Architectural safety glass is specified for controlled fracture behaviour under impact, thermal stress, or wind load. The main categories—tempered, laminated, wired, and anti-theft—share a float-glass substrate but differ in fabrication method and post-breakage performance.
Tempered glass is produced by heating float glass to softening temperature, then rapidly air-quenching it or chemically strengthening it by ion exchange. The resulting surface-compression layer provides roughly 5–6 times the bending strength and about three times the impact resistance of annealed glass, and it fractures into small, relatively blunt granules. Supplied only as cut-to-size; available in clear, heat-absorbing, or curved tempered glass for façades, doors, partitions, and skylights.
Laminated glass bonds two or more glass lites under heat and pressure with a plastic interlayer. If broken, the interlayer retains fragments, reducing fall-out hazard and delivering higher impact resistance than monolithic glass. Build-ups may combine float, coated, heat-absorbing, or tempered glass with different interlayer types to target UV stability, thermal tolerance, or moisture resistance. Specified for high-rise glazing, overhead canopies, retail display cases, and shop fronts.
Wired glass embeds a pre-heated metal mesh into semi-molten glass. The reinforcement holds shards in place during breakage and can impede flame spread, making it suitable for industrial rooflights, warehouse partitions, and exterior screens where basic fire-retardant and retention properties are required.
Anti-theft glass is a multi-ply laminated composite assembled from tempered, thick, or wired glass with resin interlayers. Conductive wires and sensors embedded between plies connect to an alarm system, combining physical resistance with active intrusion detection for banks, secure storage, and high-value displays.
Testing covers appearance quality, dimensional tolerances, bow and curvature, visible light transmittance (VLT), visible light reflectance, wind-pressure resistance, heat and moisture resistance, irradiation stability, ball-drop interlayer adhesion, and shot-bag impact.