5. The biggest difference between
the three bridge types is the
distances they can each cross in
a single span.
A span is the distance
between two bridge supports.
6. Beam bridges usually coverBeam bridges usually cover
relatively short distances.relatively short distances.
7. As beam bridges are lengthened, theyAs beam bridges are lengthened, they
need more supporting piers.need more supporting piers.
But adding piers makes themBut adding piers makes them
unsuitable if a lot of space is neededunsuitable if a lot of space is needed
underneath them.underneath them.
16. The angled piers of this beam bridge
transfer its loads to the ground.
17. AA Cantilever BeamCantilever Beam bridgebridge
has triangular structureshas triangular structures
that weigh down each endthat weigh down each end
of the beams.of the beams.