July 10, 2017
Construction continues on the two-building Class A Office Mennica Legacy Tower, which will be comprised of a 35-story tower and a 10-story building located in the Central Business District of Warsaw. For this project, Epstein is serving as the architect and engineer of record, as well as the design engineer for MEP and structural engineering services (Our friends at Goettsch Partners are the design architects).
The construction of the Mennica development, due to the sites relatively high water wall and the adjacent existing subway lines, is utilizing the Slurry Wall or Diaphragm Wall technique. Tom Suarez, PE, SE, Epsteins chief structural engineer and designer of Mennicas structural system explains what can be seen in the construction progress photos featured here:
Shown is the continued progress of the top-down construction sequence. Basement levels are constructed from grade level and proceed downward using a tunneling method of excavation in combination with general mass excavation. Currently parts of the ground floor, P1 and P3 level slabs have been placed to brace the external basement walls while the mass excavation has proceeded to level P3. The concrete slabs are currently supported by temporary steel columns that were inserted from grade before excavation began. When the excavation reaches its ultimate depth at level P4 the foundation raft will be placed and permanent concrete columns will be constructed. The remaining basement levels will then be built from the bottom up.
Lastly, Mennica is scheduled to open in the third quarter of 2019.