RECOMMENDATIONS GIVEN IN THE CODE FOR PRACTICE IS :456-1978 BASED ON THE COMMENTARY PREPARED BY THE INDIAN STANDARD INSTITUTION .

To amplify the recommendations given in the code IS :456-1978 ,a commentary on the code is being prepared by the Indian Standard institution. To reduce the design time in the use of certain clauses in the code for design of beams,slabs and Columns in general building Structures SP:16-1979Design Aids for reinforced concrete to IS :456-1978 is being published.In addition , handbooks on concrete mix Design and the concrete reinforcement are being prepared.(2) The sectional Committee responsible for the preparation of this standard has taken into consideration the view points of manufacturers, users , Engineers, architects ,builders and technologists and has related the standard to the manufacturing and trade practices followed in the country in the field of experience and expertise opinion .Due weightage has also been given to the need for international coordination among Standard prevailing in the different countries of the world.(3) 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:2-1960 . The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.(4) In the code it has been assumed that the Design of plain and the reinforced cement concrete work is entrusted to a qualified Engineer and that the execution of the cement concrete work is carried out under the direction of an experienced supervisor.