Fire-Rated Metal Doors and Frames

A 20-minute fire-rated steel door is an opening assembly engineered and tested to maintain fire containment and structural integrity for twenty minutes during a fire event. In commercial building construction, these doors are frequently specified for corridor entrances and smoke barriers. They are fabricated from durable steel gauges and built with tested internal cores to fulfill life-safety and egress building code requirements.

Fire-rated hollow metal doors and frame assemblies can be fabricated across multiple thicknesses to meet varied structural and security demands. Available options range from 18 gauge to heavy-duty 12 gauge steel for doors, while frame profiles and engineered sidelite or transom assemblies are available in 16 gauge to 12 gauge steel, providing strength for high-traffic commercial installations.

Custom fire-rated hollow metal doors can be configured with several internal core options depending on performance requirements. These include polystyrene cores, polyurethane cores, temperature rise cores designed to limit heat transfer on the non-fire side of the door, and steel-stiffened cores for increased structural rigidity in demanding commercial and institutional building egress applications.

Hollow metal frames for fire-rated openings are available in fully welded or cut-and-notch knockdown configurations. Options encompass standard three-sided doorway frames, double egress frames, pocket door frames, and specialized engineered assemblies such as glazed or paneled sidelite frames, transom frames, and borrowed light assemblies, built to comply with UL and NAAMM/HMMA specifications.

Yes. Fire-rated hollow metal doors and frames can be manufactured using A60 galvannealed steel or corrosion-resistant stainless steel. These material selections ensure durability and reliable service life across diverse environments, from standard commercial construction projects to healthcare and medical facilities that require specialized finishes or lead-lined radiation shielding considerations.

Lead times vary by configuration and schedule program. Standard lead times run five to seven business days for hollow metal frames and seven to ten business days for hollow metal doors. Expedited quick-ship options are also available, offering turnaround schedules ranging from select same-day or one-day programs up to five business days for urgent job-site requirements.