Official versions of this standard are available for purchase and download through several recognized providers: BS EN 772-1:2011+A1:2015 - BSI Knowledge
: Faces of the test specimen must be flat (within 0.1 mm) and parallel. If they do not meet these criteria, they must be prepared through grinding or capping with a specific cement/sand mortar.
is the British Standard adoption of the European Norm titled “Methods of testing masonry units – Part 1: Determination of compressive strength.” bs en 7721 pdf
A: European Standards, including BS EN 772-1, are reviewed and updated regularly to reflect changes in technology, market requirements, and regulatory needs. The frequency of updates depends on the standard's relevance and the need for revision.
When searching for "BS EN 7721 PDF", users are typically looking for one of two documents: Official versions of this standard are available for
To get an accurate reading, the load must be applied evenly. Since bricks often have uneven surfaces, the standard details methods for "capping"—applying a layer of gypsum plaster or mortar to create a flat surface—or grinding the faces flat.
It is important to note that is a copyrighted document. There are no legitimate free PDF sources for the full, current standard. Accessing the standard requires purchasing it from an authorized distributor. Here are your options: The frequency of updates depends on the standard's
| Standard Designation | Title | Core Focus | | :--- | :--- | :--- | | | Methods of test for masonry units - Determination of compressive strength | The most frequently referenced part, specifying the procedure to determine the compressive strength (load-bearing capacity) of a masonry unit. | | BS EN 772-2:1998 | Methods of test for masonry units - Determination of percentage area of voids in masonry units (by paper indentation) | Outlines a method for calculating the percentage of voids within a masonry unit, which affects its weight, thermal properties, and strength. | | BS EN 772-7:1998 | Methods of test for masonry units - Determination of water absorption of clay masonry units by boiling in water | Specifies a test to measure how much water a clay masonry unit absorbs after being boiled, a key indicator of its durability in wet conditions. | | BS EN 772-9:1998 | Methods of test for masonry units - Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling | Provides a test method using sand to accurately determine the volume of voids and the net volume of the unit material itself. | | BS EN 772-11:2011 | Methods of test for masonry units - Determination of water absorption of aggregate concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units | Describes tests for capillary water absorption (wicking) for various unit types and the initial rate of absorption (suction) for clay units. | | BS EN 772-16:2011 | Methods of test for masonry units - Determination of dimensions | Defines a method for determining the overall dimensions, thickness, and other geometric properties of masonry units. | | BS EN 772-20:2000 | Methods of test for masonry units - Determination of flatness of faces of masonry units | Specifies a test to measure the flatness of the bed faces of a masonry unit, which is crucial for a uniform mortar bed. | | BS EN 772-21:2011 | Methods of test for masonry units - Determination of water absorption of clay and calcium silicate masonry units by cold water absorption | Describes a method for determining water absorption by immersing units in cold water, a different approach than the boiling method in Part 7. | | BS EN 772-22:2018 | Methods of test for masonry units - Determination of freeze/thaw resistance of clay masonry units | Specifies a method to determine a clay unit's resistance to freeze-thaw cycles, categorizing them as F1 or F2 based on their durability. |
The compression machine must meet strict accuracy and repeatability limits, typically with a maximum permissible repeatability of 2.0% of the indicated force.
Masonry unit compressive strength (ASTM/EN equivalent: EN 772-1) Determine the load-carrying capacity of units Status