Re-measure door force and closing speed after every hardware change

Bottom line: an electric strike, maglock, door-position switch, cable transfer, new seal, or access-control timing change can alter how a door opens, closes, and latches. The finished assembly should be measured again rather than accepted from component submittals.

Source fact: accessibility standards specify closing time and opening force

Sections 404.2.8 and 404.2.9 of the 2010 ADA Standards — Closing Speed and Opening Force address closing speed and opening force. The standards specify a minimum closer sweep time from 90 degrees to 12 degrees, a separate minimum time for spring hinges, and a maximum force for opening specified non-fire-rated interior hinged, sliding, and folding doors. The text includes exceptions and treats fire doors differently for force.

These criteria apply to the opening in operation. A closer’s model rating or an installer setting is not the same as a measurement after every latch, seal, hinge, and access-control component is engaged.

Source boundary and applicability

The Access Board standard is an authoritative federal source, but the correct requirement depends on doorway type, accessible route, fire rating, referenced standards, local adoption, existing-facility status, and authority having jurisdiction. The cited force provision does not set a universal five-pound maximum for every door. This article is not legal or code advice.

Applicability questions

• Is the door fire-rated, on an accessible route, or part of required egress?
• Which closer, hinge, latch, lock, seal, operator, and transfer device affect movement?
• Does access authorization fully release the latch before the user applies force?
• Are measurements being taken at the correct location, direction, and door state?
• Can seasonal pressure, temperature, flooring, or building airflow change performance?

DSE recommendation: make operational measurement a closeout requirement

The following steps are DSE recommendations based on the cited source.

Have qualified door, accessibility, and fire/life-safety personnel identify the applicable criteria and measurement method. After final access-control programming and complete hardware adjustment, measure opening force and closing behavior in all relevant operating modes. Verify authorization, latch release, manual operation, relatching, door-position monitoring, and any automatic operator together.

If adjustment improves force but prevents reliable latching or required fire-door behavior, stop and resolve the system-level conflict; do not defeat a closer, latch, or rated assembly. Re-test after seasonal commissioning where pressure or weather produces material variation.

Verification and evidence

Retain the applicable-criteria determination, door and hardware schedule, instrument identification, method, measured values, access-control state, environmental conditions, deficiency and correction record, and qualified sign-off. Add remeasurement to change control for strikes, maglocks, closers, seals, hinges, operators, fire interfaces, and unlock timing.

Official references

• 2010 ADA Standards, Sections 404.2.8 and 404.2.9 — Closing Speed and Opening Force – United States Access Board