CATBRG
- fixed bridge: a bridge having permanent
horizontal and vertical alignment. (McGraw-Hill Dictionary of Scientific and Technical
Terms, 3rd Edition, 1984)
- opening bridge: a bridge that is closed when
set for carrying road traffic and open when set to permit marine traffic to pass through
the waterway it crosses. Modern opening (movable) bridges are either bascule, vertical
lift or swing. (adapted from McGraw-Hill Encyclopaedia of Science and Technology, 7th
Edition, 1992)
- swing bridge: a movable bridge (or span
thereof) which rotates in a horizontal plane about a vertical pivot to allow the passage
of vessels. (adapted from McGraw-Hill Encyclopaedia of Science and Technology, 7th
Edition, 1992)
- lifting bridge: a movable bridge (or span
thereof) which is capable of being lifted vertically to allow vessels to pass beneath.
(adapted from IHO Dictionary, S-32, 5th Edition, 547)
- bascule bridge: a counterpoise bridge rotated
in a vertical plane about an axis at one or both ends. Also called a balance. (IHO
Dictionary, S-32, 5th Edition, 545)
- pontoon bridge: a fixed floating bridge
supported by pontoons. (McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd
Edition, 1984)
- draw bridge: a general name for bridges of
which part or the entire span of the bridge may be raised or drawn aside to allow ships to
pass through. (IHO Dictionary, S-32, 5th Edition, 546)
- transporter bridge: a bridge that has towers on
each side of the waterway connected by a girder system on which a carriage runs. (IHO
Chart Specifications, S-4, 381.2)
- foot bridge: a bridge structure used only for
pedestrian traffic. (McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd
Edition, 1984)
- viaduct: a long bridge consisting of a series
of beams, spans or girders (of steel, timber or concrete) supported on towers or piers and
used to carry a road, railroad, etc. (adapted from McGraw-Hill Encyclopaedia of Science
and Technology, 7th Edition, 1992)
- aqueduct: a bridge supporting an artificially
elevated channel, for the conveyance of water. (adapted from The New Shorter Oxford
English Dictionary, 1993)
- suspension bridge: a fixed bridge consisting
of either a roadway or a truss suspended from two or more cables which pass over towers
and are anchored by backstays to a firm foundation. (McGraw-Hill Encyclopaedia of Science
and Technology, 7th Edition, 1992)