Glass

Here are a few notes about the types of glass used in construction.  These are from my study for the materials and methods portion of the Architects' Registration Exam.  Just a few short notes that help me remember the various types and technologies.  Please comment if you have corrections or additions.

Float Glass / Annealed Glass

• Slowly cooled on be of molten tin

Heat Strengthened

• Twice the strength of annealed
• Heated to 1100°F

Tempered

• Subject annealed glass to 1150°F, then quickly cool
• 4 times stronger than annealed
• Safety glass

Laminated Glass

• Polyvinyl Butyral Resin interlayer
• In the event of glass break, this interlayer prevents pieces from breaking completely loose and falling

Tinted or Heat Absorbing

• Reduces Solar Transmittance
• A given piece should not be half shade & half exposed. This will cause thermal stresses that could lead to breaks.

Low Iron Glass

• Reduced Iron Oxide content
• Light green cast
• Exeptional clarity

Reflective Glass

• Thin layer of metal
• Saves energy
• Reflects solar radiation

Insulating Glass

• 'IGU'
• Hermetically sealed airspace

Patterned Glass

• Pressed through rollers

Wire Glass

• Wire embedded
• 50% stronger than annealed

Spandrel Glass

• Permanent fuse of ceramic frit color

Low-Emissivity Glass

• 'Low-E'
• Selectively reflects and transmits certain wavelengths of electromagnetic spectrum.
• Transmits visible light & short wave radiation
• Reflects long wave heat radiation
• Low-E coating is applied to No.3 surface (see diagram here)

Other glass types

• Energy Efficient Glazing
• Electrochromic Glazing
• Fire Rated Glazing

Comments

[Shower Doors]

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