IS 456

IS 456-2000 Plain and Reinforced Concrete - Code of Practice is an Indian Standard code of practice for general structural use of plain and reinforced concrete. The latest revision of this standard was done in year 2000, reaffirmed 2005. This code uses the limit state design approach. It is written for use in India. It gives extensive information on the various aspects of concrete. IS 456 is considered as the Bible for Civil Engineers in India.

It contains five sections and eight annexures:

• Section 1: General
• Section 2: Materials, Workmanship, Inspection and Testing
• Section 3: General Design Considerations
• Section 4: Special Design Requirements for Structural Members and Systems
• Section 5: Structural Design (Limit State Method)

The structural practice handbook SP:16-1980 Design Aids for Reinforced Concrete to IS:456-1978 has tables and charts that helps structural engineers to rapidly design simple sections. Even though the design aid is based on the 1978 code, it continues to be used without revision as there have been no major changes to Section 5, on which the design aid is based.

The IS 456:2000 must be read along with other Indian Standard codes which supplement it:

• IS:13920-1993 (Reaffirmed 1998) Ductile Detailing of Reinforced Concrete Structures subjected to Seismic Forces - Code of Practice
• SP:34-1987 Handbook on Concrete Reinforcement and Detailing (This handbook needs to be revised based on the changes to the detailing clauses of IS:456-2000)

Abhijeet Devi.

External links

• IS 456

5.3 Aggregates Aggregates shall comply with the requirements of IS 383. As far as possible preference shall be given to natural aggregates. 5.3.1 Other types of aggregates such as slag and crushed overbumt brick or tile, which may be found suitable with regard to strength, durability of concrete and freedom from harmful effects may be used for plain concrete members, but such aggregates should not contain more than 0.5 percent of sulphates as SO, and should not absorb more than 10 percent of their own mass of water. 5.3.2 Heavy weight aggregates or light weight aggregates such as bloated clay aggregates and sintered fly ash aggregates may also be used provided the engineer-in-charge is satisfied with the data on the properties of concrete made with them. NOTE-Some of the provisions of the code would require moditication when these aggnzgates are used; specialist litemtute may be consulted for guidance.