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Bomb Blast Curtains & Anti-Shatter Film
Since 1982 We have been supplying Bomb Blast curtains and Bomb Blast curtain cleaning services to both public sector and private sector clients in London and across the world
How Bomb Blast Net Curtains works
The
bomb blast net curtain is designed to billow and contain the splinters of shattered glass,
the fabric ‘spinnakers' out and catches the flying glass, depositing
them safely to the trough and preventing them from flying lethally
around the room.
Specifications
Bomb Blast Curtains (BBC) are normally of 90 or 100 denier warp knitted polyester terylene curtain material with a bursting strength of 500kN/m. The bomb blast curtains are made twice the width and one and a half times the length of the window.
Bomb
Blast Curtains should cover the width of the window without a break and
where possible, the bomb blast curtain should hang freely below the sill. Where
this is not possible, the excess length of curtain should be folded concertina
fashion and placed in shallow (6 inches) troughs at sill level.
The bottom hem/tube of the bomb blast curtain incorporates weights at a rate of 400 grammes per metre.
Bomb blast net curtains should be installed 50 to 100mm from the glass. This closeness is
preferred, if the curtains are further away, detached shards of glass
may have the opportunity to twist and cut through the net and blast
waves passing round the glass may cause the bomb blast net curtains to billow away
ahead of the glass resulting in it not being effectively caught.
However,since filmed glass loses velocity quite rapidly after the first few
hundred millimetres, it is acceptable for the Bomb Blast Curtains to be
positioned further back if necessary.
Bomb Blast Curtains should not be used without Anti-Shatter Film (ASF) being applied to the windows.
BBNC is essential when windows are fitted into wooden frames to prevent large ‘splinters’ detaching.
Bomb Blast Anti-Shatter Film
The
use of polyester film 175 microns thick (including adhesive layers of
multi-ply) or film with equivalent properties would be used. 100 micron
film for panes over 6 square metres area, or over 8mm thick or for
ground floor windows of over 3 square metres would be recommended. If BBC are not in use 300micron filming would be used.
Anti-Shatter Film cannot be applied to the patterned side of frosted, figured or reeded glass.
With
double glazed windows consisting of two separate frames, in which the
inner frame can be opened independently of the other, treat both panes.
If the inner pane cannot be opened independently, or a "sealed unit" is
fitted, applying film to the inner panel is sufficient. Sometimes inner
frames are only lightly fitted; if so, they should be fully secured.
Modern
buildings make much greater use of glass than older buildings, which
means that most bomb casualties nowadays are caused by flying glass.
