The idea around creating a codified glass makeup allows the representation of real life glass description to be transfered electronically in a known and predictable format.

The structure of the code is very similar to the structure of the glass makeup it represents.

A glass makeup can be a lite of glass, a laminated lite of glass that bonds multiple glass lites with and interlayer, or a sealed unit that is made up of glass lites, or laminated glass lites separated by a cavity.

The nomenclature follows that same methodology. Each component is defined and assembled together in a code.

To define a glass lite we can specify the following traits:

• Thickness: The nominal thickness of the glass in millimeters
• Type: The type of glass as defined in ASTM C 1048. AN(annealed), HS(heat-strengthened),FT(fully-tempered), and CS(chemically- strengthened)
• Material: The type of glass or plastic used.
• Front and Back surface descriptors: these codes before and after each glazing information indicate if the surface has any additional properties.

Example:6FT{LI} is 6mm Low-Iron fully tempered

To define a laminated lite. We list the glass lites separated by commas, then follow it with the interlayer codes. Interlayers have two properties:

• Thickness: the thickness in millimeters up to two decimal places
• Material: the interlayer material code

Example:(glass),(glass)-0.76b is two lites of glass with 0.76mm PVB

Similar to laminated glass we combine two lites of glass either monolithic or laminated lites with a cavity code. The two properties for the cavity are:

• Thickness: The gap between the two lites. Usually denoted by the spacer thickness
• Gas: The gas code. if left blank air is assumed.

Example:(laminated glass)[12.7Ar](glass)is a laminated outboard lite 12.7mm argon cavity and a monolithic inboird lite.

For a full list of supported codes and properties the official documentation can be found free at the NGA Store.

Official documentation