STRUCTURAL SAFETY AND SERVICES
41. STRUCTURAL DESIGN
41.1. The structural design of foundations, elements made of masonry, timber, plain concrete, pre-stressed concrete and structural steel shall be carried out in accordance with Part IV, structural Design, Section 1- Loads, Section 2- Foundation, Concrete, Section -3 Wood, Section 4 – Masonry, Section 5 – Concrete, Section 6 – Steel, of National Building Code of India, 2005 taking into consideration the Indian Standards and Guidelines for hazard safety a given below:
a. For Earthquake Protection
(i) IS:1893 -1984, ‘Criteria for Earthquake Resistant Design of Structures (Fourth Revision)
(ii) IS: 13920-1993, “Ductile Detailing of Reinforced Concrete Structures subjected to Seismic Forces –Code of Practice”.
(iii) IS: 4326-1993, “Earthquake Resistant Design and Construction of Buildings – Code of Practice (Second Revision)
(iv) IS:13828 -1993, “Improving Earthquake Resistance of Low Strength Masonry Buildings Guideline”
(v) IS: 13827 -1993, “Improving Earthquake Resistance of Earthen Buildings –Guideline”.
(vi) IS:13935-1993, “Repair and Seismic Strengthening of Buildings – Guideline” (vii) “Improving Earthquake Resistance of Housing Guidelines”, by Expert Group, Government of India, Ministry of Urban Affairs & Employment, published by Building Material and Technology Promotion Council, 1998
b. For Cyclone /Wind Storm Protection
(i) IS: 875 Part (3) -1987 “Code of Practice for Design Loads (other than Earthquake) for Building and Structures. Part 3: Wind Loads”
(ii) “Improving Wind /Cyclone Resistance Housing Guideline“ by Expert Group, Government of India, Ministry of Urban Affairs & Employment, published by Building Materials and Technology Promotion Council, 1998
Note: Wherever an Indian Standard including those referred in the National Building Code is referred, the latest version of the same shall be followed. In pursuance of the above a certificate as indicated below shall be submitted along with building plans/drawings and building information schedule annexed thereto.
41.2. Structural Stability and Fire Safety of Existing Buildings
a. The Competent Authority on its own or otherwise may have the assessment of structural and/or fire safety of an existing building/structure damaged/ undamaged carried out through expert(s) chosen from a panel of experts identified by the Competent Authority in this behalf, at the cost of the owner/developer/occupants of the building. b. The Competent Authority on advice of such expert(s) shall direct the owner /developer /occupants of the building to carry out such repair/restoration and strengthening /retrofitting of the building found necessary so as to comply with the safety standards laid down in the National Building Code and the Indian Standards specified under Regulation. c. The Competent Authority shall specify the period within which such compliance is to be carried out. d. The Competent Authority may also direct the owner/developer /occupants whether the building could be occupied or not during the period of compliance.
41.3. Quality Control Requirement
The following quality control system shall be adopted for all buildings except those up to 3 storied residential buildings having less than 1000 sqm in built up area.
The testing of the material as per Indian Standards shall be carried out by laboratory(s) approved by the competent authority in this behalf. The laboratory(s) shall work out in consultation with the construction agency a testing programme of materials such as cement, steel and quality of concrete including its mixing, laying and strength at site as well as in the laboratory. This should cover various stages of construction from foundation to completion as per Regulations. The laboratory(s) shall maintain a duly authenticated report in a bound register, copy of which will be submitted to the construction agency, which will in turn forwards the testing report to the competent authority.
41.4. Quality of Materials & Workmanship
41.4.1. All materials and workmanship shall be of good quality conforming generally to accepted standards of Public Works Department of Administration and Indian Standard Specifications and Codes as included in Part-V - Building Materials and Part VII – Constructional Practices and Safety of National Building Code of India, 2005.
41.4.2. All borrow pits dug in the course of construction and repair of buildings, roads, embankments, etc. shall be deep and connected with each other in the formation of a drain directed towards the lowest level and properly stopped for discharge into a river stream, channel or drain and no person shall create any isolated borrow pit which is likely to cause accumulation of water which may breed mosquitoes.
