NA+A2:2014 BS EN 1992-1-1:2004+A1:2014 UK National Annex to Eurocode 2. Design of concrete structures. General rules and rules for buildings
What is BS EN 1992-1-1 and NA to BS EN 1992-1-1 - Design of concrete structures?
BS EN 1992-1-1 on the design of concrete structures provides general rules for the design of structures in plain, reinforced, and prestressed concrete with specific rules for buildings.
The National Annex to BS EN 1992-1-1 provides UK decisions where national choice is allowed and it is to be read in conjunction with BS EN 1992-1-1.
What is new with BS EN 1992-1-1 - Design of concrete structures?
BS EN 1992-1-1 contains updated rules relating to shear punching resistance and ductility characteristics and also provides technical changes relating to limiting the value of punching shear capacity and creep in plain concrete walls and columns.
The National Annex to BS EN 1992-1-1 incorporates changes to National Determined Parameters and also includes a new value for the punching shear resistance of slabs and column bases with shear reinforcement. It explains UK’s particular requirements in relation to the areas covered by BS EN 1992-1-1.
The NA to BS EN 1992-1-1 also holds changes to Table NA.1 and the ‘Recommended values’ relating to BS EN 1992-1-1 and incorporates corrigenda January 2008, November 2010, February 2014, and amendment A1:2014.
The previous version of this standard saw some errors relating to shear punching resistance and ductility characteristics. As the CEN/TC 250 Structural Eurocodes Committee is preparing for the next generation of Eurocodes, there is a need to ensure that the most up-to-date and technically correct concrete Eurocode is on the market until 2020 (when the next generation of Eurocodes will be launched). No other amendments will be permitted at this time.
Who should use BS EN 1992-1-1 and NA to BS EN 1992-1-1 - Design of concrete structures?
BS EN 1992-1-1 on the design of concrete structures is an essential tool for both designers and the concrete industry, enabling them to use the most up-to-date concrete Eurocode and corresponding National Annex.
Second Generation of EN Eurocode Standards
The second generation of EN Eurocode standards is expected to be published between 2023 and 2026. These documents are being published as soon as they are available, to enable users to prepare for the transition from the first generation to second generation of Eurocodes. As set out in the National foreword of the BS EN second generation Eurocodes, UK adoptions of the first generation of Eurocodes will be withdrawn by BSI on 30 March 2028. That means there is a period of coexistence between 2023 and 2028 during which both first and second generation Eurocodes are available.
Until 30 March 2028, the first generation documents should be considered as the applicable standards for buildings and civil engineering works constructed in the UK unless otherwise specified by the relevant authority or in the specification for a particular project. While the use of provisions in second generation Eurocodes in conjunction with first generation Eurocodes is not precluded, it should be undertaken with care and should only be done when users are satisfied that it will not result in a lower level of reliability than the minimum level set in the first generation Eurocodes and associated UK National Annexes.
