BS 493:1970
Superseded
View Superseded by
Specification for airbricks and gratings for wall ventilation
Hardcopy , PDF
English
12-14-1970
04-15-1995
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Superseded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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