National Hardware Top Mount Box Rail

National Hardware's Top Mount Box Rail is designed for doors weighing up to 450 lbs. Manufactured from galvanized steel for durability. Includes pre-punched mounting flashing brackets welded to the rail on 2' centers for attaching to 2"x6" track board with 2-1/2" ring shank nails with neoprene washer. For exterior applications. Coated with Weatherguard™ Protection to withstand harsh weather conditions and prevent corrosion. Meets ANSI/BHMA A156.14, Grade 2