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Door openings shall be reinforced in accordance with BS EN 40-3-1. Flush fitting doors, which shall be sealed to minimum IP44, shall be provided with two stainless steel triangular-headed locks. The locking mechanism shall be lubricated with grease immediately following installation and if necessary prior to the end of the defects correction period. The earthing terminal provided for aluminium columns and their doors shall comprise a stainless steel bolt, complete with nut and two washers. The copper earthing wire shall be installed between the two washers to ensure that the copper cable does not come in contact with the aluminium
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