It applies to both in-situ concrete (cast in place) and precast concrete. The standard does not tell you how to design a building; rather, it tells you the level of quality and workmanship required to build the design correctly. It bridges the gap between the engineer’s drawings and the finished physical reality.
| Class | Typical application | Control level | |-------|--------------------|----------------| | EXC1 | Low consequence of failure (e.g., simple industrial floors, minor structures) | Normal | | EXC2 | Normal buildings, bridges, civil works | Enhanced | | EXC3 | High consequence / complex structures (e.g., nuclear, tall towers, special bridges) | Strict | bs en 13670
This standard is the bridge between a theoretical drawing and a physical structure. It covers everything from how to set up the (the "molds" for the concrete) to the exact way reinforcement bars must be positioned before the pour. The Rules of the Pour It applies to both in-situ concrete (cast in
| Pitfall | Prevention | |---------|-------------| | Ignoring EXC class | Check design brief – default to EXC2 if not specified. | | Loose cover tolerances | Use factory-made spacers, fix to rebar. | | No curing records | Assign responsibility; record temperature, method, duration. | | Late striking | Use concrete cube results or maturity sensors. | | Poor compaction | Plan vibration access; use self-compacting concrete if needed. | | Class | Typical application | Control level
This is arguably the most critical section for site operatives.
A unique feature introduced by BS EN 13670 is the . The standard recognizes that a simple residential slab requires different levels of scrutiny than a nuclear power plant or a long-span bridge.
The standard also manages the crucial . For instance, it warns that using surface-applied curing compounds can be a double-edged sword; they help retain moisture for strength but can ruin the bond if you need to stick waterproofing materials to the deck later. Measuring Success