Through arch bridge Arch bridge
cotter bridge, through arch bridge has open spandrels
this type of bridge has arch base @ or below deck, top rises above it, deck passes through arch. central part of deck supported arch via suspension cables or tie bars, tied-arch bridge. ends of bridge may supported below, deck arch bridge. part supported arch below may have spandrels closed or open.
the sydney harbour bridge through arch bridge uses truss type arch.
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