The conversion of Float Glass to Toughened Safety Glass increases the strength of the glass up to five times. It also converts Normal Glass into Safety Glass as, when broken, it disintegrates into small, relatively blunt pieces, thus minimizing the risk of lacerations and other injuries. Tempershield® conforms to the following local and international safety standards:

• SANS 1263 Part1
• ANSIZ97 (American)
• BS 6206 (British)
• AS 2208 (Australian)

Applications

Due to the unique qualities of toughened safety glass, it may be used in applications where float or laminated glass cannot, or should not be used i.e.

• Suspended assemblies
• Unframed entrance doors
• Unframed balustrades
• Frameless shower doors
• Applications where thermal breakage from solar radiation is a major concern.

Design parameters and tolerances

Out of Square

Up to 2000mm longest dimension diagonal difference - 6mm. Above 2000mm longest dimension diagonal difference to be increased by 1mm for every 1000mm or part thereof, in addition to the first 2000mm.

Manufacturing limits for blowing (departure from flatness)

We have mentioned that, as a result of the toughening procces, perfectly flat glass cannot be produced. The blowing limits are dependent upon thickness, aspect ratio and size, among other factors. the folowing table details the required manufacturing limits.

 

Departure from flatness	Tolerences (mm)
On thickness, nominal 4,5 and 6mm	1mm per 200mm
On thickness, nominal 10mm	1mm per 300mm
On thickness, nominal 12mm and over	1mm per 300mm

Dimensions	Tolerances(mm)
Dimensions up to and including 500mm	+ 0 - 2
Dimensions of 501mm to 1000mm inclusive	+ 0 - 2,5
Dimensions of 1001mm to 1500mm inclusive	+ 0 - 3,0
Dimentions exceeding 1500mm	+ 0 - 5,0