The 300 Series is manufactured from heavy-duty 14 gauge 304 stainless steel and supports weights up to 600 lbs. A wide variety of configurations are available, including models with Adjusta-Screw fasteners.
Fire Rating:
• Classified in accordance with UBC standard 7-2 for positive pressure
• 20 minutes – wood doors
• 90 minutes – hollow metal and composite core wood fire doors
• 3 hours – hollow metal doors mounted singly