STUDY OF IS CODES
IS 456-2000 CODES FOR R.C.C STRUCTURE
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 which is used by Civil Engineers. 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)
IS-800(2007) CODES FOR STEEL STRUCTURES
The state-of-the-art design finds its way into practice through specifications and stipulations of relevant codes. In India, several development work has taken place for improving the material properties of steel, yet the design is uneconomical at times due to non-availability of efficient sections. The design codes are being updated and modified incorporating the results from the various researches and developments being carried out at the various R & D Centres in the country. IS: 800, which was prepared in 1984 and reaffirmedin 1991, was outdated. This code was based on Allowable Stress Design, which was in vogue till the 1960’s all overthe world. The more modern Limit State Method developed and adapted in advanced countries in the early 1970’s is technologically improved and results in significant economy in the completed structures. Considering that the current practice all over the world is based on Limit State Method (LSM) or Load and Resistance Factor Design Method, it was found essential during the year 2002 – 2003 that the code of practice for use of steel in general construction should be modified to LSM while maintaining Allowable Stress Design as a transition alternative. The code was thus preparedand published by the Bureau of Indian Standards (BIS) in 2008.
IS-1893 CODES FOR SESMIC ANALYSIS
This standard deals with earthquake resistant design of structures and is applicable to civil structures;elevated structures; bridges; dams etc. It also gives a map which divides the country into five seismic zones based on the seismic intensity
Consequent to the publication of this standard on account of earthquakes in various parts of the country including that in Uttar-Kashi, Latur and Bhuj and technological advancement in the field, the Sectional Committee decided to revise the standard into five parts which deals with different types of structures:
- Part 1 : General provisions and Buildings
- Part 2 : Liquid Retaining Tanks – Elevated and Ground Supported
- Part 3 : Bridges and Retaining Walls
- Part 4 : Industrial Structures Including Stack Like Structures
- Part 5 : Dams and Embankments
IS 875 PART 1 – CODES FOR DEAD LOAD
This Indian Standard (Part 1) (Second Revision) was adopted by the Bureau of Indian Standards on 30 October 1987, after the draft finalized by the Structural Safety Sectional Committee had been approved by the Civil Engineering Division Council
This code (Part 1) covers unit weight/mass of materials, and parts or components in a building that apply to the determination of dead loads in the design of buildings.
IS 875 PART 2- CODES FOR IMPOSED LOADS
This Indian Standard ( Part 2 ) ( Second Revision ) was adopted by the Bureau of Indian Standards on 31 August 1987. after the draft finalized by the Structural Safety Sectional Com-mittee had been approved by the BuildmgDivi-sion Council
This standard ( Part 2) covers imposed loads* ( live loads )to be assumed in the design of build-ings. The imposed loads, specified herein, areminimum loads which should be taken into con-sideration for the purpose of structural safety of building
IS 875 PART 3- CODES FOR WIND LOADS
This Indian Standard ( Part 3 ) ( Second Revision ) was adopted by the Bureau of Indian Standards on 13 November 1987, after the draft finalized by the Structural Safety Sectional Com- mittee had been approved by the Civil Engineer- ing Division Council.
This standard gives wind forces and their effects ( static and dynamic ) that should he taken into account when designing buildings, structures and components thereof.
IS 875 PART 4- CODES FOR SNOW LOADS
This Indian Standard ( Part4 ) ( Second Revision ) was adopted by the Bureau of Indian Standards on 9 November 1987, after the draft finalized by the Structural Safety Sectional Committee had been approved by the Civil Engineering Division Council
This standard (Part 4) deals with snow loads on roofs of buildings. Roofs should be designed for the actual load due to snow or for the &posed loads specified in Part 2 Imposed loads, whichever is more severe
IS 875 PART 5- CODES FOR SPECIAL LOADS AND COMBINATIONS
This Indian Standard ( Part 5 ) ( Second Revision ) was adopted by the Bureau of Indian Standards on 3 1 August 1987, after the draft finaliz- ed by the Structural Safety Sectional Committee had been approved by the Civil Engineering Division Council.
This code ( Part 5 ) deals with loads and load effects due to temper- ature changes, soil and hydrostatic pressures, internally generating stresses ( due to creep, shrinkage, differential settlement, etc ), accidental loads etc, to be considered in the design of buildings as appropriate. This part also includes guidance on load combinations. The nature of loads to be considered for a particular situation is to be based on engineering judgement.