The footing carries the entire load of the bridge from the columns up to the foundation so that these loads can be disbursed into the soil. The foundation can be several different things including driven piles or drilled shafts.
Well with a beam it allows the bridge to support the bridge
Combined footing
get dearer
footing tie beams is to avoid differential settlements (HIBA MORTADA)
The different between suspension bridge and beam bridge are beam bridge are for short distance but suspension bridge for long distance. Beam bridge are used for highway passes and suspension bridge for wide waterway passes.
Danyang-Kunshan Grand Bridge is the longest beam bridge in the world and is approx 164.8 kilometres long.
beam and tunnel
An example of a beam bridge is Chesapeake Bay bridge-tunnel Site: http://www.pbs.org/wgbh/buildingbig/bridge/index.html
beam bridge
bottom of the beam
beam
The first beam bridge was built in America