25,000 permanent seats set into the landscape with an upper tier of 55,000 temporary seats. A sunken bowl built into the ground will contain the field of play and lower permanent seating. It has been designed
to bring spectators as close as possible to the action. Spectator access to the bowl is via a series of entrances set radially around the perimeter of the Stadium. A steel compression ring is supported
on external steel columns, with cables tensioned around an inner ring to support a fabric membrane roof cover.
The UK hosted the Olympic games in 1908 as a stand-in because Mount Vesuvius erupted -we stood in again in 1948 after World War II.
From the 27th July – 12th August 20012 7.7 million tickets will be available for what will be the greatest games ever on a site constructed on land that otherwise would probably have remained derelict for another 100 years
The word originates from the Greek word "stadion" a Greek measure of length roughly 180 – 200m. The oldest known stadium is the one in Olympia, in western Peloponnese, Greece, where the Olympic Games of antiquity were held since 776 BC.
Initially ‘the Games’ consisted of a single event, a sprint along the length of the stadium. Therefore the length of the Olympia stadium was more or less standardized as a measure of distance (approximately 190 meters or 210 yd). The practice of standardizing footrace tracks to a length of 180-200 meters (200-220 yd) was followed by the Romans as well.
Dome stadia are distinguished from conventional stadiums by their enclosing roofs. They are called stadia because they are large enough for, and designed for, what are generally considered to be outdoor sports. Those designed for what are usually indoor sports are called arenas. Some stadiums have partial roofs, and a few have even been designed to have moveable fields as part of the infrastructure.
Less than 12 months from now – bang on deadline – all the building work at the site of the XXX Olympiad Games will be complete. The Lower Lee Valley, much of which was a derelict and poisoned wasteland will be transformed into the biggest urban park to be created in Europe for over 150 years It’s 2.5 square 
(same area as 357 football pitches). There has been landscaping going on here on a gigantic scale. Since the late 19thcentury around half of the site had been used for landfill, before that a host of polluting industrial concerns left 75 per cent of the land with some level of serious contamination – petrol, oil, lead and arsenic.
Around 1. 3 million tonnes of soil has been cleaned- the polluted waterways that criss-crossed the area were restored and 52 electricity pylons had to be demolished and underground tunnels created for the 200km (the distance from London to Nottingham) length of cabling.
The Velodrome for the London
2012 Games has been
designed to create the fastest
track and the best possible
crowd atmosphere.
The 6,000-seat Velodrome
will host the indoor Olympic
and Paralympic track cycling
events in 2012 as well as
a BMX circuit for Olympic
events.
The roof design is based on
a very lightweight double
curving cable net structure.
The roof has been designed
to reflect the geometry of the
cycling track.
.