BS 493:1970
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Specification for airbricks and gratings for wall ventilation
Hardcopy , PDF
15-04-1995
English
14-12-1970
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.
| Committee |
B/519/1
|
| DevelopmentNote |
Formerly BS 493: Part 2: 1970
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| I.S. 325-2:1995 | CODE OF PRACTICE FOR USE OF MASONRY - PART 2: MASONRY CONSTRUCTION |
| BS 1035-40, 1172-74, 1861, 1954:1964 | Raw copper |
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