J.E. Berkowitz has three state-of-the-art horizontal tempering ovens that produce the highest quality of heat strengthened and fully tempered glass. Heat-Treated glass is:
Roller-wave distortion for 1/4″ glass – JEBs internal target is to maintain a limit of .003 peak to valley, excluding the lead and trail edges (10”) with an allowable .008”. Industry guideline for 1/4″ heat-treated glass suggest a tolerance of not to exceed .006” peak to valley, excluding the lead and trail edges (10”) with an allowable .010”.
Bow and Warp for 1/4″ glass can be targeted not to exceed 1/32″ per lineal foot.
JEB recommends the use of full size mockups for visual and approval purposes.
Heat-strengthened glass is flat glass that has been heat treated to have a surface compression between 3,500 and 7,500 psi (24 to 52 MPa) which is twice the surface compression of annealed glass and meets the requirements of ASTM C 1048. It is intended for general glazing, where additional strength is desired to withstand wind loads and thermal stresses. However, heat-strengthened glass is not a safety glazing material.
Fully tempered class is flat glass that has been heat-treated to have a minimum surface compression of 10,000 psi (69MPa) resulting in resistance to impact of approximately four times that of annealed glass. Fully tempered glass will meet the requirements of ANSI Z97.1 and CPSC 16 CFR 1201 and is considered a safety glazing material.
Fully Tempered Glass
Minimum Tempering Size – 4 1/2″ x 14″
Maximum Tempering Size – 96″ x 180″
Fully Tempered Glass (Based on glass thickness)
|5/32||40” x 76”|
|1/4″ Clear & Tint||96″ x 180″|
|3/8″ Clear & Tint||96″ x 180″|
|1/2″ Clear & Tint||96″ x 180″|
|5/8” Clear||80” x 160”|
|3/4″ Clear||80” x 160”|
|3/16″ Low-e||48″ X 96″|
|1/4″ Low-e||84″ x 142″|
|5/16” Low-e||84” x 142|
*Consult JEB for applicable maximum glass sizes