BS 8666:2020 - The Ultimate Guide to Rebar Shape Codes and Scheduling
BS 8666:2020 - A Comprehensive Guide to Steel Reinforcement for Concrete
BS 8666:2020 is the latest British Standard for scheduling, dimensioning, cutting and bending of steel reinforcement for concrete. It is a vital document for anyone involved in the design, construction or inspection of reinforced concrete structures. In this article, we will explain what BS 8666:2020 covers, why it is important, and how to use it correctly.
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What is BS 8666:2020?
BS 8666:2020 is a revision of the previous standard BS 8666:2005, which was published in 2005. The new standard updates the requirements for steel reinforcement to align with the Eurocode 2 (BS EN 1992-1-1), which is the European standard for the design of concrete structures. BS 8666:2020 also incorporates some changes and clarifications based on feedback from users and industry experts.
BS 8666:2020 specifies the following aspects of steel reinforcement:
The notation and symbols used to describe the shape, size and length of bars and fabric;
The form and content of schedules and labels for bars and fabric;
The dimensions and tolerances for cutting and bending of bars and fabric;
The minimum radius of bending and mandrel diameter for bars;
The fabrication and routine inspection of bars and fabric;
The audit testing and factory control of processed coil product.
BS 8666:2020 applies to steel reinforcement conforming to BS 4449, BS 4483 and BS 6744, which are the British Standards for carbon steel bars, welded fabric and stainless steel bars respectively. It also applies to steel reinforcement designed to BS EN 1992-1-1, BS EN 1992-2, BS EN 1992-3 and BS 8110, which are the British Standards for the design of concrete structures in general, bridges, liquid retaining structures and buildings respectively.
Why is BS 8666:2020 important?
BS 8666:2020 is important because it ensures that steel reinforcement is scheduled, dimensioned, cut and bent in a consistent and accurate manner, which is essential for the structural performance and durability of reinforced concrete structures. By following BS 8666:2020, designers, contractors and inspectors can avoid errors, confusion and disputes that may arise from using different or outdated methods of specifying steel reinforcement.
BS 8666:2020 also helps to achieve compliance with the Eurocode 2, which is the harmonized European standard for the design of concrete structures. By using BS 8666:2020, designers can ensure that their reinforcement details are compatible with the Eurocode 2 requirements and assumptions. This facilitates the exchange of information and collaboration among different parties involved in the design and construction of reinforced concrete structures across Europe.
How to use BS 8666:2020?
BS 8666:2020 provides a set of standard shape codes and tables that can be used to specify the shape, size and length of bars and fabric. These shape codes and tables are based on geometric principles and allow for some flexibility in dimensioning. The standard also provides guidance on how to schedule, label, cut and bend bars and fabric according to the specified shape codes.
To use BS 8666:2020 effectively, designers should follow these steps:
Select the appropriate shape code from Table 5 for each bar or group of bars;
Determine the dimensions of each bar or group of bars using the method of measurement given in Table 5;
Calculate the total length of each bar or group of bars using the formula given in Table 5;
Prepare a schedule for each bar or group of bars using the form given in Figure 1;
Prepare a label for each bar or group of bars using the form given in Figure 1;
Check that the scheduled dimensions comply with the minimum scheduling radii, mandrel diameters and end projections given in Table 2;
Check that the scheduled dimensions allow for possible deviations between two concrete faces using Table 3;
Check that the scheduled dimensions allow for minimum allowances between two bends using Table 4.
To use BS 8666:2020 effectively, contractors should follow these steps:
Receive the schedules and labels from the designer or supplier;
Cut and bend each bar or group of bars according to the scheduled dimensions;
Check that the cut and bent dimensions comply with the allowable deviations given in Table 7;
Check that the cut and bent dimensions comply with the maximum limit for which a preformed radius is required given in Table 8;
Bend fabric reinforcement according to Figure 8 if required;
Attach labels to each bar or group of bars according to Figure 1;
Inspect each bar or group of bars according to Table 9.
Where to download BS 8666:2020?
BS 8666:2020 is available for purchase from the BSI website, where you can also find other related standards and publications. Alternatively, you can download a free PDF version of BS 8666:2020 from various online sources, such as Scribd, EPDFX and CADS UK. However, you should be careful about the quality and authenticity of these downloads, as they may not be updated or accurate.
Downloading BS 8666:2020 can help you to access the standard anytime and anywhere, without the need for an internet connection or a physical copy. However, you should also be aware of the copyright and licensing issues that may arise from downloading BS 8666:2020 without permission or payment. You should always respect the intellectual property rights of the BSI and other authors, and use BS 8666:2020 in a lawful and ethical manner.
