MILLENNIUM TOWERS II.

Client: TRIGRÁNIT architect: Sándor Dúzs / ArkTOON /
Schön Architects
project director: József Schön
team: Tamás Havasi, Kata Heigl, Gábor Szakonyi, Eszter Tatár structure: János Volkai, Lilla D. Hetesi / TM Janeda Kft. electrical eng: Ferenc Kelemen, Zoltán Üveges /KELEVILL
mechanical/hydraulics:
Kolarovszki László, Zsebi László - KÖRÖS CONSULT Kft.
kertépítészet:
Andaházy László - PAnda Stúdió
facade engineering:
Dr. Reith András - RA-architects Kft. construction technology: Barta Ferenc, Róbert Csott, Károly Nagy, Lajos Frey
photos: Dúzs Sándor

Site considerations
As the previously approved hotel concept was no longer economical compared to the case of an office building according to the changed needs of the investment, nor does it ensure the modern, healthy use of office space. Therefore, the modified basic concept of construction is a system of "ridge" running along the two plots, as well as a system of "fingers" perpendicular to the Danube, lined up in the same rhythm. As the office tract depths and direct sun access required to work with narrower building wings than in the previous proposal (hotel) and to avoid the long connecting dark wall of the firewall, we recommended the "comb-shape" design for the configuration of the entire block.
Traffic connections
The site can be approached from all directions except the side facing to the firewall-connected 7 / B building. All the vehicular connections to the building were organized from a service road parallel to Soroksári Str, including the main entrance of the office building and the exit of the underground carpark. The entrance for the kitchen staff is located next to the driveway, as is the connection between the kitchen loading and waste collection.
Massing, floor plan arrangement
The building has three basement levels + 9 floors + a mechanical superstructure. The building's main spline is arranged along the Soroksári út, with two wings running towards the Danube. The levels are organized into two vertical traffic cores, the vertical cores are also the bracing cores of the building, each with a staircase, a main mechanical shaft, an elevator space, and three, structurally dilated towers of lifts. The staircase is anteroom-free, smoke-free.
The retaining of the side walls of the excavation pit was made with a watertight slurry wall. The slurry wall and the building structures are independent structures. There are underground garages on each of the three basement levels, with 99-97-90 parking spaces from the bottom up, for a total of 286 parking spaces. There is also a group of electrical rooms on basement level -1, and on the basement levels are the mechanical rooms related to the sprinkler system, the tank and the engine room, as well as diesel aggregates for additional operation safety.
Stuctural system
The building has an in-situ reinforced concrete column system. The raster of the load-bearing pillars is generally 8.00 x 8.00 m and 6.40 x 8.00 m, respectively. The lateral stiffness of the building is provided by reinforced concrete stairwells, as well as elevator and amenity block walls as shear-wall cores, which are made in thicknesses of 20 and 30 cm, respectively.
The slabs are flat reinforced concrete slabs with 28 cm above the 2nd and 3rd basement levels, 28 cm above the ground floor and the general levels, above the -1 basement and the 8th floor 30 cm, and 32 cm above the 7th floor. On the east-west-south sides of the building, on general levels, 15 cm thick monolithic reinforced concrete cantilevered slabs with a Schöck thermal bridge breaker were made to receive the double-layered façade. The 80 cm base slab strip was sloped 1 cm towards the outer edge.
Curtain walls
The building features three main types of glazed facade walls:
- single-glazed insulating glazing with internal, stretched, motorized blinds: The structure of the glazing is insulated glazing mounted in a 1 or 2-level high heat-bridge-free aluminum frame. In front of the thermal insulation glass, on the inside, runs a motorized roller blind that uses an aluminum curtain wall structure as a frame, with controls connected to the building management system. The vertical joints of the glass walls are typically structural on the outside, in each case guarded with lysine or ribs.
- double-skin, triple glazed"climate" façade: The difference from type I is that the shading structure is not placed on the inside but between the outer (single-layer) and inner (heat-insulating) glass shells. Thermal insulation glass panels are guarded along the edge.The vertical joint fuse glass-glass, structural connection, lysine profile will not be installed.Thanks to this, dewatering was required per glass field (min. 2 pieces).
- double-skinned, curved glass façade: The structure of the glass wall is 1 level high thermal insulation glazing mounted in a heat-free aluminum frame. The vertical joints of the glass walls are typically structural on the outside, in each case guarded with mullions or ribs.