The new Four Seasons continues to rise at the northeast corner of Bay and Yorkville Avenue. Developed by Menkes and Lifetime Developments, this aA/Page + Steele designed hotel/condo consists of a 55 and a 25 storey tower. Here a photo showing the current status.

Four Season Hotel and Residences, Toronto, Menkes, aA/Page and Steele architectsFour Seasons under construction

But let's take a look back briefly to November 2008 when the base of this complex was poured in a marathon 12 hour session. The massive base, necessary due to soil conditions, needed 500 truckloads of concrete. From MenkesVideos:

November 29, 2008. A good day for everybody. Witness a rough slab foundation pour - a 4100 meter concrete pour. This is the largest concrete pour in North America, using an ultra-fluid concrete. In a matter of twelve hours, with nearly 500 truckloads of concrete poured, everything went smoothly for this major pour.

Here's footage taken by Menkes of the pouring of the base.

Photos of the event can be found here