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Architectural Glass: Safety & Burglary
Performance
Laminated safety glass is tested using a taped, leather bag filled with lead shot weighing 100 lbs. A standard size piece of glass is clamped vertically in a frame. The impactor is supported from a wire cable so that it will impact the glass in the center. The ball is lifted to the required height and allowed to swing freely into the glass. Numerous cracks and fissures may occur, but no shearing or opening, through which a 3-inch diameter sphere may pass freely, will develop.