BS 6073-2:2008 pdf free.Precast Concrete Masonry Units – Part2: Guide For Specifying Precast Concrete Masonry Units.
This British Standard gives guidance for specifying precast concrete masonry units conforming to BS EN 771-3 and BS EN 771-4.
2 Normative references
BS 5628-3: 2005, Code of practice for the use of masonry – Part 3: Materials and components, design and workmanship.
BS EN 771-3: 2003+A1: 2006, Specification for masonry units Part 3: Aggregate concrete masonry units (dense and lightweight aggregates).
4 General
When specifying masonry units, the basic characteristics listed in items a)to e) of both BS EN 771-3: 2003+A1, 6.1, and
BS EN 771-4: 2003-+A1.6.1 should be included. Where relevant additional characteristics from those listed should also be specified.
NOTE: BS EN771-3:2003+A1,6.1, and BS EN771-4:2003+A1,6.1, specify requirements for the description and designation on masonr units.
5.2 Work size dimensions
The work size of masonry units should be specified in terms of length width (thickness )and height, e.g. 440 mm x 100 mm x 215 mm
NOTE Previous UK practice called for work size to be specified in terms of length, height and thickness.
Table I and Table 2 show the work sizes of aggregate concrete masonry units commonly supplied in the UK. Tables 3 and 4 show the work sizes of aircrete masonry units commonly supplied in the UK.
NOTE 2 To obtain the coordinating size of a masonry unit, add the
nominal joint width, which is normally 10 mm, to the length and height of the umit.
NOTE: 3 Other widths might be available and in use. No single
manufacturer necessarily produces the complete range of face sizes and widths given in Table to Table 4.BS 6073-2 pdf download.