Offset Insulating Units - Viracon
Offset Insulating Units - Viracon
Offset Insulating Units - Viracon
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VIRACON<br />
TS-IG-065-UNV<br />
08/12/2009 Rev. 09<br />
<strong>Offset</strong> <strong>Insulating</strong> <strong>Units</strong> Page 1 of 3<br />
In an effort to clarify <strong>Viracon</strong>’s position regarding insulating units that have one lite of glass larger<br />
than the other, please refer to the illustration below. This is our normal fill – photo 1 [insulating<br />
robots fill almost like a 90 degree fill except for the corners]:<br />
PHOTO 1 – NORMAL FILL<br />
<strong>Viracon</strong> will supply units that have two vertical dimensions larger than the interior lite of glass. In some<br />
instances, the interior lite of glass may be longer than the exterior lite of glass. Either situation is<br />
acceptable providing the two vertical dimensions are the only two sides offset.<br />
<strong>Viracon</strong> will supply insulating units with four edges offset, only when approved by manufacturing.<br />
Technical Services must determine the sightline required for all 4-sided offsets; because of the shear<br />
load on secondary sealant from the outboard glass ply dead load.<br />
The maximum offset should not exceed 3/4” (19 mm). If offset exceeds 3/4” (19 mm) there is no<br />
warranty on the unit.<br />
“The offset lite of glass in an insulating unit must be heat-treated. In some cases, both lites of glass must be heattreated”.<br />
If a 90° fill were required -photo 2, it would be the exception and must be specified clearly on the order.<br />
(Replaced: TSM87-001)
VIRACON<br />
TS-IG-065-UNV<br />
08/12/2009 Rev. 09<br />
<strong>Offset</strong> <strong>Insulating</strong> <strong>Units</strong> Page 2 of 3<br />
Photo 2 – 90 0 FILL<br />
Buttered Fill – photo 3 - Uniform silicone layer applied to the end of offset.<br />
Photo 3 – Buttered Fill<br />
<strong>Viracon</strong> no longer will offer a 45-degree fill; use buttered fill as alternate. A Special Work Request is<br />
required for all non-standard fills.<br />
Check with insulating glass manufacturing for maximum insulating glass offset capabilities.<br />
Edge Deletion:<br />
(Replaced: TSM87-001)
VIRACON<br />
TS-IG-065-UNV<br />
08/12/2009 Rev. 09<br />
<strong>Offset</strong> <strong>Insulating</strong> <strong>Units</strong> Page 3 of 3<br />
Where edge deletion (photo 4) of a coating is required on an offset unit, the edge deletion will be continuous from<br />
the offset glass edge to the airspacer with 95% of the coating removed.<br />
Photo 4 – Edge Deletion<br />
Note: Inside Sales should ask customer what type of fill is needed for the application.<br />
(Replaced: TSM87-001)
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