Wall and post mounted objects between 27” and 80” above finish floor to project no more than 4” into corridor, walk or aisle.
CBC 1133B.8.6.1 ADAAG 4.4.1
Walks, halls etc. to have min. clear headroom of 80”.
CBC 1133B.8.6.2 ADAAG 4.4.2
Walks & pedestrian ways which are part of the egress system to have min. clear headroom of 84”.