London Bridge spans the River Thames in Central London
Span 57
1223 metres
The old (1830) London Bridge is now in Lake Havasu City, Arizona.
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.
Because the original bridge was the ONLY bridge in London at that time.
the span
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.
Tower Bridge and London Bridge.