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EERE » BTO » Building America » Solution Center Home » Image Gallery » A cross-section of a vinyl-framed window showing metal reinforcement which helps support the window and prevent collapse if exposed to heat from a fire.

A cross-section of a vinyl-framed window showing metal reinforcement which helps support the window and prevent collapse if exposed to heat from a fire.

A cross-section of a vinyl-framed window showing metal reinforcement which helps support the window and prevent collapse if exposed to heat from a fire.