
For those with a UniCard or PHCard (that has been unlocked for library access), the UB 1 is open 24 hours a day, seven days a week. Private users may use the UB 1 during the regular opening hours.
The keys to the coatroom lockers are available Monday to Friday from 8:00 a.m. to 8:00 p.m., and on Saturday and Sunday from 10:00 a.m. to 8:00 p.m.; they may be obtained from the entrance desk and are checked out with your library card. Those with a UniCard or PHCard can also use their card to check out a cubby in the rear coatroom.

Holdings in the UB 1
- Book collections in the Reading Room (with the exception of LS-Buch and LS-HSS)
- Reading Room periodical collections from the last 20 years (including all issues of the current year of all library periodicals)
- Selection of newspapers in paper and microform
- Open access area for the location codes GE, SW, NA, MD (each including materials acquired since the year 2000), FZ and LB I
- Music recordings

Services in the UB 1
- Information & Service, media loans, and checkout desk, including information about the Reading Room and periodicals (please note the opening hours)
- Loans, holds, and returns of materials requested from the closed stacks or borrowed from the self-service area of the UB 1 (please note the opening hours)
- Direct loans of materials from the self-service area in the UB 1 (please note the opening hours)
- Approximately 250 internet, database, and computer workstations with access to the online catalog
- 744 workstations for reading and studying (including Wi-Fi)
- 430 lockers for three-month use (registration for university students, PH students must register directly at the service desk at the UB 1)
- Competence and Learning Center (KuLZ)
- Around 100 workstations in the cafeteria (under the stage, access through the hall) for group work. The area is Wi-Fi equipped. A purchase from the cafeteria is not necessary in order to use these workstations.
- Seminar Room

Layout

| 1 | Key checkout for lockers |
| 2 | Lockers |
| 3 | PC workstations, laptop cabinets, long-term lockers |
| 4 | Copier |
| 5 | Scanner |
| 6 | Newspaper reading area |
| 7 | Stairs to workstations (gallery) and Learning Center |
| 8 | Information & Services (registration, media loans, checkout desk) |
| 9 | Exit (with surveillance and checkout of UB 1 materials) |
| 10 | Entrance |
| 11 | Self-pickup Shelves |
| 12 | Stairs to workstations (gallery) and Seminar Room |
| 13 | Workstation for the blind |
| 14 | Reading Room: Monograph area |
| 15 | Reading Room: Periodicals area |
| 16 | Stairs to periodicals area/checkout: Copiers, lockers, group workstations in the cafeteria |
| 17 | Self-service area: Leisure Library (FZ) |
| 18 | Self-service area: Textbook Collection I (LB) |
| 19 | Checkout: Self-service area: GE, MD, NA, SW |
| 20 | Course reserves |
| 21 | Stairs to workstations |
| 22 | Book return container |

Map

Map: (c) OpenStreetMap and contributors, CC-BY-SA
Online version in OpenStreetMap