Mainly we've got two different types of safety glass:
a) laminated glass
b) toughened glass

No one type of glazing is suitable for every application. Many materials are available that serve a variety of purposes. Different glazing types can also be used in combination to achieve maximum results. When choosing glass, consideration should be given to window size and placement, orientation, climate, privacy and security.

a) Laminated Glass:

Laminated glass consists of a tough protective interlayer made of polyvinyl butyral (PVB) bonded together between two panes of glass under heat and pressure.
Once sealed together the glass "sandwich" behaves as a single unit and looks like normal glass. Similar to glass in car windshields, laminated glass may crack upon impact, but the glass fragments tend to adhere to the protective layer rather than falling free and potentially causing injury. The shear damping performance of the PVB makes laminated glass an effective sound control product. Laminated glass is commonly used in airports, museums, sound studios and schools to keep away unwanted noise from airplanes, heavy machinery and traffic, to name a few. Laminated glass offers greater protection for people and property over other glass products. The standard two-ply construction provides resistance to penetration when subjected to attempted force entry. Laminated glass blocks 99% of UV rays from entering your home preventing fading to furnishings and carpets. In multi-ply configurations, laminated glass can even resist bullets, heavy objects, or small explosions. In most cases, it takes many blows, all in the same spot, to penetrate the glass. Annealed, heat strengthened or tempered glass can be used to produce laminated glass. Laminated glass is not a double glazing, even it is made out of two glasses. Double glazing is a unit with a space in between the two glasses.

b) Toughened Glass

Toughened glass offers added strength and significantly higher compressive stress than annealed glass of the same thickness. This results in increased resistance to impact breakage, improved ability to withstand uniform loads and decreased chance of thermal stress breakage. When broken, it shatters into many small fragments which prevent major injuries.
This type of glass is required in areas at high risk of human impact such as bathrooms, glazed doors and windows closer than 500mm to the ground. The South African Building Regulation details these requirements. Please ask Axel Zimmermann for further information.