How to learn more about BS 8666:2020?
If you want to learn more about BS 8666:2020 and how to apply it in practice, you can find various resources and guidance online. For example, you can visit the Heaton Manufacturing website, where you can find a comprehensive guide to rebar shape codes and scheduling, as well as a free rebar schedule template. You can also watch some videos on YouTube that explain the basics of BS 8666:2020 and show some examples of rebar cutting and bending.
Another way to learn more about BS 8666:2020 is to attend some training courses or workshops that cover the standard in detail. You can search for such courses or workshops on the internet, or contact your local BSI office or representative for more information. By attending these courses or workshops, you can gain more knowledge and skills on how to use BS 8666:2020 effectively and efficiently.
What are the benefits of BS 8666:2020?
BS 8666:2020 has several benefits for the users and stakeholders of steel reinforcement for concrete. Some of these benefits are:
It provides a clear and consistent method of specifying steel reinforcement, which reduces errors, confusion and disputes;
It ensures that steel reinforcement is cut and bent in a precise and accurate manner, which improves the structural performance and durability of reinforced concrete structures;
It facilitates the compliance with the Eurocode 2, which is the harmonized European standard for the design of concrete structures;
It supports the innovation and development of new products and technologies for steel reinforcement;
It promotes the sustainability and efficiency of steel reinforcement by minimizing waste and optimizing material usage.
What are the challenges of BS 8666:2020?
BS 8666:2020 also poses some challenges for the users and stakeholders of steel reinforcement for concrete. Some of these challenges are:
It requires some changes and adaptations from the previous standard BS 8666:2005, which may involve some costs and efforts;
It requires some training and education for the users to understand and apply the standard correctly;
It requires some coordination and communication among different parties involved in the design and construction of reinforced concrete structures to ensure consistency and accuracy;
It requires some monitoring and evaluation to ensure that the standard is implemented effectively and efficiently.
How to download BS 8666:2020 for free?
If you are looking for a free download of BS 8666:2020, you may be disappointed to find out that there is no official or legal way to do so. The BSI website only offers the standard for purchase, either as a hard copy or a PDF file. The price of the standard varies depending on the format and the delivery method, but it is usually around 200.
However, there are some unofficial and illegal ways to download BS 8666:2020 for free, such as using file-sharing websites, torrent sites or online converters. These methods may seem tempting, but they come with many risks and drawbacks. Some of these are:
You may download a corrupted, outdated or incomplete version of the standard, which may compromise the quality and accuracy of your work;
You may download a virus, malware or spyware along with the standard, which may harm your computer or device;
You may infringe the copyright and licensing rights of the BSI and other authors, which may result in legal actions or penalties;
You may violate the ethical and professional standards of your industry, which may damage your reputation and credibility.
Therefore, we strongly advise you not to download BS 8666:2020 for free, but rather to purchase it from the BSI website or other authorized sources. This way, you can ensure that you get a valid, updated and complete version of the standard, which will help you to achieve the best results for your projects.
How to compare BS 8666:2020 with BS 8666:2005?
BS 8666:2020 is a revision of the previous standard BS 8666:2005, which was published in 2005. The main purpose of the revision was to update the standard to align with the Eurocode 2, which is the European standard for the design of concrete structures. However, there are also some other changes and clarifications that were made based on feedback from users and industry experts.
To compare BS 8666:2020 with BS 8666:2005, you can use the following sources:
The BSI website, where you can find a summary of the main changes and a comparison table between the two standards;
The Heaton Manufacturing website, where you can find a detailed guide to rebar shape codes and scheduling, as well as a free rebar schedule template that complies with both standards;
The CADS UK website, where you can find a PDF document that shows the shape codes and dimensions for both standards;
The BSI Shop, where you can purchase both standards and compare them side by side.
By comparing BS 8666:2020 with BS 8666:2005, you can understand the differences and similarities between the two standards, and how they affect your work. You can also identify the areas where you need to make some changes or adaptations to comply with the new standard.
Conclusion
BS 8666:2020 is the latest British Standard for scheduling, dimensioning, cutting and bending of steel reinforcement for concrete. It is a vital document for anyone involved in the design, construction or inspection of reinforced concrete structures. It provides a clear and consistent method of specifying steel reinforcement, which ensures its structural performance and durability. It also facilitates the compliance with the Eurocode 2, which is the harmonized European standard for the design of concrete structures.
In this article, we have explained what BS 8666:2020 covers, why it is important, and how to use it correctly. We have also provided some resources and guidance on how to download, learn and compare the standard with the previous version. We hope that this article has been helpful and informative for you, and that you will be able to apply BS 8666:2020 in your projects with confidence and ease. ca3e7ad8fd