Hollow Metal Doors

Stocked hollow metal doors are available from Mills & Nebraska with Same Day lead times, and our Lakeland location offers same-day will-call or jobsite delivery. Custom sizes, gauges, hardware preps and ratings are quoted per project once our team has reviewed the door schedule.

Yes. Mills & Nebraska supplies hurricane-rated hollow metal door assemblies for Florida projects, including products with Miami-Dade NOA approval for the High-Velocity Hurricane Zone (Miami-Dade and Broward counties). The door, frame, anchors and hardware must match the tested assembly.

Yes. Many hollow metal assemblies are tested for both fire resistance and wind load, which is common on Florida stairwells, corridors and exterior exits. The door, frame and hardware must be installed exactly as listed to keep both ratings.

Choose hollow metal where durability matters most: exterior and hurricane-rated openings, stairwells, service areas and openings that need the highest fire ratings. Choose wood doors for finished interiors such as hotel rooms, offices and courtrooms, where a veneer face, sound control and ratings up to 90 minutes meet the need.

Exterior doors usually get an insulated core, such as polystyrene or polyurethane, to limit heat transfer into an air-conditioned building. Steel-stiffened cores add rigidity for heavy-use, oversized or high-abuse openings, and honeycomb is an economical interior core. On a wind-rated or fire-rated door, use the core named in the approval or listing.

Only within narrow limits. NFPA 80 allows limited job site work, such as holes for surface-applied hardware, but cutting, trimming or adding new preps beyond what the listing permits can void the fire label. That is why Mills & Nebraska makes hardware preps and vision lite cutouts before a rated door ships.

The fire label is usually on the hinge edge of the door, with a separate label on the frame, commonly on the hinge jamb. It names the certifying agency, the rating and a serial or listing number. Labels must stay legible, so they should never be painted over or removed; doors we label carry our Intertek certification.