The standard covers several key aspects:
BS EN 772-1 is the British Standard adoption of the European Norm titled “Methods of testing masonry units – Part 1: Determination of compressive strength.”
Simply put, this is the definitive document that outlines how to test bricks, blocks, and other masonry units to see how much weight they can bear before they fail. It covers various types of masonry units, including: bs en 7721 pdf
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Once you have the legitimate document, you will discover detailed specifications across several sections. Here is a summary of what the standard covers: The standard covers several key aspects: BS EN
| Section | What It Specifies | | --- | --- | | Scope | Defines which drainage channels and slot top surfaces are covered (e.g., for pedestrian and vehicular areas). | | Normative References | Lists other standards (e.g., EN 124, ISO 9001) that must be used alongside BS EN 7721. | | Load Classes | Class 15 (15 kN) to Class 90 (90 kN) – matching typical EN 124 categories. | | Design Requirements | Minimum slot gap width, maximum slot length, and requirements for heel-proof designs. | | Testing Methods | How to perform a load test (using a steel plate and hydraulic press) and corrosion test (240-hour salt spray minimum). | | Marking | All products must be permanently marked with load class, manufacturer logo, and standard number. | | Declaration of Performance (DoP) | Mandatory under CPR – the PDF includes templates for manufacturers. |
Masonry units cannot simply be pulled off the pallet and crushed. The standard specifies how the units must be prepared. This usually involves drying the units in an oven until they reach a constant mass, ensuring that moisture does not skew the results. Here is a summary of what the standard
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