NCHM Manufactures Stainless Steel, Galvanneal, and Lead Lined Doors available in the internally reinforced & stiffened DP Series and the steel stiffened DS Series.

 

DP Series doors

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DP Series doors are internally reinforced, stiffened, insulated and sound deadened by a permanently laminated (bonded) solid slab of expanded polystyrene foam core on the inside of each face skin.

The complete unit is closed with 14-gauge steel, perimeter channels, spot-welded at 8″ on center. Doors have square edges with exposed full height hairline seams. (When required, we can furnish doors without vertical edge seams.)

We mortise and reinforce our doors with 3/16″ hinge tap plates. Lock reinforcements are 16-gauge box-type.

Closer reinforcements are 12-gauge when required. We provide other hardware reinforcements as required.

National DP Series doors are thoroughly cleaned and finished as standard, with one coat of rust-inhibitive prime paint. Our doors are individually crated.

Door Specifications:

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DP Series Doors are full flush design as manufactured by National Custom Hollow Metal and designated as:

  1. DP-418—1-3/4″ thick, 18-gauge steel
  2. DP-416—1-3/4″ thick, 16-gauge steel
  3. DP-414—1-3/4″ thick, 14-gauge steel
  4. DP-412—1-3/4″ thick, 12-gauge steel

DP Series Doors are full flush construction and conform to:

  • Commercial Standards
  • Federal Specifications

Specify as required:

  1. Galvanized steel in accordance with ASTM A525.

Features:
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  • Steel glass kits
  • 3/16″ thick hinge reinforcing plate
  • 16-gauge lock reinforcing
  • Polystyrene core

 

DS Series Doors

Steel Stiffened Door Specifications :

DS Series Doors will be as manufactured by National and designated as:

(Specify as required)

  • DS-416—1-3/4″ thick, 16-gauge steel
  • DS-414—1-3/4″ thick, 14-gauge steel
  • DS-412—1-3/4″ thick, 12-gauge steel

Doors conform to:

  • Commercial Standards
  • Federal Specifications

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Vertical reinforcements are 6″ on centers and spot-welded to each face skin. On labeled doors, all spaces between each reinforcement are sound deadened with .6 pound density mineral wool batts (fiberglass insulation).

Doors have square hinge and lock edges with visible edge seams.

(When required, we can furnish doors with edge seams welded, filled and ground smooth.)

Top and bottom inverted 14-gauge steel reinforcing channels are spot-welded within the doors.

(When required, we can furnish doors with top and bottom closing channels.)

We mortise and reinforce our doors with 3/16″ thick hinge tap plates. Lock reinforcements are 14-gauge steel.

Closer reinforcing will be 12 gauge when required. We provide other hardware reinforcements as required. All doors have spot-welds on face skins, filled and ground smooth. They are thoroughly cleaned and finished as standard, with one coat of rust-inhibiting prime paint.

We furnish our doors with Underwriters Laboratories, Inc. or Warnock Hersey certified labels where required.