Document Status
Current
Supplement
British Standards Extra Supplement
Series
BS
Abstract
Details requirements for: Class 1 units for external use, and class 2 units for internal use, in concrete, clay, copper, aluminium, steel, thermoplastics and plaster (internal only). Also gives overall dimensions, shape of apertures, unobstructed air space, wall hold, screening, testing of plaster units, impact test for thermoplastics airbricks.
History
Supersedes BS 493:1995.
Amendment A1 dated 30 September 2010 - See foreword.
ISBN
9780580727955
Subjects
Publisher History
With over 100 years of experience the British Standards Institute is recognised as the UK’s National standards body. Their committees work with the manufacturing and service industries, government, businesses and consumers to facilitate the production of British, European and International standards.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
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