Curved tempered Glass

Curved tempered glass or curved heat strengthened glass is made of annealed glass heated to its softening point, then curved to shape, and finally cooled down rapidly by special facility. We adopt advanced technology of synchronous roller shaping process, which allow to easily and flexibly adjust model, producing excellent appearance quality and good optical performance


In another first we combines the strength of toughening with the latest in curved safety glass technology to offer architects, specifiers and interior designers a range of innovative and exciting design options.The continuous manufacturing process involves heating, then curving the glass to the required shape before finally toughening. By employing movable platens in the quenching process, the need for expensive press moulds has been eliminated. This technology allows each shape to be precisely moulded to customer specifications providing cost effective building solutions.


To assist designers and clients when seeking quotations or placing orders the following terminology should be used:
Height: The straight edge length of the glass.
Depth: The distance between two parallel lines which enclose the curved glass.
Radius: The distance from the centre of the circle to the circumference of the circle
Degree: The angle of a segment in a circle expressed in degrees.
Tangent: A straight line extending from the arc of the curve.
Chord: The straight distance between the edges of the curve.
Girth: The distance around the surface of the curve.

Dimensional Specification

It should be noted that the maximum bending angle is 90˚, therefore a full circle (360˚) can only be achieved using four pieces of glass

Curved glass:

Thickness of glass: 3mm-25mm
Max size: 2800*6400                Min size: 50*50mm
Radius: 200mm-2800mm        Max Arch Height: 1200mm

Tempered curved glass:

(1). Curved Tempered Glass: 5-19mm (the first line) . Max Size: 2800*2650 Min Size: 600*200   Radius: 5-8mm R>=1300    10-12mm R>=1300  15-19mm R>=1300
(2). Curved Tempered Glass: 5-19mm (the second line)  Max Size: 2400*4000 Min Size: 600*400  Radius: 5-8mm R>=1100  10-12mm R>=1100  15-19mm R>=1300

Dimensional Specification 2

Curved toughened glass can only be curved in one plane (dimension).

Available Curves
It should be noted that the maximum bending angle is 90˚, therefore a full circle (360˚) can only be achieved using four pieces of glass.

Maximum Sizes
As height increases, the glass becomes more difficult to curve and therefore the minimum radius must be increased. Similarly as the glass weight and thickness increases, the maximum height must be decreased and the minimum radius increased

Providing accurate dimensions for the purpose of manufacturing curved toughened is crucial to the whole process. In particular, the radius and girth dimension must be clearly stated as being measured from either:
a) the inside edge of the glass,
b) the centre of the glass。
c) the outside of the glass.

The preferred dimension is the radius from the inside edge of the glass, particularly for cylindrical shapes.
Where the chord and depth dimensions can be supplied, a computer program will be used to print out all necessary dimensions for clients checking and sign off.
Templates would be preferred for cylindrical shapes but are a must for cylindrical shapes with flats. All templates must be of a hard material such as plywood and remember the minimum possible radii as previously listed in Table。

we curved toughened safety glass has many and varied applications including:

Shopfronts and Internal Partitions
Balconies, Balustrades and Pool Fencing
Revolving Doors
Elevators and Lifts
Skylights and Covered Walkways
Bay Windows
Display Cases, Deli bends and Food Cabinets
Glass Furniture

Maximum Sizes

It is also possible to incorporate Colourlite onto the surface of curved toughened glass panels.

Acceptance Criteria

Curved toughened glass can only be curved in one plane (dimension).

The manufacturing limitations are as follows:

Maximum girth or curved dimension

2140mm (5mm-12mm)

Maximum height

3000mm (6mm/8mm)

3660mm (10mm/12mm)

For other thicknesses see Table

Minimum height 400mm

Edgework: As per flat toughened glass

Cut-outs: As per flat toughened glass

Holes / Spacings: As per flat toughened glass

Curve: To fit within ± 3mm of the specified shape or 6mm more than the glass thickness.
Local Warpage: At the curved edge: 1.5mm for glass up to 6mm thick and 3mm for glass over 6mm.

The appropriate standard for Architectural curved toughened glass covering the thickness range of 5mm – 12mm is AS/NZS 2208. For automotive glasses 5mm – 12mm thick, the appropriate standard is AS 2080.
As 3mm and 4mm are only available in heat strengthened and not fully toughened, such panels are not covered by the above standards as heat strengthened is not classified as a Grade A safety material.