This 1969 image represents a 12 -story concrete nucleus for an office building in Vancouver, Canada, which was one of the first examples of construction from top to bottom.
The steel frames on each 108 -square -meter floor mounted at the ground level and were raised in a position with steel cables inclined on concrete arches in the crown of the building.
The six sets of cables carried out the perimeter weight of the floors, which extend to 36 feet from the nucleus. The combined weight of the floors has a pretense effect on the nucleus, adding the resistance of the building to the earthquakes, a significant requirement as Vancouver is in a seismically active area.
The structural concept, developed by the engineers Bogue Batik & Associates and Architects Rhone & Iredale, both from Vancouver, saved 15% on structural costs in a conventional steel rack building.
The nucleus rises from a 56 -feet -thick 56 -feet concrete slab.
The contractor, Marwell Construction Co., used the method of sliding form, completing the nucleus of 270 feet in 21 days, less than a quarter of the time needed for conventional training.
Served as the headquarters of the Westcoast Transmission Co. Until 2000. In 2005, the building became residential use and is now called Qube.
