In fire safety, which of the following types of glass breaks into large, sharp-edged shards?

Ordinary window glass is untempered and does not have any special treatments or characteristics that alter its breaking pattern. When it breaks, it shatters into large, sharp-edged shards that can pose serious risks of injury. This property is particularly hazardous in fire situations where debris can create additional dangers for both firefighters and victims.

Laminated glass, on the other hand, is designed to hold together when shattered, as it consists of layers of glass with an interlayer that prevents it from breaking apart into sharp shards. Tempered glass is treated to withstand heat and impact, and when it does break, it shatters into small, rounded pieces rather than large, dangerous shards. Wired glass incorporates a wire mesh which also helps to hold it together in case of breakage, preventing sharp edges from forming. These characteristics of laminated, tempered, and wired glass make them safer options compared to ordinary window glass in various emergency and fire scenarios.