Which type of glass is considered noncombustible but not fire resistive?

Ordinary window glass is considered noncombustible because it does not support combustion—it will not catch fire or burn. However, it is not classified as fire resistive. Fire-resistive materials are designed to withstand high temperatures and prevent the spread of fire for a specific period. Ordinary window glass can break under high heat conditions and does not provide any significant barrier to fire.

Wired glass, while it maintains its structural integrity at higher temperatures due to the wire mesh embedded within it, is still not recognized as fully fire-resistive in the same way as other specialized fire-rated materials. Laminated glass involves a polyvinyl butyral (PVB) interlayer, which may offer some benefits such as impact resistance, but it does not necessarily provide fire resistance. Tempered glass is designed to break into small, less harmful pieces and can withstand higher thermal stress than ordinary glass, but it also fails to meet fire-resistive criteria.