 The original building 's main floor has vaulted ceilings , large windows , brick walls , a flat roof , and wooden cross beams . The mezzanine consists of three rooms . The second floor has large windows and vaulted ceilings , restrooms , and a lunchroom . Stairs and elevators connect the levels , including the basement and its boiler room . A lobby and office in the southwest corner of the main floor can be entered from inside or via the original main door off Southeast 10th Avenue . 
