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SEC. 91.6712.  METAL ACCORDION-GRATE OR GRILLE-TYPE DOORS.
   (Title and Section Amended by Ord. No. 171,175, Eff. 7/25/96.)
 
   Metal accordion-grate or grille-type doors shall be equipped with metal guides at the top and bottom and cylinder locks or padlocks having minimum 9/32-inch hardened steel shackles with hardened steel hasps, bolted in place.  Cylinder guards shall be installed on all mortise or rim-type cylinder locks whenever the cylinder projects beyond the face of the door or is otherwise accessible to gripping tools.