Adams Rite 3890-08-313 Aluminum Mullion Exit Device

Product Description

The ADAMS RITE 3890-08-313 is an aluminum mullion designed for use with exit devices on door assemblies supporting doors up to 8.25 pounds. A mullion is a vertical structural divider mounted between paired doors or between a door and a fixed frame panel, providing a secure anchor point for exit hardware. This component is sold individually and is intended for installation by licensed door hardware technicians or commercial glazing contractors working on aluminum storefront and framed door systems.

This mullion is suited for commercial door applications where exit device hardware must be mounted to a center post between paired aluminum doors. It is commonly found in retail, office, and institutional entryway assemblies where code-compliant egress hardware is required. The 8.25-pound door weight rating should be verified against the specific door assembly before installation.

Key Features

• Aluminum construction for corrosion resistance in commercial entryway environments
• Supports exit device installations on doors up to 8.25 pounds
• Sold as individual unit for single-point replacement or new installation
• Designed for use in aluminum framed door and storefront systems

Compatibility

Designed as an OEM-style replacement or new-installation component for aluminum framed exit device door assemblies. Consult ADAMS RITE documentation to confirm fitment with specific exit device models and door frame configurations.

Installation Notes

Installation should be performed by a qualified door hardware technician or commercial glazing contractor familiar with aluminum storefront systems. Ensure all door panels are properly supported and the frame is plumb and square before securing the mullion. Verify that the exit device hardware is compatible with this mullion profile prior to installation. Local building codes and fire egress requirements should be consulted to confirm compliant hardware configuration.