STRUCTURAL SAFETY



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.)


 
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

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