Karpen Steel fabricates Seamless Edge, Vertically Steel Stiffened Doors, 1 3/4",  and 1 3/8" up to 2" thick as specified, as well as 1 3/4" polystyrene core doors. Thicker doors, steel stiffened, over 2" are also available.

Material

• 18- 16- or 14-gauge face sheets of commercial grade Cold Rolled Steel.
• 18- 16- or 14-gauge face sheets of commercial grade A60 Galvannealed.
• 12-gauge face sheets. 12-gauge Door Specifications

Core

• Standard Core:
  • Doors shall have continuous vertical interlocking steel stiffeners of 20-gauge and shall be spaced no further than 8" on center.
  • Doors shall be filled with mineral rock wool.
• Alternate Core for 1 3/4" thick doors:
  • Polystyrene Core with a density of 1 lb/cubic foot.
  • Face Sheets for Polystyrene Core: A60 Galvanneal

Reinforcements

• Top and bottom of doors shall be reinforced with continuous 16-gauge steel channels, spot welded to both sides of doors.
• Hinge reinforcements shall be 11-gauge steel angle, 12" long
• Cylindrical lock reinforcement shall be 16-gauge with 11-gauge thread depth. Other lock and closer reinforcements shall be 12-gauge.
• Doors shall be reinforced for all surface type hardware. Drilling and tapping of surface hardware to be done in the field by the erector.
• Edges of door shall be continuously seam welded, ground, and filled to ensure a smooth finish.

Finish:

• Doors shall be thoroughly cleaned after assembly and given a prime coat of rust inhibiting paint. The primer shall be air dried. Low gloss oil base trim paints (max gloss 25) are recommended as a finish paint.

Undercut:

• 3/4" standard. Other undercuts as specified.

Hinge Backset: (1 3/4" thick doors)

• 1/4" standard. 3/16" or 1/8" available.

Bevel: 

• 1/8" in 2" standard. (18, 16 and 14 gauge doors)
• Square Edge standard (Polystyrene Core and 12 gauge doors)

Astragals:

• Flat 14-gauge astragals are provided with pairs of doors as needed and are shipped loose for field mounting. Flat Astragal Drawing: cudm0006.pdf
  
• "Z" Astragals are available with or without hardware preps for an additional charge. These can be ordered for existing doors or for use with doors by Karpen Steel. "Z" Astragal Drawing: cudm0099.pdf. 

Size Limitations:

• Largest single door available up to 1 3/4" thick:
  

  Gauge	Material	Size
  18	CRS or A60 Galvanneal	4'-7" x 10'-0"
  16 or 14	CRS or A60 Galvanneal	4'-7" x 10'-0"
  12	HRPO or Galvanneal	4'-7" x 10'-0"

Door Design Drawings: cudm0002.pdf , cudm0002.dwg

INTERNAL DOOR DETAIL-Vertically Steel Stiffened

cudm0001.pdf       cudm0001.dwg

INTERNAL DOOR DETAIL-Polystyrene Core Detail

cudm0015.pdf       cudm0015.dwg

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