Good article about the construction of Absolute:
Increasingly complex designs, tight deadlines and higher tolerances are pushing equipment suppliers to develop more sophisticated, and more user-friendly products for the concrete construction sector.
Complex designs, be they for tower blocks or road layouts, make for challenging construction projects, and contractors are increasingly looking to equipment suppliers to help overcome not only the technical challenges they are presented with, but also demands for increased quality and fast construction cycles.
A good example of this type of partnership is the Absolute World City Center in Mississauga, Canada, where Peri has supplied its RCS climbing protection panel formwork system to the complicated build. The 170 m high south tower and 150 m north tower both twist as they climb, with constant rotation on the north tower, and varying changes between floors on the south tower, which makes for a complicated construction project.
Due to the different rotations by different degrees at different levels, Peri developed two unusual climbing methods from standard, modular components adapted to suit the project requirements and building geometry.
The 170 m Absolute Tower South has an elliptical ground plan and rotates by 208° over the course of its 56 floors, with twists of between 3° and 8° from storey to storey. During construction, Peri's RCS climbing panel completely encloses the uppermost three floors to ensure a safe environment, and the system also climbs independent of cranes, thanks to the company's hydraulic self-climbing system.
Construction of the 150 m high, 50-storey north tower began a few months after the south, and presented a slightly simpler challenge thanks to its constant 4° per floor twist. For this elliptical building, Peri designed a cost-effective variant of its RCS system.
The general contractor on the scheme is Dominus Construction from nearby Toronto, and the structural contractor, Premform Limited, is also from the same city.
Complete article (w/ other projects):
http://www.khl.com/magazines/international-construction/detail/item63680