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Often
fragment retention window film is applied directly to
glass to reduce fragmentation hazards, but it also can
be anchored to existing window frames to increase the
overall performance of the glass. Anchoring to the
frames helps keep the glass shards and the FRF within
the window opening (depending on the size of the blast)
and significantly reduces glass fragment hazards.
Mechanical Anchoring
The
Mechanical anchoring systems has been rigorously tested
to ISC/GSA Blast Security Criteria using various types
of glass and wrapped onto the existing window frame. The
film is anchored there with an aggressive transfer
adhesive. The batten is then bolted to window frame,
mechanically securing the and glass in place.
A
cosmetic cap (anodized or painted to match the frame) is
installed to cover the screws, batten and film, and a
vinyl gasket is added to provide a clean, sharp
appearance. The finished installation becomes part
of the window system and is virtually invisible to
building occupants. |
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Structural
Adhesive
With the
structural adhesive system the gaskets on the existing
window unit are removed or cut to allow adhesive to
extrude into the frame rebate (the gap between the glass
and the frame). The FRF is applied to the glass and
allowed to dry. Next, a black architectural structural
hardening adhesive is applied over the film, over the
existing window frame, and into the frame rebate. The
adhesive is strictly applied following GSA standards to
achieve the anchoring performance necessary to meet
ISC/GSA Blast Security Criteria.
Typically, GlassLock clients specify the
anchoring system and installation configuration
preferred base on their needs. All clients are
encouraged to have a qualified structural engineer with
blast experience to evaluate the existing fames,
substrata of the existing window before specifying an
anchoring system.
Every
Installation configuration is specific to the
requirements of the existing site. |
