ADA Compliant Commercial Door Thresholds - 1/2" Barrier Free Accessible Openings

Choosing the Correct Threshold for ADA Accessibility

An incorrect door threshold is one of the most common causes of accessibility violations in commercial buildings. If a threshold is too tall, too steep, or improperly installed, it can prevent wheelchair access and fail inspection under ADA Standards for Accessible Design and ICC/ANSI A117.1.

Most commercial openings require a maximum 1/2" threshold height with a beveled transition. This allows carts, wheelchairs, and pedestrian traffic to pass safely while maintaining proper door operation.

When an ADA Threshold is Required

• Main building entrances
• Public access doors
• Office corridors
• Restroom doors
• Schools and healthcare facilities
• Government buildings
• Any opening subject to accessibility inspection

If the opening serves the public or employees, it almost always requires a barrier-free threshold.

ADA Threshold Height Rules

Thresholds taller than 1/2" typically fail ADA inspection unless part of a specialized assembly. Many residential or imported thresholds exceed this limit and cannot be used on commercial openings.

Fire Rated Doors and ADA Compliance

Fire rated doors still require ADA compliant thresholds. A common mistake is installing a tall threshold to seal smoke or water, which then violates accessibility requirements.

The correct solution is a properly designed system:

• 1/2" ADA threshold
• Door sweep or automatic door bottom
• Perimeter gasketing

This maintains fire door clearance requirements (NFPA 80) while preserving accessibility.

Watch Installation Overview

Shop ADA Compliant Thresholds

Below are commercial-grade thresholds designed for accessibility-compliant openings:

View ADA Saddle Thresholds
View ADA Thresholds With Seals

Common Inspection Failures

• Threshold height exceeds 1/2"
• Sharp vertical edge
• Improper bevel slope
• Door clearance interference
• Wrong threshold used to solve water problem

Choosing the correct threshold prevents costly rework and failed inspections.

Need Help Choosing?

Door Closers USA specializes in code-compliant commercial openings. If you are unsure which threshold is required for your opening, start with your door type:

Hollow Metal Door Thresholds
Storefront Door Thresholds
Wood Door Thresholds

Installing the correct ADA threshold protects accessibility, safety, and inspection approval.