IS 456 Code 2019 Free Download PDF: Everything You Need to Know
If you are a civil engineer, a contractor, a builder, or a student of civil engineering, you might have heard of IS 456 code. But what is it exactly? Why is it important? And how can you download it for free? In this article, we will answer all these questions and more. We will explain what IS 456 code is, what are its main features, and how to download it for free. We will also provide you with some useful tips and resources to help you use it effectively.
is 456 code 2019 free download pdf
What is IS 456 Code?
IS 456 code is an Indian Standard code of practice for general structural use of plain and reinforced concrete. It covers the design, construction, and maintenance of concrete structures for buildings, bridges, dams, and other civil engineering works. It is one of the most widely used codes in India and abroad.
Definition and Scope
According to IS 456 code, plain concrete is concrete without any reinforcement or prestressing. Reinforced concrete is concrete with reinforcement embedded in it in such a manner that the two materials act together in resisting forces. Prestressed concrete is concrete in which internal stresses are introduced by applying forces to tendons before or after hardening of concrete.
The code applies to both plain and reinforced concrete structures made with ordinary Portland cement or blended cements. It does not cover prestressed concrete structures or special types of concrete such as light-weight concrete, heavy-weight concrete, no-fines concrete, etc.
History and Revisions
The first edition of IS 456 code was published in 1953. It was based on the British code CP 114. The second edition was published in 1964. It was based on the British code CP 110. The third edition was published in 1978. It introduced the limit state design method as an alternative to the working stress design method. The fourth edition was published in 2000. It incorporated several amendments and revisions based on the latest research and developments in concrete technology. The latest revision of this standard was done in the year 2019. It included some changes in the clauses related to materials, durability, design, detailing, etc.
Importance and Applications
IS 456 code is important because it provides a comprehensive and uniform set of guidelines for the design, construction, and maintenance of concrete structures in India and abroad. It ensures the safety, serviceability, durability, and economy of concrete structures. It also promotes the use of good quality materials, workmanship, inspection, and testing. IS 456 code is applicable to a wide range of concrete structures for various purposes. Some of the common applications are: - Buildings: residential, commercial, industrial, institutional, etc. - Bridges: road, rail, pedestrian, etc. - Dams: gravity, arch, buttress, etc. - Water tanks: overhead, underground, etc. - Retaining walls: cantilever, counterfort, etc. - Foundations: shallow, deep, pile, etc. - Pavements: rigid, flexible, etc. What are the Main Features of IS 456 Code 2019?
IS 456 code 2019 has several features that make it a comprehensive and updated code of practice for concrete structures. Some of the main features are:
Materials, Workmanship, Inspection and Testing
The code specifies the requirements and standards for various materials used in concrete structures such as cement, aggregates, water, admixtures, reinforcement, etc. It also provides guidance on the selection and proportioning of concrete mixes based on the exposure conditions and strength requirements. It also covers the aspects of workmanship such as batching, mixing, transporting, placing, compacting, curing, etc. It also lays down the criteria and methods for inspection and testing of concrete structures such as sampling, testing frequency, acceptance criteria, etc.
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General Design Considerations
The code outlines the general principles and assumptions for the design of concrete structures such as loads and load combinations, structural analysis methods, limit states and design values, partial safety factors, serviceability requirements, durability requirements, fire resistance requirements, etc. It also gives guidance on the design of special structures such as arches, shells, folded plates, etc.
Structural Design (Limit State Method)
The code presents the limit state design method as the preferred method for the structural design of concrete structures. The limit state design method is based on the concept of limiting the stresses and deformations in the structure to acceptable levels under various load conditions. The code covers the design of various structural elements such as beams, slabs, columns, footings, walls, stairs, etc. using the limit state design method. It also provides the design charts, tables, and formulae for the calculation of the design values of various parameters such as bending moment, shear force, deflection, crack width, etc.
Structural Design (Working Stress Method)
The code also presents the working stress design method as an alternative method for the structural design of concrete structures. The working stress design method is based on the concept of ensuring that the stresses in the structure do not exceed the permissible values under various load conditions. The code covers the design of various structural elements such as beams, slabs, columns, footings, walls, stairs, etc. using the working stress design method. It also provides the design charts, tables, and formulae for the calculation of the permissible stresses and other parameters.
Special Design Requirements for Structural Members and Systems
The code also addresses the special design requirements for some structural members and systems such as deep beams, corbels, flat slabs, prestressed concrete members, composite construction, etc. It also gives guidance on the design of structures subjected to dynamic loads such as wind, earthquake, blast, etc.
