BS 493 PDF

Specification for airbricks and gratings for wall ventilation

BS 493 – Specification for airbricks and gratings for wall ventilation

Class 1 units for external use, and class 2 units for internal use, in concrete, clay, copper, aluminium, steel, thermoplastics and plaster (internal only). Overall dimensions, shape of apertures, unobstructed air space, wall hold, screening, testing of plaster units, impact test for thermoplastics airbricks.

Cross References:
BS 1191-1
BS 2782-3:Methods 320A to 320F:1976
BS 4027
BS 6610
BS 6750
BS EN 197-1
BS EN 197-4
BS EN 1559-1
BS EN 1559-4
BS EN 1676
BS EN 1706
BS EN 1976
BS EN 1978
BS EN 10029
BS EN 10048
BS EN 10051:1991+A1:1997
BS EN 10095
BS EN 10130
BS EN 10346
BS EN 12620:2002+A1:2008
BS EN 12878
BS EN 13279-1
BS EN ISO 877
BS 2782-5:Method 550B:1996
BS EN ISO 1461
ISO 1461:2009
BS EN ISO 9445-1
ISO 9445-1:2009
BS EN ISO 9445-2
ISO 9445-2:2009
BS 6954-1:1988
BS 6954-2:1988
BS 6954-3:1988

Incorporates the following:
Amendment, September 2010. Amends and replaces BS 493:1995