343 Sansome Street, San Francisco CA, USA - Otis Elevonic 401 Traction Elevator (Up-riding)

There are not many buildings that are open to public access, but this is one of them with a roof terrace and named as one of the best.

Technical Specifications :
Floors served : 1 to 16
Capacity: 18 persons/3000lbs
Manufacturer : Otis Elevator Company
Model: Elevonic 401(M)
Year installed: 1920 (Original), 1985 (E401)
History : Modernized

[Spaceshotx]

When you get into the building, aren't there security turnstiles? Where do you get the Elevator to the rooftop deck?