British Standards Document
BS EN 771-6
Specification for masonry units. Natural stone masonry units

https://doi.org/10.3403/30203907U

BS EN 771-6 is maintained by B/519/1. The current release of this standard is:

BS EN 771-6:2011+A1:2015 Specification for masonry units. Natural stone masonry units

https://doi.org/10.3403/30203907 (published 31/10/2011)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS EN 771-6:2011 [current until 31/03/2016]
BS EN 771-6:2005 [current until 31/10/2011]
BS EN 771-6:2001 [current until 11/01/2006]