for 21-45 persons. 3 for 46-70 persons. 4 for 71-100 persons. |
-- |
| 4. | Wash Basin | One for every water closet | |||
| 5. | Kitchen Sinks & Dish Washer |
One per each Kitchen | |||
| 6. | Service Sink |
One in the restaurant | |||
Note: - ( i) It may be assumed that two thirds of the numbers are males and one-third females.
(ii) One water tap with draining arrangements shall be provided for every 50 persons or part thereof in the vicinity of water closets and urinal.
Table: -5.14 Sanitation Requirements for Factories
| SI.No. | Snitary Unit | For Male Personnel | For Female Personnel |
| 1. | Water Closet | 1 for 15 persons 2 for 16-35 persons 3 for 36-65 persons. 4 for 66-100 persons. For 101 to 200 persons add at rate of 3%. From over 200 persons, add at the rate of 2.5%. |
1 for 1-12 persons 1 for 13-25 persons. 2 for 26-40 persons. 3 for 41-57 persons. 4 for 58-77 persons. 5 for 78-100 persons. For 101 to 200 persons, add at the rate of 5%. From over 200 persons add at the rate of 4%. |
| 2. | Ablution Taps | One in each W.C | One in each W.C |
| 3. | Urinals | Nil upto 6 persons 1 for 7-20 persons 2 for 21-45 persons 3 for 46-70 persons 4 for 71-100 persons From 101 to 200 persons add at the rate of 3%; for over 200 persons add at the rate of 2.5%. |
-- |
| 4. | Washing Taps with draining arrangement |
One for every 25 persons or part thereof | |
| 5. | Drinking Water Fountains |
One for every 100 persons with a minimum of one on each floor |
|
| 6. | Baths Preferably Showers |
As required for particular trade or occupation | |
Note: (i) For many trades of a dirty or dangerous character, more extensive provisions are required.
(ii) One water tap with draining arrangement shall be provided for every 50 persons or part thereof in the vicinity of water closet and urinal
(iii) Crèches where provided shall be fitted with water closets (One for 10 persons or part thereof), wash basins (1 for 15 persons or part thereof) and drinking water tap with drinking arrangement for every 50 persons or part thereof
Table 5.15 Sanitary Requirements for Large Stations and Airports
| SI.No. | Place | W.C. for Males | W.C. for Females | Urinals for Males only |
| 1. | Junction Stations, Intermediate Stations and Substations |
3 for first 1000 persons and 1 for subsequent 1000 persons or part thereof. |
4 for first 100 persons and 1 for every additional 1000 persons or part thereof. |
4 for every 1000 person and 1 for every additional 1000 persons or part thereof. |
| 2. | Terminal Stations and Bus Terminals |
4 for first 1000 persons and 1 for every additional 1000 persons or part thereof. |
5 for every 1000 person and 1 for every additional 200 persons or part thereof. |
6 for every 1000 person and 1 for every additional 1000 persons or part thereof. |
| 3. | Domestic Airports Minimum. For 200 persons For 400 persons For 600 persons For 800 persons For 1000 persons |
2* 5 9 12 16 18 |
4* 8 15 20 26 29 |
2* 6 12 16 20 22 |
| 4. | Internal Airports For 200 persons For 600 persons For 1000 persons |
6 12 18 |
10 20 29 |
8 16 22 |
Note: i) Provision for wash basins, baths including shower stalls, shall be in accordance with part ix section 2- Drainage and Sanitation of National Building Code of India, 2005.
* At least one Indian style water closet shall be provided in each toilet. Assume 60 % males and 40 % females in any area.
Notes for General Guidance for water supply arrangements:
(1) For new construction: Provision shall be made for under ground tank for the storage of water, having capacity at 200 litres. per person with adequate pumping arrangements to supply water to upper floors. Filtered water connection
will be allowed only for use of drinking and bathing needs. For other purposes i.e. flushing and gardening etc., the individual shall be required to have own arrangements of tube well water within the premises. While according sanction
to Layout Plan, the Authority shall make a special mention that provision for space shall be kept for the construction of under ground reservoir of adequate capacity along with booster pumping station.
(2) Arrangements as given in 1 above shall also be provided in Group Housing Societies.
(3) The plumbing arrangement in case of new constructions shall be made in such a way that the potable water shall be used for drinking, cooking & bathing only and for rest of the uses, provision for ground water can be made wit
dual piping system.
(4) Low capacity cistern should preferably be provided instead of normal 12.5 litre capacity.
(5) Water Harvesting: Water harvesting through storing of water runoff including rainwater in all new buildings on plots of 100 sq m. and above will be mandatory. The plans submitted to the local bodies shall indicate the system of
storm water drainage along with points of collection of rain water in surface reservoirs or in recharge wells.
(6) All building having a minimum discharge of 10,000 litres and above per day shall incorporate waste water recycling system. The recycled water should be used for horticultural purposes.
(7) Installation of Solar Assisted Water Heating System in Buildings:
(i) No new building in the following categories in which there is a system of installation for supplying hot water shall be built unless the system of the installation is also having an auxiliary solar assisted water heating system:-
(a) Hospitals and Nursing Home
(b) Hotels, Lodges, and Guest Houses, Group Housing with the plot area of 4000 sq m.
(c) Hostels of Schools, Colleges and Training Centres with more than 100 Students.
(d) Barracks of armed forces, paramilitary forces and police
(e) Individual residential buildings having more than 150 sq m. plinth area
(f) Functional Buildings of Railway Stations and Air Ports like waiting rooms, retiring rooms, rest rooms, inspection bungalows and catering units
(g) Community Centres, Banquet Halls, Baratghars, Mangal Karyalayas and buildings for similar use.
(i) Definitions
(i) “Solar Assisted Water Heating System:- A device to heat water using solar
energy as heat source.
(ii) “Auxiliary back up”:- Electricity operated or fuel fired
boilers/systems to heat water
coming out from solar water heating
system to meet continuous
requirement of hot water.
(iii) “New Building”:- Such buildings of above said
categories for which construction
plans have been submitted to the
Authority for clearance.
(iv) “Existing building”:- Such buildings, which are licensed
to perform their respective business
(ii) Installation of Solar Water Heating System
(a) New Buildings: Clearance of plan for the construction of new buildings of the aforesaid categories shall only be given if they have a provision in the building design itself for an insulated pipeline from the rooftop in the building to
various distribution points where hot water is required. The building must have a provision for continuous water supply to the solar water heating system. The building should also have open space on the rooftop, which receives direct
sun light. The load bearing capacity of the roof should at least be 50 kg. per sq m. All new buildings of above said categories must complete installation of solar water heating systems before obtaining necessary license to commence
their business.
(b) Existing Buildings: Installation of Solar Assisted Water Heating Systems in the existing building shall be made mandatory at the time of change of use to above said category provided there is a system or installation for supplying
hot water.
(iii) Capacity: The capacity of solar water heating system to be installed on the building of different categories shall be decided in consultation with the local bodies. The recommended minimum capacity shall not be less than 25 litres
per day for each bathroom and kitchen subject to the condition that maximum of 50% of the total roof area is provided with the system.
(iv) Specifications: Installation of Solar Assisted Water Heating Systems shall conform to BIS specification IS 12933. The solar collectors used in the system shall have the BIS certification mark.
(v) Auxiliary System: Wherever hot water requirement is continuous, auxiliary heating arrangement either with electric elements or oil of adequate capacity may be provided
*****