41.5. Alternative Materials, Methods of Design and Construction & Tests. The provision of the rules are not intended to prevent the use of any material or method of design or intended to prevent the use of any material or method of design or construction not specifically prescribed by the rules provided any such alternative has been approved.
41.6. The provisions of the rules are not intended to prevent the adopting of architectural planning and layout conceived as an integrated development scheme.
41.7. The Authority may approve any such alternative, provided it is found that the proposed alternative is satisfactory and conforms to the provisions of relevant parts regarding material, design and construction and that material, method or work offered is for the purpose intended, atleast equivalent to that prescribed in the rules in quality, strength, compatibility, effectiveness, fire and resistance, durability and safety.
41.8.1. Whenever there is sufficient evidence of compliance with the provisions of the rules of evidence that material or method of design or construction does not conform to the requirements of the rules or in order to substantiate claims of alternative materials, design or methods of construction, the Authority may require tests sufficiently in advance as proof of compliance. These tests shall be made by an approved agency at the expenses of the owner/applicant.
41.8.2. Test methods shall be as specified by the rules for the materials or design or construction in question. If there are no appropriate test methods specified in the rules, the Authority shall determine the test procedure. For methods of tests for building materials, reference may be made to relevant Indian Standards as given in the National Building Code of India, published by the Indian Standard Institution. The Latest version of the National Building Code of India shall be taken into account at the time of enforcement of these rules.
41.9. Building Services
41.9.1. The planning, design and installation of electrical installations, airconditioning and hearting work shall be carried out in accordance with Part VIII Building Services, Section 2-Electrical installations, Section 3- Air Conditioning and Heating of National Building Code of India, 2005.
41.9.2. The planning, design including the number of lifts, type of lifts, capacity of lifts depending on occupancy of building, population on each floor based on occupant load, height of buildings shall be in accordance with Section -5- Installation of Lifts and Escalators of National Building Code of India, 2005 in existing buildings, in case of proposal for one additional floor, existing lift may not be raised to the additional floor.
41.10. Requirement of Water Supply, Drainage and Sanitation:
The requirements for water supply, drainage and sanitation would as per the norms provided in Part IX Plumbing Services, Section 1 – Water Supply; and Section 2 – Drainage and Sanitation of the National Building Code of India, 2005, Bureau of Indian Standards.
41.10.1. Septic Tanks:
Where septic tank is used for sewage disposal, the location, design and construction of the septic tank shall conform to requirements as below.
a. Location of Septic Tanks and sub-surface absorption systems: A subsoil dispersion system shall not be closer than 18 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 6 m. to avoid damage to the structures. The dimensions of Septic Tanks shall have minimum width of 75 cm. minimum depth of one metre below water level and a minimum liquid capacity of one cubic metre.
b. Septic tanks may be constructed of brickwork, stone masonry concrete or other suitable materials as approved by the Authority
c. Under no circumstances should effluent from a septic tank be allowed into an open channel, drain or body of water without adequate anaerobic treatment through soak pit.
d. Minimum nominal diameter of pipe shall be 100 mm. Further, at junctions of pipes in manholes, direction of flow from a branch connection should not take an angle exceeding 45 degrees with the direction of flow in the main pipe.
e. The gradients of land drains, under-drainage as well as the bottom of dispersion trenches and soak ways should be between 1:300 and 1:400.
f. Every septic tank shall be provided with ventilating pipe of atleast 50 mm diameter. The top of the pipe shall be provided with a suitable cage of mosquito-proof wire mesh.
g. When the disposal of septic tanks effluent is to seepage pit, the seepage pit may be of any suitable shape with the least cross-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 the RCC cover slabs. Where 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 surface run off. The inlet pipe may be taken down a depth of 90 cm. from top as an anti-mosquito measure. h. When the disposal of septic tank effluent is to a dispersion trench, the dispersion trench shall be 50 to 100 cm. wide excavated to a slight gradient and shall be provided with 15 to 25 cm. of washed gravel or crushed stoners. Open jointed pipes placed inside the trench shall be made of unglazed earthenware clay or concrete and shall have minimum internal diameter of 75 to 100 mm. Each dispersion trench should not be longer than 30 m. and trenches should not be placed closer than 1.8 m.
