Base Plate 2 Corner Columns
The building’s structural height reaches 110 meters above ground level, and with the helipad and rooftop structure, the total height increases to 118 meters. The north and south towers are identical, but the central tower, while having the same height, has a larger built-up area. Together, the three sections of the Millennium Tower form a regular rectangular cuboid. The building’s structural height reaches 110 meters above ground level, adf s ada nd with the helipad and rooftop structure, the total height increases to 118 meters. The north and south towers are identical, but the central tower, while having the same height, has a larger built-up area. Together, the three sections of the Millennium Tower form a regular rectangular cuboid.
Anchor Bolts
Concrete Bed Spliced Connection 1 Spliced Connection
Spliced connections in steel columns are used to extend column height while ensuring continuous load transfer. They are strategically placed at specific floor levels, often at every two to three stories, depending on construction feasibility and lifting constraints. These connections must provide strength, stiffness, and stability while accommodating potential forces like axial compression, bending moments, and shear. The Third Millennium Towers use bolted spliced connections on the ground floor for center and corner columns.
Spliced Connection 2 Spliced Beam Connection
Spliced Beam Connections are commonly used in steel structures to join two segments of an I-beam when a single, continuous beam is not feasible due to transportation or handling constraints. In the Third Millennium Towers the these connections have been adopted in the exterior cluster where as the beam extensions are welded to the column and connected to each other using high-strength ASTM A325 bolts.
Column Tree C2 Column Tree
The towers are built in nine 4-story-high structural sections. Each of these sections, also known as “stages”, represent 4-story column trees with shop-welded stub beams spaced every 3.4 meters high on each side of the tree. This method accelerates construction, ensures high precision in connections, and reduces on-site welding. These trees vary in size and beam connections depending on the column footprint, column location and stage. This diagram on the right represents a C2 column at stage 3 (floors 7-10) of the towers. The C2 columns stand along the length and width of the towers supporting beams on opposite sides of the column. The stub beams are welded to the trunk (column) of the tree using CJP and fillet welds. These welds are also reinforced with 1cm thick wedge stiffeners on the top and bottom flanges of the beams illustrated in this diagram. This ensures an even distribution of weight to the surface of the column bearing the weight of the beams. Eventually the stub beams are directly connected to the adjacent stub beams of the next C2 column tree with up to 24 A325 bolts and 8 spliced plates.
Connections
The TMT structural system is composed entirely of steel, with both the main vertical and lateral elements, as well as the floor spanning systems, constructed from cast-in-place concrete reinforced with steel. The tower’s design features a projected grid extending 100 centimeters outward, which casts shadows over customized openings on the facades. This approach exposes the building’s structural framework, integrating it into the exterior aesthetic.
