If you cannot locate because it has been withdrawn, replaced, or renumbered (always check the BSI website for status), consider these related standards:
The primary function of is to provide a standardized method for testing the compressive strength of various masonry units, including: Clay bricks Calcium silicate units Aggregate concrete blocks Autoclaved aerated concrete (AAC) Manufactured and natural stone
: Both the upper and lower platens must be perfectly smooth. The planeness tolerance is restricted to 0.1 mm over any 100 mm span.
Before testing, units must be prepared in a specific manner to ensure uniformity.
The standard details a specific methodology to ensure consistency across testing labs:
Before buying a PDF, search the BSI's "Withdrawn Standards" page. If BS EN 7721 is listed as withdrawn without replacement, it means the technical committee decided it is no longer valid. In that case, refer to EN 1433 instead.
Compliance with is essential for several reasons: BS EN 772-1:2011+A1:2015 - BSI Knowledge
BS EN 772-1 is the foundational testing standard used across Europe and the UK to determine the compressive strength of masonry units. This includes bricks, blocks, and stones used in building construction. It is an essential document for manufacturers, testing laboratories, and structural engineers, as the results derived from this test dictate the structural grade (e.g., an "N" or "S" designation) of the masonry.