41.11. Signs and Outdoor display structure
The display of advertising signs on building and land shall be in accordance with Part (c), Signs and Outdoor Display Structures of National Buildings Code of India, 2005 and the provisions detailed below.
41.11.1. Prohibition of erection, fixation, retention of display of advertisements: No person shall erect, exhibit, fix or retain upon or over any land, building, wall, hoarding, frame, post, kiosk /Bill Board (to be displayed on electric pole) or structure or upon or in any vehicle, any advertisement or display any advertisement to public view in any manner whatsoever in any place within the jurisdiction of the Administration without the prior written permission of the Authority and/or any other authorized person(s) for the purpose.
41.11.2. Prohibition of erection, exhibition, fixation, retention or display of advertisements in historic public buildings etc.: No person shall erect, exhibit, fix, retain or display or case to be erected, exhibited, fixed, retained or displayed any advertisement so as to injuriously affect the amenities or obstruct the view of any historic public building or buildings of national importance or monument of any public park or pleasure promenade or public garden.
41.11.3. Prohibition of advertisements by balloons or banners: No balloons or banners shall be allowed for advertisement except after the prior approval of the Authority.
41.11.4. Advertisement on un-authorized building: The permission granted for display of an advertisement on an unauthorized building, structure, wall, etc. shall not amount to regularization of the said unauthorized building, structure, wall, etc. and such permission shall not be a ground for regularization of the same.
41.11.5. Manner of display of advertisement on vehicles: No vehicle used for the purpose of advertisement shall display any advertisement in a manner, from or method different from that approved by the Authority.
41.11.6. Defacement of any sign or make or letter on advertisement prohibited: No person shall deface or cause to be defaced any sign or mark or letter or words that shall have been put by the Authority on the advertisements erected, exhibited, fixed, retained or displayed in token of their having been permitted or approved by him/her and of the tax having been collected thereon.
41.11.7. Advertisement hoarding:
a. Shall not be more than 9.144 meters (30’) high from the ground level. No hoarding shall be permitted on roof-tops or terraces
b. Shall not project, or be on or over the public way beyond the general line of buildings in the street for which a regular line of street has been prescribed;
c. Shall not exceed the size approved by the Authority;
d. Shall not be put up or erected in the right of way of any road;
Provided that advertisement hoarding may be put up or erected adjacent to, or near the foot-paths of the roads if such hoardings run parallel to the road and/or otherwise permitted by the Authority. The base or the bottom of the hoarding shall be at a height of 2.133 meters (7”) above the ground level and shall be in proper alignment, height to conform with other hoardings and at a distance of minimum of 0.61 meters (2”) from any other hoardings.
41.11.8. Procedure for grant of permission for erection, exhibition, fixation, retention or display of advertisements:
a. Every person desiring to erect, exhibit, fix, retain or display an advertisement shall send or cause to be sent to the Authority an application for permission in the prescribed format as per Annexure 20 against payment of fees as prescribed by the Authority. The said application form duly completed in all respects shall be submitted or cause to be submitted by the applicant against a proper receipt. The Authority may after making such inspection as may be necessary and within thirty days after the receipt of the application, grant, refuse, renew or cancel the permission, as the case may be, in accordance with the provisions of the Act and the by-laws made hereunder.
b. The Authority may disapprove an advertisement on, among others, the ground that its contents or the manner of its display is indecent or otherwise offensive to good taste or public sentiments.
