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BSI - BS 493

Specification for Airbricks and Gratings for Wall Ventilation

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Organization: BSI
Publication Date: 14 December 1970
Status: inactive
Page Count: 20
ICS Code (Iron and steel products in general): 77.140.01
scope:

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, unobstructed air space, wall hold, screening, testing of plaster units. Illustrations of typical examples.

Document History

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;...
BS 493
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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