Over the past few days the Olympic Stadium has undergone a dramatic transformation. From across the Park there are now towering steel rakers that dominate the Olympic Park skyline:

The steel rakers form part of the terracing supports for the 55,000 seats of the upper tier seating. Weighing 35 tonnes each, one by one the rakers are effortlessly hoisted into position by the Stadium cranes:

Site workers are currently working on the south stand of the Stadium. Here you can see them preparing one of the 40 metre long rakers for the controlled lift above the podium level of the Stadium:

The rakers fit together to form the skeleton of the upper tier seating. This picture, taken late at the end of a wonderfully sunny day on the Park, shows that once the cranes have lifted the steel into place it is the site workers, elevated by Cherry Pickers (hoists for working at height), who secure the steel to the Stadium. A process that will be repeated on the south stand 112 times over the next nine months: