Manifestation or Marking of Glass ~ another aspect of the critical
location concept which frequently occurs with contemporary
glazed features in a building. Commercial premises such as open
plan offices, shops and showrooms often incorporate large walled
areas of uninterrupted glass to promote visual depth, whilst
dividing space or forming part of the exterior envelope. To prevent
collision, glazed doors and walls must have prominent framing or
intermediate transoms and mullions. An alternative is to position
obvious markings at 1000 and 1500 mm above floor level. Glass
doors could have large pull/push handles and/or IN and OUT signs
in bold lettering. Other areas may be adorned with company logos,
stripes, geometric shape, etc.Critical Locations ~ The Building Regulations, Approved Document
† N, determines positions where potential personal impact and
injury with glazed doors and windows are most critical. In these
situations the glazing specification must incorporate a degree of
safety such that any breakage would be relatively harmless.
Additional measures in British Standard 6206 complement the
Building Regulations and provide test requirements and
specifications for impact performance for different classes of
glazing material. See also BS 6262.Refs. Building Regulations, A.D. N1: Protection against impact.
A.D. N2: Manifestation of glazing.
BS 6206: Specification for impact performance requirements for
flat safety glass and safety plastics for use in buildings.
BS 6262 series: Glazing for buildings. Codes of practice.Glazing---Manifestation