Dec 25, 2024 · In construction, the term mullion refers to a vertical or horizontal bar that divides and supports sections of windows, doors, or other types of openings. Mullions are crucial components in architectural design and are commonly used in both residential and commercial construction projects.

Mullion Styles. The two standard mullion styles are the Recessed 2” (50mm) style, which is detailed on the far left, and the Flush 4” (100mm) style, which is detailed on the right.

Feb 26, 2018 · A Complete Guide to Mullions. A mullion is a part of a frame that divides or separates the frame into different sections. Mullions can be integral parts of the frame or they can be removable, depending on the application. Mullions can be vertical or horizontal pieces.

Jan 14, 2025 · Steel mullions are often used in buildings where strength and durability are paramount. Steel provides a higher strength-to-weight ratio than aluminum, making it suitable for larger window systems or high-rise buildings where load-bearing capabilities are crucial.

Free shipping on Von Duprin 4954 removabale steel mullions used to adapt a double door into two single doors. Compatiable with all Von Duprin rim devices.

Dec 29, 2024 · Steel mullions are often used in commercial buildings or large-scale projects due to their strength and durability. Steel offers excellent support for large, heavy glazing systems, making it ideal for curtain wall systems or skyscrapers.

A mullion is a vertical element that forms a division between units of a window or screen, or is used decoratively. [1] It is also often used as a division between double doors. When dividing adjacent window units its primary purpose is a rigid support to the glazing of the window.

This lockable, steel mullion is available in multiple lengths, offering flexibility to be used an any non-fire rated openings.

Today’s steel framed curtain walls can handle a greater wind load than aluminum. For example, an aluminum mullion of 2.5 x 7.5 inches with a 5-foot mullion spacing at a 30-lbs/sf-wind load can span up to 12.5 feet, including the glass and exterior cap.

The SteelBuilt Curtainwall Infinity™ System can use as a back mullion almost any type of custom steel member, allowing architects and designers to use larger areas of glass, smaller frame profiles and greater free spans.