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MDI® Door is a Certified Green Site

Your Source for Architectural & Commercial Grade Doors, Frames, Hardware & Accessory Products

...Standard & Custom Engineered Doors & Frames


  • Non-Fire Rated Applications
  • Standard Sizes Only

Standard Construction

Solid Core Construction

Section of Kalamein Door: "A"


Wood cores shall be fabrication of kiln dry, clear white pine.  Cores shall be free from knots, shakes and other defects.  Stiles shall be unbroken and will extend the full height of the door.

All stiles shall be drawn through steel dies to ensure a tight contact of metal to the wood.  Seams shall be construction of "lockseam" construction.

Cores will be completely covered with 24 gauge galvanneal steel.

Preparation of hardware can either be done in Metropolitan's fabrication shop provide we are supplied with the necessary template information or hardware preps can be performed at the jobsite by the contractor or installers.

Metropolitan Door Industries recommends that all our steel doors/frames are finished painted (by others) with an "oil-based" finish paint.


Kalamein doors are not accepted for use in fire rated openings.  Kalamein doors are best suited for "door only" replacements in non-rated applications where a door is needed in a "rush" situation.  Only standard sizes are available in Kalamein doors.


Need assistance, contact us.

Metropolitan Door Industries Corp.

350 Thorens Avenue

Garden City Park, NY 11040  

MDI® Office Hours:

Monday to Friday

8 am to 5 pm EST

Toll Free: 1-888-634-3667


Local: 516.294.1801

Fax: 516.294.1828

Copyright © 1999-2013 Metropolitan Door Industries Corp.

® MDI and the MDI designed logo are registered trademarks of Metropolitan Door Industries Corp.