BS PD 6446 70th Edition, June 18, 1970
Recommendations for the Co-Ordination of Dimensions in Building. Combinations of Sizes
Includes all amendments and changes through Reaffirmation Notice , June 1, 2016
Published By:British Standards Institution (BSI)
Provides further guidance on the selection of limited ranges of co-ordinating sizes for additive building components, by an introduction to the use of combinations of numbers, or sizes.