Blast & Fire Blast and Fire Walls Blast Walls Milbury Prestressed panels are ideal as blast walls. The tongue and groove joints of the panels, enables each panel to lock into the adjacent panel. The units are speedily erected. Fire Walls Prestressed panels which can be either vertical or horizontal within columns are ideal as fire walls, with fire ratings of: 80mm thick - 30 minutes 120mm thick - 1 hour 160mm thick - 2 hours 200mm thick - 4 hours | 
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