are generally used in curtain wall systems, either behind
a metal panel or on the back of spandrel glass. They provide
excellent insulation, fire safety and sound absorption capabilities.
Yarl Metal produces backpans of various shapes and sizes;
the most common ones are rectangular bases with straight clips.
Special adapters are formed at the end of the clip to suit
the installation and five different types are illustrated
is utilized for specific needs and requirements. For more
information, please contact the sales department
variables are taken into account in determining the profile
of the backpans:
- The sectional
depths of the curtain wall and window influence the pan
- Most common insulation has "R" value 4/ inch
Thickness of insulation will vary depending on the R factor,
type of insulation and pan depth.
- The profile of the back pan depends on how the glass is
- The back pan material is selected based on the finish
- Width and height of the pan are in most cases ¼
inches less DLO (Day Light Opening)
Pan Size may
be any size virtually in level with the vertical wall. To
accommodate large sizes, smaller pans are joined together
and intermittently reinforced using vertical legs There are
also several types of shape for the base of the back pan such
as trapezoidal, rectangular, triangular, semicircle and many
others. These custom-made insulated pans can be made to fit
into any space. 45-degree angle pans to accommodate building
corners, and corresponding clips with a slight angle are made
to act as a drip to keep moisture from entering the building.
The angle on
the clip is formed to contain caulking to seal the joint between
the pan and the curtainwall. All different profiles shown
of the sketch are based on design needs.
used is 20 gauge and seldom 22 gauge galvanized steel. However,
they can be made of any gauge steel depending upon the requirements
of the client.
The type of
insulation used in the back pan is critical to the effectiveness
of the pan. The effectiveness of the insulation is measured
by the R-Value, which expresses the amount of heat that is
kept within the system. A higher R-Value allows less heat
loss through the layer. The most commonly used insulation
is Roxul RHF 40, which has an R-Value of 4.2, but other options
The above items
refer to the different variables that are taken into consideration
in designing backpans and they can be adapted in various ways
to produce customized back pans to fit every space and requirement.