Safe Room Resources Display Panels Doors and Hardware Panel - Steel doors with exterior skins of 14-gauge steel welded to the interior steel frame the full height of the door - Continuous 14-gauge steel channels at the hinge and lock rails - Top and bottom of door should have16-gauge channels - Minimum hardware reinforcement of 12-gauge steel - Door fill of polystyrene infill or honeycomb core - Alternative Door: 18- or 20-gauge skin door, meeting the above internal frame construction, with a 14- gauge or heavier - Three heavyweight hinges - Three cylindrical dead bolts (with solid 1 /2-inch-thick steel throw bolts with 1-inch throw into door jamb) with one latch/lock cylindrical or two cylindrical dead bolts, each at level of hinge, and a mortised latch with a throw dead bolt locking function Note: 16-gauge door frames should be anchored as shown in FEMA 320. Note: Several companies manufacture metal doors that meet FEMA 320 specifications.