BSI - BS 493
Specification for Airbricks and gratings for wall ventilation
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| Organization: | BSI |
| Publication Date: | 15 April 1995 |
| Status: | active |
| Page Count: | 12 |
| ICS Code (Walls. Partitions. Façades): | 91.060.10 |
scope:
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.
Document History
BS 493
April 15, 1995
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,...
April 15, 1995
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;...
December 14, 1970
Specification for Airbricks and Gratings for Wall Ventilation
Class 1 units for external use, and class 2 units for internal use in concrete, clay, cast iron, copper, aluminium steel, plastics and plaster (internal only). Overall dimensions, shape of apertures,...
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