Fire resistant glazing system

A glazing system comprising in combination, a pane, and extending along each side edge of the pane a glazing strip and a pair of hardwood strips, the glazing strips including an extrusion of U-shape cross-section to define a channel for receiving a marginal edge portion of the pane to be mounted, the extrusion being hollow to define a U-shaped void in which is housed intumescent material, the intumescent material being in the form of a U-shaped strip which partially fills the void to define a cavity between the intumescent strip and the internal side walls of the extrusion, the glazing strip being mounted on the pane with the side edge received in the channel defined by the extrusion, and the hardwood strips being located on opposite sides of the extrusion to sandwich the extrusion therebetween, the hardwood strips being secured to the surround of an aperture into which the pane is to be mounted.