Where the framing system is to be hardwood sections, the beads shall be 25mm wide by 15mm high, chamfered by 15o and fixed using either 38mm long No 8 wood screws or steel pins 32mm long.
The timber for the screen and beads shall have a minimum density of 600kg/m3 with a minimum section size of 80mm by 25mm. Ash and beech are not acceptable.
The fixings shall be at a maximum of 150mm centres.
The glass shall be glazed into the screen using FireGlaze compound 15mm by 2mm intumescent material, between the glass and the beads. Hardwood or non-combustible material setting blocks shall be used to achieve the required edge cover.
This certificate of approval relates to apertures of the sizes and the glasses shown in the table below when used in conjunction with FireGlaze compound glazing method.
