Door Protective and Reopening Device [4.10.6]
Door reopening devices must be able to detect obstructions without contact; otherwise, they can disrupt the balance of people using crutches or canes. They must stop and reopen doors for at least 20 seconds (while obstructed); doors do not have to fully reopen and can close sooner if no longer obstructed. Door safety edges, used alone as the reopening device, are permitted only in alterations where installation of an automatic reopening device is not technically feasible.
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