Sydney Harbour Bridge girder science practical engineering demonstration with Fischertechnik

For a quick overview watch the first minute and a half, then forward to 3:50 in and watch the next two minutes. A demonstration of the engineering within the great Sydney bridge using the Fischertechnik construction system. Google Fischertechnik for more Example , current Fischertechnik is yellow and red, the red and grey dates from the 1970 s (my childhood) but is exactly the same otherwise.