The invention relates to transparent fireproof glazing including at least one set of tempered glass sheets between which a layer of hydrated alkaline silicate is provided, wherein the sheet exposed to fire breaks first and ensures, with the sheets having the same glass composition, that either: the stresses of the tempered sheets have different intensities, the sheet exposed first having the lowest stress; the sheets have a different thickness, the sheet exposed first having a lower thickness; the edges of the sheet exposed first are rough cut or have flattened edges, the edges of the second sheet being lapped or polished; or lower stresses and/or thicknesses are simultaneously provided and/or rough cut edges or flattened edges are provided for the first sheet exposed to the fire.