BS 6073 Part 2, Method for specifying precast concrete masonry units gives sizes and strengths in common use together with other useful information. Compliance procedures are described along with methods for checking strength and density.

The design and use of masonry products is specified in the various parts of BS 5628: Code of Practice for the use of Masonry, Parts 1,2 and 3.

BS EN 771-2, Specification for masonry units: Calcium silicate units

BS EN 771-4, Specification for masonry units: Autoclaved aerated concrete masonry units 

 BS EN 771-3, Specification for masonry units: Aggregate concrete masonry units (dense and lightweight aggregates)