c. No application shall be valid until and unless it is submitted in the manner determined by the Authority from time to time on the prescribed format along with all the documents as are required by the Authority from time to time and fee of Rupees One Hundred against proper receipt obtained from the Administration. Any application submitted in any other manner shall be deemed to be rejected without any notice and no person shall exhibit, erect, fix or retain upon or over any land, building, wall etc. any advertisement and display any advertisement to public view on the basis of the same.
d. If any tax on advertisements and penalty is not paid within stipulated time after the demand notice, the same shall be recoverable as arrears of tax and the permission shall be deemed to be terminated. The Authority shall be at liberty to remove the hoardings, etc.
e. If any advertisement erected, exhibited, fixed or retained on any land and building unauthorisedly and in contravention of provisions of the Act and the bye-laws framed hereunder, such advertisements or hoardings shall be removed by the Authority without any notice whatsoever and expenses regarding removal of such unauthorized advertisement or hoardings shall be recovered from the concerned advertiser or exhibitor or client at the rate of Rupees Five Thousand per advertisement or hoarding for sizes upto 18.580 Sq.Meters (200 Sq.Feet) and Rupees Ten Thousand for sizes larger than 18.580 Sq.Meters (200 Sq.Feet).
41.11.9. Tax to be paid in advance:
The tax on each advertisement shall be payable in advance for the concerned financial year. All dues shall be payable in cash or by pay order or by demand draft.
41.11.10. Licensed or registered advertisers:
No person except licensed or registered advertisers or agencies shall be allowed to undertake the display of advertisements on behalf of others. Persons or agencies who undertake the display of advertisement, shall enroll themselves as licensed or registered advertisers with the Administration and furnish in this regard the required information, documents, surety, as may be determined by the Authority. They shall pay license or registration fee and security deposit as may be determined by the Authority from time to time in respect of registration as advertiser.
a. Persons intending to entrust the work of displaying advertisement on their behalf to other party shall not entrust it to any party other than a licensed or registered advertiser.
b. A licensed or registered advertiser shall before displaying or causing the display of advertisement, satisfy himself that the tax due thereon has been paid and the Authority’s approval obtained there for.
c. A licensed or registered advertiser shall maintain proper record of advertisements displayed by him and produce the same whenever required for inspection by the Authority.
41.11.11. Penalty: Whoever contravenes any provision of the Act, the Bye-laws and the terms and conditions on the subject or fails to comply with the order or directions lawfully given, shall be punishable with a fine which may extend to Rupees Ten Thousand and in case of a continuing contravention with a further fine which may extend to Rupees Five Hundred for every day during which such contravention is continued after conviction for the first such contravention.
If the contravention still continues, the Authority shall require the owner or occupier of the land, wall, hoarding, frame, post or vehicle upon or over or in which the same is erected, exhibited, fixed or retained to take down or remove such advertisements or enter any land, building, property or vehicle and have the advertisement dismantled, taken down or removed or spoiled, defaced or screened. The authority may, also take any other action including blacklisting of the defaulting agency of advertise as the Authority may decide.
41.11.12. The following additional provisions shall be complied with for permitting advertising signs.
a. In Residential Zone the following non-flashing and non-neon signs with illumination not exceeding 10 Ft. candles
(i) One name plate with an area not exceeding 0.1 sq.m for each dwelling unit.
(ii) For other users permissible in the zone one identification sign or bulleting board with an area not exceeding 1.6 Sq.m.
(iii) ‘For Sale’ or ‘For Rent’ signs for real estate not exceeding 2 sq.m. in area provided they are located on the premises offered for sale or rent. b. In Commercial Zones, flashing or non-flashing business signs place flat against the wall, not exceeding 5 sq.m. in area and covering not more than 15 percent of the area of such wall including doors and windows and overhanging signs which project not more than 0.9 m. from the wall, provided that such overhanging signs shall be in conformity with the following and provided that such signs do not face resident buildings
c. Not more than one overhanging sign may be permitted for each 4.5 m. of plot frontage and the area of such overhanging signs shall not be more than 1 sq.m except that for each 9.0 m. of plot frontage above the first 4.5 m. an increase in area of 0.2 sq.m shall be permitted.