Search results with tag "Bs en 771"

BS EN 771-1 BS 3921 British Standard Specification for ...

BS EN 771-1 European Standard Specification for clay masonry units compared to BS 3921 British Standard Specification for Clay Bricks ON BS3921 - Durability FL Frost resistant (F) Low (L) FN Frost resistant (F) Normal (N) ML Moderately frost resistant (M) Low (L)

  Standards, British, British standards, Bs en 771