Specification for airbricks and gratings for wall ventilation.
STANDARD published on 30.9.2010
Designation standards: BS 493:1995+A1:2010
Publication date standards: 30.9.2010
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: British technical standard
Category: Technical standards BS
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. Status: Confirmed