October 5, 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 current progress of the top-down construction sequence. Deep foundations, perimeter diaphragm basement walls and partial slab construction has been completed in the down sequence to complete excavation to the lowest level. The permanent foundation raft, which varies in thickness from 1.2m to 2.4m, has been completed. The up sequence is now in progress where permanent concrete columns are placed, temporary steel columns are removed (and recycled) and floor slabs are completed in areas left out in the excavation sequence.
The last photo (see below) shows an on-site visual mock-up of the building faÃ§ade wall for approval of the glass and frame aesthetics. Another full scale mock-up will be conducted off site to test the system performance related to air and water infiltration before approving the faÃ§ade panels for production.
Lastly, Mennica is scheduled to open in the third quarter of 2019.