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The Uses
Applying security grade
window film to the inside of glass to improve post-break behaviour is
not new. For many years, companies have offered to apply window
films, of security grade quality to prevent annealed float glass
shattering into individual fragments and causing harm to persons or
damage to equipment. |
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Non-Safety Glass producing lethal cutting
shards on breaking.
Window film is normally
applied in what is known as a "daylight" installation.
This is where the film applied is slightly smaller than the area of
visible glass resulting in an area of untreated glass around the
perimeter of the pane (daylight space).
Under the impact the force
applied to the window is concentrated at the edge where the
"daylight" gap exists. The common result is that the
glass disintegrates at their weak point and the entire panel of filmed
glass could fall out of the frame.

Glass with film applied is
blown out of frame. Fragment hazard greatly reduced. However
risk of body impact and loss of controlled environment.
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One method of
preventing the filmed glass from leaving the frame is to apply an edge
batten which traps the film onto the frame.
The FrameGARD profile system extends the principle
of edge battening by incorporating a specific movement zone (Patent
applies) which allows the film to move under applied load without
putting excessive force onto the fixings and frame.
The movement zone
(indicated on Steps 2 & 3 of Example B) absorbs a high degree of the
impact energy before loads are distributed to the FrameGARD profile and
window frame.
Use of the FrameGARD film restraint system allows significant
improvement in terms of blast pressure and body impact loads compared
with traditional daylight film applications.

Filmed glass with FrameGARD - after
blast. The glass has held in place by the combination of applied
film and FrameGARD Anchoring System.
FrameGARD
also achieves a higher level of burglar resistance to
"daylight" film applications.
In "daylight" applications it is possible to attack the
untreated edge of the window, levering the glass out of the frame. FrameGARD
can be used in areas
of building for both safety and security reasons, for Shop Fronts,
Schools, Offices and Industrial Sites. |