Basics- Hard, brittle
-The manufacturing process heats the raw materials until they are completely fused, they are then cooled quickly become rigid without fully crystallizing.
Tempered glass = toughened glass
Process
-It is made by a process of heating annealed glass to 1200 degrees F (649 degrees C) and then quickly cooling it.
-Consider a type of safety glass
-Four to five time stronger than “normal” annealed glass.
Technical information
-It is float or plate glass that has been heated and rapidly cooled, increasing its inherent strength and ductility.
-It can have some distortions from the tempering process.
-Almost all large sheets of architectural glass are tempered, thereby reducing the required thickness of the glass.
-When designing with glass, they are three types of forces to consider = Tensile forces, compressive forces and shear forces.
Limitations
-Size limitations on diameter tempered= minimum of 11 ¼ diameter, maximum 60’’ diameter, maximum thickness is ½’’,
Minimum tempered size 8*8 (non-diameter).
Usage
-Tempered glass is safer than regular types, it is ideal for use in car windows, shower and tub enclosures, doors, display cases, and tabletops.
-Large sheet architectural exterior.
-For any other application that would become dangerous in the event of a human impact.
Environmental impact
-Tempered glass can be recycled but it is difficult to re-melt compared to annealed glass.
Advantages
-Chemical and corrosion resistant.
-It is suitable for windows that are exposed to high wind pressure or extreme heat or cold.
-Resistance to impact stresses
-Strength, which effectively resists wind pressure and impact, provides safety in many applications of tempered glass.
-Tempered glass can reach up to 24,000psi for breaking stress (large light 60 sec. load) compare to annealed glass which only can reach up to 6,000 psi.
-Tempered glass breaks in a unique way. If any part of the glass fails, the entire panel shatters at once. This distinguishes it from normal glass, which might experience a small crack or localized breakage from an isolated impact.
Disadvantages
-Tempered glass cannot be cut, drilled or altered after it is manufactured.
-Tempered glass cannot be cut, drilled or altered after it is manufactured.
-It is much more expensive than annealed glass.
Company in Australia
Reference
-Materials for architectural design, by Victoria Ballard Bell with Patrick Rand
-http://ezinearticles.com/?What-Is-Tempered-Glass?&id=2794691
-Materials for architectural design, by Victoria Ballard Bell with Patrick Rand
-http://ezinearticles.com/?What-Is-Tempered-Glass?&id=2794691
No comments:
Post a Comment