Ductile Detailing of Reinforced Concrete Structures Subjected to Seismic Forces
The code also provides the provisions for the ductile detailing of reinforced concrete structures subjected to seismic forces. Ductile detailing refers to the arrangement and reinforcement of concrete members in such a way that they can undergo large deformations without collapse under seismic forces. The code specifies the minimum reinforcement ratios, spacing, anchorage, confinement, curtailment, etc. for various structural elements such as beams, columns, joints, walls, etc. to ensure ductility and energy dissipation.
How to Download IS 456 Code 2019 PDF for Free?
If you want to download IS 456 code 2019 PDF for free, you have a few options. Here are some of them:
Official Source
The official source for downloading IS 456 code 2019 PDF is the Bureau of Indian Standards (BIS) website. BIS is the national standards body of India that publishes and maintains various Indian Standards including IS 456 code. You can visit their website and search for IS 456 code 2019 in their online catalogue. You can then download it for free by registering and logging in with your email id and password. However, you should note that this is a draft version of the standard and not the final version.
Alternative Sources
If you are unable to download IS 456 code 2019 PDF from the official source or want to access the final version of the standard, you can try some alternative sources such as online libraries, e-books, blogs, forums, etc. that may have the IS 456 code 2019 PDF available for free download. However, you should be careful about the authenticity and quality of these sources and check for any errors or discrepancies in the PDF file. You should also respect the intellectual property rights of the authors and publishers and use the PDF file for personal and educational purposes only.
Precautions and Disclaimer
Before you download IS 456 code 2019 PDF for free, you should take some precautions and be aware of some disclaimer. Some of them are:
You should always check the source and date of the PDF file and make sure it is the latest and correct version of the standard.
You should always verify the contents and calculations of the PDF file with the original printed version of the standard or other reliable sources.
You should always follow the instructions and recommendations of the standard and use your own judgment and expertise in applying them to your specific project or situation.
You should always consult a qualified and experienced civil engineer or a professional body for any doubts or queries regarding the standard or its application.
You should always acknowledge the source and credit the authors and publishers of the standard when using or referring to it in your work or study.
The information provided in this article is for general guidance and reference only. It is not intended to be a substitute for professional advice or a legal document. The author and publisher of this article do not take any responsibility or liability for any errors, omissions, inaccuracies, or damages arising from the use or misuse of this article or the IS 456 code 2019 PDF file.
Conclusion
In this article, we have explained what IS 456 code is, what are its main features, and how to download it for free. We hope you have found this article useful and informative. If you have any questions or feedback, please feel free to leave a comment below. Thank you for reading!
Summary of Key Points
Here are some key points to remember from this article:
IS 456 code is an Indian Standard code of practice for general structural use of plain and reinforced concrete.
It covers the design, construction, and maintenance of concrete structures for buildings, bridges, dams, and other civil engineering works.
It is one of the most widely used codes in India and abroad.
It was first published in 1953 and has been revised several times. The latest revision was done in 2019.
It has several features such as materials, workmanship, inspection, testing, general design considerations, structural design (limit state method), structural design (working stress method), special design requirements, ductile detailing, etc.
You can download IS 456 code 2019 PDF for free from the official source (BIS website) or from some alternative sources (online libraries, e-books, blogs, forums, etc.).
You should take some precautions and be aware of some disclaimer before downloading IS 456 code 2019 PDF for free.
FAQs
Here are some frequently asked questions about IS 456 code:
What is the difference between limit state design method and working stress design method?
The limit state design method is based on the concept of limiting the stresses and deformations in the structure to acceptable levels under various load conditions. The working stress design method is based on the concept of ensuring that the stresses in the structure do not exceed the permissible values under various load conditions. The limit state design method is more rational, realistic, and economical than the working stress design method.
What are the types of limit states?
The types of limit states are strength limit states and serviceability limit states. Strength limit states are those that correspond to failure or collapse of the structure or its parts due to excessive stress or strain. Serviceability limit states are those that correspond to impairment of the performance or function of the structure or its parts due to excessive deformation, cracking, vibration, corrosion, etc.
What are the partial safety factors?
The partial safety factors are numerical factors that account for the uncertainties and variations in the material properties, loads, dimensions, etc. They are used to reduce the design values of the materials and loads to obtain the design values of the stresses and forces. The partial safety factors are different for different materials, loads, and limit states.
What are the types of reinforcement?
The types of reinforcement are mild steel, high yield strength deformed bars, hard drawn steel wire fabric, prestressing steel, and structural steel. The code specifies the properties and specifications of each type of reinforcement. The code also specifies the types of reinforcement that can be used for different structural elements and exposure conditions.
What are the types of exposure conditions?
The types of exposure conditions are mild, moderate, severe, very severe, and extreme. The exposure conditions depend on the environmental factors such as humidity, temperature, rainfall, chemicals, etc. that affect the durability of concrete structures. The code specifies the minimum cement content, maximum water-cement ratio, minimum grade of concrete, minimum cover to reinforcement, etc. for each type of exposure condition.
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