Aug 26, 2021 · A fixed mullion between two door leaves is used to separate a pair of doors into a bank, allowing for single door performance in double door openings. The fixed mullion is welded to the frame head, meaning it cannot be removed.

Feb 26, 2018 · On a pair of doors a mullion can separate the two doors from each other. Mullions between a pair of doors adds security and, if it is removable, allows large material or equipment to pass through the opening. The doors can also more …

Oct 29, 2024 · Mullions are doorframe parts that separate and support the different sections of a door. In addition to adding structure, these parts can also be decorative and provide security. There are four mullion types: fixed, removable, glass, and reinforced.

When two individual windows or a door and window are joined, the seam between the frames of the two units is called the mull, which is short for mullion. In this case, a door jamb has been joined to a window/sidelight jamb.

Mar 19, 2025 · A mullion is a vertical bar that divides a door or window frame into separate sections. Invented during the Middle Ages, they were a common design element in Renaissance, Victorian, and Gothic architecture.

Mar 24, 2025 · Mulling is the process of attaching multiple window or door frames together using a mullion or structural reinforcement. This technique allows for the seamless installation of multiple windows or doors as a single unit, reducing the need for separate framing elements. Key Components of Mulling

Dec 25, 2024 · A mullion is a structural element that divides a large window or door opening into smaller sections, known as lights. Mullions are commonly used in window systems to support the weight of glass panes and to provide aesthetic definition to large openings.

Feb 12, 2025 · A mullion is a vertical or horizontal partition that divides units within a window or door frame. Its prime purpose is to give structural support and add more visual appeal to the installation. Types of Mullions You Should Know

Mar 6, 2020 · Muntins separate panes of glass, while mullions divide two or more windows or door frames together. They can run both horizontally or vertically. Mullions serve many purposes. For example, they can divide a stationary and a movable set of windows, so you can easily allow fresh air into your home.

Also known as mullions, these posts allow surface-mount exit devices to be used on double doors. They accept the strike plates included with standard and impact-resistant devices. Supports are removable to allow large equipment through.