Public Entrances

 ADA Section 206.4.1 requires that 60 percent of all public entrances shall comply with the door requirements listed in section 404.  A public entrance is defined as:

"An entrance that is not a service entrance or a restricted entrance"

This means that if the entrance is available for the general public to use, then it will be  a public entrance.

This is a tenant space with a tenant entrance

Parking Structure Entrance 

Each direct access to the building from the parking structure

Entrances from Tunnels or Elevated Walkways 

At least one direct entrance to the building must be accessible.

Transportation facilities 

At least one public entrance serving each fixed route or group of fixed routes

Section 404 explains the requirements for the doors located at the entrances.  There should be proper widths, proper hardware and maneuvering clearances.  If the doors are not on grade and a ramp is required to access them, a landing at the top and bottom of the ramp should be provided and should coincide with the maneuvering clearances a the doors.  The image below shows an entrance, but not accessible (even though it shows the universal symbol of access)  ;-)

A restricted entrance is defined as:

"Restricted entrance is an entrance that is made available for common use on a controlled basis but not public use and that is not a service entrance."

At least one of restricted entrance to the building or facility shall comply with Section 404.

At least one primary entrance a residential dwelling unit that has to comply with ADA  shall comply. Residential dwelling units that is required to comply with ADA are group homes, homeless shelters,  faculty and director's residences in places of education and sleeping quarters for emergency personnel.

Where entrances used only by inmates or detainees and security personnel are provided at judicial facilities, detention facilities, or correctional facility, at least one such entrance shall comply.

A service entrance is defined as:

"Service Entrance is an entrance intended primarily for delivery of goods or services."

If a service entrance is the only entrance to a building or to a tenancy in a facility, that entrance shall comply with Section 404.  Otherwise it is not required to.