I’m on the road today so this will be a quick post. I saw this application the other day, while I was taking photos for an upcoming article in Construction Specifier. The article covers several accessibility topics, including the requirement for a 10-inch smooth surface at the bottom of the push side of manual doors. I saw plenty of doors with protruding hardware in that 10-inch area, including this one with 3 problems – a bottom rail that is too narrow, a protruding full-height pull, and a protruding thumbturn for a bottom rail deadbolt.
Then I noticed the door below, which offers an alternative to a kick-down stop or other type of hold-open. This looks like a cylinder-operated deadbolt, with a thumbturn instead of the interior cylinder. The thumbturn is above the 10-inch height and does not impact the 10-inch smooth zone.