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4621 Glass block walling (2)
Blockwork consisting of glass blocks, wet jointed with mortar or jointed with sealant joints, to form
wall panels, set dry in a metal or timber frame or in prepared openings
4622 Fire-rated glass block walling (2)
A fire-rated wall assembly constructed of glass blocks in an approved frame
Glass blocks
4623 Translucent plastics block walling (0)
Blockwork of translucent plastics blocks, jointed with sealant, set in a frame or in prepared openings
4624 Profiled glass walling (1)
Rectangular hollow tubes and channels of translucent glass with interlocking edges, to form external
walling or internal partitions, the edges of the wall panels set into extruded aluminium sections
secured to the building fabric
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