Each of the two towers on the Tower Bridge is 213 ft (65 m) high. The central span of the bridge is 200 ft (61 m) between the towers.
The main span (From anchorage to anchorage) is 2793 feet. The central span is about 480 ft.
London Bridge spans the River Thames in Central London
According to wikipedia the central span is 335 m (1100 ft).
span bridge
A bridge's span is the length that crosses the gap.
The span is the distance between supports. The sum of the span lengths is the bridge length.
I think you probably mean "bridge span" rather than "spam bridge." A bridge span is the part of the bridge between its supports.
There is no upper limit provided strong enough materials can be found and used. The longest suspension bridge is the Akashi-Kaikyō bridge in Japan at 1,991m.
its the span of a bridge for which the cost of building both substructure and superstructure is same....
A span of gap is something in a gas leak or under a bridge that smokes.
the span