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BS PD 6446 70th Edition, June 18, 1970
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Recommendations for the Co-Ordination of Dimensions in Building. Combinations of Sizes
Includes all amendments and changes through Reaffirmation Notice , June 1, 2016
Page Count:28
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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.