wide-flanged girder

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Crane (machine) — A modern crawler type derrick crane with outriggers. The latticed boom is fitted with a jib. A crane is a type of machine, generally equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower material … Wikipedia
Rail tracks — are used on railways (or railroads), which, together with railroad switches (or points), guide trains without the need for steering. Tracks consist of two parallel steel rails, which are laid upon sleepers (or cross ties) that are embedded in… … Wikipedia
Monorail — For other meanings, see Monorail (disambiguation). Moscow Monorail in Russia A monorail is a rail based transportation system based on a single rail, which acts as its sole support and its guideway. The term is also used variously to describe the … Wikipedia

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