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2. Crittall Windows - Wikipedia

   en.wikipedia.org/wiki/Crittall_Windows

   Crittall Windows Ltd is an English manufacturer of steel-framed windows, today based in Witham, Essex, close to its historic roots in the county. Its products have been used in thousands of buildings across the United Kingdom, including the Houses of Parliament and Tower of London , and are features particularly associated with the Art Deco and ...

3. Steel frame - Wikipedia

   en.wikipedia.org/wiki/Steel_frame

   Steel frame structure Rectangular steel frame, or "perimeter frame" of the Willis building (at right) contrasted against the diagrid frame at 30 St Mary Axe (at center), in London. Steel frame is a building technique with a " skeleton frame" of vertical steel columns and horizontal I-beams , constructed in a rectangular grid to support the ...

4. Door frame - Wikipedia

   en.wikipedia.org/wiki/Door_frame

   A door frame, window frame, door surround, window surround, or niche surround is the architectural frame around an aperture such as a door or window.. Entrance door and surround of a house in Charleston, South Carolina A interior doorway consisting of door, transom, and door surround in a historic house in Kentucky, United States

5. Window - Wikipedia

   en.wikipedia.org/wiki/Window

   A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air.Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame [1] in the opening; the sash and frame are also referred to as a window. [2]

6. Jeld-Wen - Wikipedia

   en.wikipedia.org/wiki/Jeld-Wen

   In 2016, door manufacturer Steves & Sons sued JELD-WEN on antitrust grounds for its 2012 acquisition of rival doorskin manufacturer Craftmaster International (CMI). In 2021 the Fourth Circuit affirmed the trial judge's remedy that JELD-WEN must sell CMI's Towanda factory, which was the first time that a private lawsuit led to an order to divest ...

7. Hörmann - Wikipedia

   en.wikipedia.org/wiki/Hörmann

   Since that time, its product range has expanded to include wooden interior doors, canopies, steel sheet doors, door frames, interior and exterior entrance doors, manual and drive-driven industrial door systems, and state-of-the-art fire protection and multifunctional door systems for commercial real estate.