: Establishes permissible deviations in dimensions and positions to ensure the structural integrity and aesthetic quality of the build. Implementation and Compliance
is the European standard that specifies the requirements for the execution of concrete structures to ensure they meet the design assumptions and durability requirements.
: Includes in-situ works and the assembly of precast concrete elements. bs en 13670
Class 1 is for standard structures with normal risk, while Class 2 is for structures with higher risk consequences of failure. The designer must specify the Execution Class on the drawings.
is the definitive British and European standard governing the execution of concrete structures . It provides a comprehensive framework of technical requirements to ensure that concrete works—whether cast in-situ or using prefabricated elements—meet the safety and serviceability standards intended by the designer. Core Purpose and Scope Class 1 is for standard structures with normal
This guide is for informational purposes. Always refer to the full standard text and consult a qualified structural engineer for project-specific application.
Prior to the full adoption of Eurocodes, the UK used standards like BS 8110 and the National Structural Concrete Specification (NSCS). BS EN 13670 replaced the workmanship sections of these older standards. bs en 13670
Important: BS EN 13670 is cited in the UK Building Regulations and is the reference for execution under the Eurocode system.
This is arguably the most critical section for site operatives.
Once the "skeleton" of steel is ready, BS EN 13670 dictates the rules for the main event: . It ensures that the liquid stone is placed and compacted correctly to avoid "blowholes" or weak spots.
The designer specifies the execution class. The contractor must comply with it.