In the design of a barrier-free access route, door locksets should be equipped with which one of the following?

For barrier-free (ADA) accessible routes, operable parts such as door hardware must be usable with

one hand and not require tight grasping, pinching, or twisting of the wrist (2010 ADA Standards

§404.2.7). Lever handles meet this requirement because they can be operated by users with limited

grip strength or dexterity.

A . Grip handles with thumbpieces — Often require pinching or twisting; not compliant for barrier-

free.

B . Knurled knobs — Non-compliant because they require twisting and strong grip; also typically used

for hazardous rooms as a tactile warning.

D . Panic devices — Allowed in certain egress conditions but not the universal ADA hardware

requirement for standard accessible doors.

PDD Reference: ARE 5.0 Handbook, PDD “Codes and Regulations—Accessibility,” 2010 ADA

Standards §404.2.7, ICC A117.1 Accessibility Standard.