New headquarters of Archives of Wroclaw University of Science and Technology has been designed as a four-storey building with a rectangular plan with dimensions of 49.5 x 18.2m. The building has a mixed concrete and masonry structure withe going auside upper floors. Concrete structure consists of numerous deep-beams (beam-walls) wth a maximum span up to 18.9m.

The concrete slab in this building are designed with the service load bearing capacity of 12kPa. Additionally, long-time deflaction had to be limited to values needed to ensure the straightness of quideway of bookshelves mechanically moved (acceptable change of line in time is 1 mm/m). Taking into account mentioned requirements and span of one-way slas equal to 9.0m, post-tensioned slabs with unbonded tendons have been designed and realized. These were 8 post-tensioned slab panels in 4 floors. The tendon spacing was 375mm for floor slabs and 500mm for roof slabs.