 Below ground @-@ level on the north side , the first floor includes a cafe and study rooms . The main floor , which is the second floor , includes a two @-@ story atrium as well as the circulation desk and main entrance . The third floor contains the OSU Archives , and along with the fourth floor , houses the library 's offices . A children 's library and the special collections are located on the fifth floor , while the sixth floor only covers the southern two @-@ thirds of the structure . 
