DKS 18-Gauge Galvanized Steel Standard Flush Doors – 1800 Series

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DKS 1800 Series 18-Gauge Galvanized Steel Standard Flush Doors

Our 1800 Series standard flush doors combine 18-gauge galvanized steel with a full-body polystyrene core and a clean, seamless edge appearance. The non-handed design, reversible hinge reinforcement, and prepared hardware locations help you coordinate commercial openings, while our factory-applied grey epoxy primer provides a uniform starting finish.

Practical Uses

  • Commercial interiors: Choose our flush door design for offices, corridors, and other openings where a plain steel door appearance is preferred.
  • Replacement projects: Coordinate the door size, hinge locations, and lock preparation with the existing frame and approved hardware schedule.
  • Rated openings: Coordinate the required fire, smoke, or windstorm configuration with the appropriate labels, frame, hardware, and installation requirements.

Everyday example: For an office corridor renovation, confirm the opening dimensions and existing hinge locations, then choose the matching lock preparation so your new 1800 Series door fits the frame and works with the planned hinges, latch, and closer.

Fit and Preparation

Our 1800 Series product guide covers multiple sizes and preparation combinations. Confirm your exact size, hardware locations, preparation, and availability with us before ordering; the guide describes the series and does not mean every configuration is included in this listing.

  • Size coordination: Verify door dimensions, frame opening, finished floor, threshold, and undercut before selecting a configuration.
  • Handing: Our non-handed design uses reversible hinge reinforcement. Coordinate the final swing and hardware arrangement with the opening.
  • C: Cylindrical lock preparation.
  • MB: Mortise blank preparation.
  • BR: Blank reinforced preparation for compatible surface-mounted hardware.
  • Other preparations: Our guide includes cylindrical/deadlock configurations with different center-to-center dimensions. Verify the exact preparation against your hardware template.
  • Hardware locations: Match the selected hinge and lock locations to the frame. Our guide includes alternate location patterns, including S-prefix Steelcraft-location 8-foot doors.
  • Continuous hinges: Prepared for continuous hinge application; confirm the hinge template and fasteners for your configuration.

Not sure which swing you need? View our door and frame handing diagram (PDF) before coordinating the frame and hardware.

Hinge Locations by Door Size

Our Door Hinge Cross Reference Chart gives the following dimensions for the standard DKS location pattern. Dimensions are in inches, referenced from the top of the door as illustrated in our chart. A, B, C, and D identify successive hinge locations. Use the drawing's measurement points and verify the selected location pattern before comparing an existing door or frame.

  • 3068: A = 7-3/8 inches; B = 37-5/16 inches; C = 67-1/4 inches.
  • 3070: A = 7-3/8 inches; B = 39-5/16 inches; C = 71-1/4 inches.
  • 3080: A = 7-3/8 inches; B = 32-11/16 inches; C = 58 inches; D = 83-5/16 inches.

View our hardware-location reference drawing (PDF). Alternate location patterns use different dimensions. Coordinate lock locations with the selected preparation and approved hardware template; do not substitute hinge measurements for lock centerlines.

Installation Guidance

Install our doors only in a frame that is plumb, level, square, securely anchored, and correctly sized. Support the door while hanging it, use the specified hinge fasteners, and check for a free swing and proper latch engagement before adjusting the closer. Protect the door from moisture and jobsite damage, and keep labels visible. For labeled openings, verify the supplied door label and compatible frame and hardware, and follow our installation instructions before making field modifications.

Problems It Helps Address

  • Visible edge seams: Seamless filled edges and continuous laser welding on both edges provide a clean edge appearance.
  • Hardware mounting needs: Dedicated hinge and closer reinforcements provide prepared mounting locations for compatible hardware.
  • Opening coordination: Our non-handed design and multiple preparation families let you match the intended opening when the correct configuration is ordered.
  • Core requirements: A full-body polystyrene core provides the specified construction for projects calling for this core type.

Product Details

  • Series: DKS 1800 Series standard flush hollow metal door.
  • Face material: 18-gauge galvanized steel.
  • Core: Full-body polystyrene.
  • Edges: Seamless filled edges with edge/corner seam construction; continuous laser welding on both edges.
  • Handing: Non-handed design.
  • Closer reinforcement: 12-gauge steel.
  • Hinge reinforcement: 7-gauge, reversible.
  • Top cap: 16-gauge galvanized flush top cap.
  • Bottom cap: 16-gauge galvanized inverted bottom cap.
  • Standard preparation families: 161, Fed 86 edge, and panic bar reinforcement, subject to the selected configuration.
  • Continuous hinge preparation: Prepared for continuous hinge application.
  • Fire and smoke listing: Our series specifications include WHI/ITS ratings up to 3 hours, positive pressure, and “S” smoke. Verify the rating and label supplied for your exact opening configuration.
  • Standards: Meets or exceeds ANSI 250.4 and ANSI 250.8.
  • Windstorm approvals: Hurricane tested with Florida approval FL-41130 and Texas approval DR-472. Confirm that your exact door, frame, hardware, and installation configuration is covered by the applicable approval.

Available Finish

Our factory-applied finish is baked-on grey two-part epoxy primer. Coordinate any finish painting with our painting instructions and your project requirements.

Manufacturer Documents

Shipping Information

⚠ This product ships via LTL (Less Than Truckload) freight due to its size and weight. Shipping costs are not calculated at checkout. After placing your order, a member of our team will contact you with a freight quote for your approval before shipment. For shipping inquiries prior to ordering, please contact us.