Glass block fire wall

A glass block fire wall comprising vertically extending horizontal runs of glass blocks, each glass block having a peripheral side wall extending between spaced vertical faces, the peripheral side wall of each glass block comprising a channel having a contoured surface, abutting channels of the glass blocks being able to form a void with the contoured surfaces thereof opposed to one another, a horizontally extending separation strip sandwiched between each run of glass blocks, each separation strip comprising a narrow member marginally narrower than the side walls of the glass blocks and being positioned generally centrally between the side walls of adjacent glass blocks, each separation strip being formed from a fibrous cement fire resistant material to inhibit the passage of fire through the wall, each separation strip having opposed contoured continuous peripheral surfaces and opposed edges, the contoured continuous peripheral surfaces of the separation strips being substantially matched to the contoured surfaces of the channels of the glass blocks, the separation strips substantially filling the voids formed by the channels of the glass blocks.