Steel Stiffened / Polystyrene Core Doors

Lindstrom Corporation fabricates Vertically Steel Stiffened and Polystyrene Core Doors, 1-3/4' thick as specified.

Doors will be fabricated of:

• 16- or 14-gauge face sheets of commercial grade Cold Rolled steel
• 16- or 14-gauge face sheets of commercial grade A60 Galvanized
• Doors will have continuous vertical steel stiffeners of 20-gauge and will be spaced no further than 8” on center.
• Doors will be filled with mineral rock wool. Polystyrene core optional.
• Top and bottom of doors will be reinforced with continuous 16-gauge steel channels, spot welded to both sides of doors.
• Hinge reinforcements will be 7-gauge steel angle, 12" long.
• Cylindrical lock reinforcement will be 16-gauge with 11-gauge thread depth. Other lock and closer reinforcements will be 12-gauge.
• Doors will be reinforced for all surface type hardware. Drilling and tapping of surface hardware to be done in the field by the installer.
• Edges of door will be seam welded and ground to ensure smooth finish.

Finish:

• Doors will be thoroughly cleaned after assembly and given a prime coat of rust-inhibiting paint.
• The primer will be air dried.
• Low gloss oil based trim paints (max gloss 25) are recommended as a finish paint.
• Undercut: 3/4” standard.

• Undercuts: 3/4" standard.
• Other undercuts as specified.
• Hinge Backset: 1/4” standard.
• 3/16" or 1/8" available.
• Astragals: Flat 14-gauge astragals are provided with pairs of doors as needed and are shipped loose for field mounting.
• Size Limitations: Largest single door available:
  16-: 4'-0" x 10'-0"
  14-: 4'-0" X 10'-0"

Sample: