IS 3370 -1967 Code Book PDF free download
This Indian Standard ( Part IV ) was adopted by the Indian Standards Institution on 7 December 1967, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council. The need for a code covering the design and construction of reinforced concrete and prepossessed concrete structures for the star-age of liquids has been long felt in this country. So far, such structures have been designed to varying standards adapted from the recommendations of the Institution of Civil Engineers and of the Portland Cement Association with the result that the resultant structures cannot be guaranteed to possess a uniform safety margin and dependability. Moreover, the design and construction methods in reinforced concrete and prepossessed concrete are influenced by the prevail construction practices, the physical properties of the materials and the climatic conditions. The need. was, therefore, felt to lay down uniform requirements of structures for the storage of liquids giving due consideration to these factors. In order to fulfill this need, formulation of this Indian Standard code of practice for concrete structures for the storage of liquids ( IS : 3370 ) was undertaken. This part deals with design tables for rectangular and cylindrical concrete structures for storage of liquids. The other parts of the code are the following: Part I General requirements Part II Reinforced concrete structures Part III Prepossessed concrete structures The object of the design tables covered in this part is mainly to present data for ready reference of designers and as an aid to speedy design calculations. The designer is, however, free to adopt any method of design depending upon his own discretion and judgement provided the requirements regarding Parts I to III of IS : 3370 are complied wrath and the structural adequacy and safety are ensured. Tables relating to design of rectangular as well as cylindrical tanks have been given and by proper combination of various tables it may be possible to design different types of tanks involving many sets of conditions for rectangular and cylindrical containers built in or on ground. Some of the data presented for design of rectangular tanks may be used for design of some of the earth retaining structures subject to earth ‘pressure for which a hydro static type of loading may be substituted in the design calculations. The data for rectangular tanks may also be applied to design of circular reservoirs of large diameter in which trilateral stability depends on the action of counter forts built integrally with the wall. While the common methods of design and construction have been covered in this code, design of structures of special forms or in unusual circumstances should be left to the judgement of the engineer and in such cases special systems of design and construction may be permitted on production of satisfactory evidence rearrange analysis or test or by both. their adequacy and safety by In this standard it has been assumed that the design of liquid retaining structures, whether of plain, reinforced or prepossessed concrete is entrusted to a qualified engineer and that the execution of the work is carried out under the direction of an experienced supervisor. All requirements of IS : 456-1964* and IS : 1343-19607, in so far as they apply, shall be, deemed to form part of this code except where otherwise laid down in this code.The Sectional Committee responsible for the preparation of this standard has taken into consideration the views of engineers and technologists and has related the standard to the practices followed in the country in this field. Due weight age has also been given to the need for international coordination among the standards prevailing in different countries of the world. These considerations led the Sectional Committee to assistance from published materials of the following organizations: British Standards Institution; Institution of Civil Engineers, London; and Portland Cement Association, Chicago, USA. Res have been reproduced from “Rectangular Concrete Tanks ’ and ‘ Circular Concrete Tanks without Prepossessing ’ by courtesy of Portland Cement Association, USA. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : Z-1960$. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
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