Heat-strengthened glass is typically specified when additional strength is needed to resist wind pressure/load, thermal stress or both caused by certain Tinted or Coated Glass, and the additional strength or safety break pattern of fully tempered glass is not required. Another advantage of heat-strengthened glass is that when broken, the glass fragments are more similar in size and shape to annealed glass fragments and thus tend to stay in the opening longer than fully tempered glass particles. Although heat-strengthened glass is NOT a safety glazing by building code, this breakage pattern prevents the glass from falling and injuring someone.Then It is widely used in laminated glass for additional strength, such as in overhead and Slopped Glazing.

                                      
            Heat Strengthened Glass                                             Tempered Glass