If pressure mats are required for doors increase the depth of the vestibule to the combined length of the mats plus 12 inches minimum. Vestibule width for one door should be at least five feet to accommodate two wheelchairs and seven feet for two doors. Locate lever type handle 36 inches to 38 inches above floor. Consider remote or power assist for exterior door. Use a lever type handle and a second pull handle should be located 8 inches from the hinge side of the door to assist in closing the door 32 inches to 36 inches above the floor.
Pocket doors are preferred providing latches and operators are useable.
Try to make provision for a second apartment block intercom to be installed in the master bedroom. This unit would not be wall mounted but instead fits into a box to allow the unit to be portable. The unit would be connected through a terminal strip located in the master bedroom. Controls for the electric lock of the apartment door entrance could also be connected to this intercom box. Please consult further for details.