Hollow metal doors are the most common commercial door type used in schools, stairwells, offices, mechanical rooms, and exterior service entrances. Unlike wood doors, steel doors cannot be trimmed — which means the threshold height must be selected correctly to maintain door clearance and pass inspection.
Choosing the wrong threshold often causes door dragging, excessive bottom gap, failed fire inspections, or accessibility violations.
The threshold does not solve sealing alone — it sets the clearance so the door bottom seal can work correctly.
Because hollow metal doors are fixed in steel frames, the threshold height must be selected to match the existing opening clearance.
A properly functioning commercial opening uses multiple components:
Trying to seal a door using only a threshold usually causes the door to bind or fail inspection.
ADA Compliant Thresholds - 1/2" accessible openings
Fire Rated Thresholds - inspection compliance
Exterior / Water Protection - weather exposed doors
Saddle Thresholds - standard commercial replacement
Thresholds With Vinyl Seal - improved sealing performance
Browse stocked sizes and configurations here:
Hollow Metal Door Threshold Parts
Selecting the correct threshold ensures proper door operation, accessibility compliance, and inspection approval.
Whether you need a quotation or just have a question about a product. Reach out to us today by calling 866-232-5673 or text us questions and photos at 210-275-8966, and one of friendly specialists will be happy to help!