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This is the Jacob's ladder. While they were a popular way of boarding a vessel or carrying out shipside maintenance during the era of wooden ships, and even as recently as the 1950s, their use today on board modern merchant ships is minimal due to obvious safety issues. Today, Jacob's ladders are used only to board lifeboats and liferafts and ...
An accommodation ladder is a foldable flight of steps down a ship 's side. Accommodation ladders can be mounted parallel or perpendicular to the ship's board. If the ladder is parallel to the ship, it has to have an upper platform. Upper platforms are mostly turnable. The lower platform (or the ladder itself) hangs on a bail and can be lifted ...
Shiplift. A shiplift is a modern alternative for a slipway, a floating dry dock or a graving dry dock. A shiplift is used to dry dock and launch ships. It consists of a structural platform that is lifted and lowered exactly vertically, synchronously by a number of hoists. First, the platform is lowered underwater, then the ship is floated above ...
More heavy-duty scaffolding can require 5, 6 or even up to 8 boards width. Often an inside board is added to reduce the gap between the inner standard and the structure. The lift height, the spacing between ledgers, is 2 m, although the base lift can be up to 2.7 m.
Crane (machine) Diagram of a modern crawler crane with outriggers. The latticed boom is fitted with a jib. Manual crane from the late 19th century used for unloading small loads from ships at the Port of Barcelona, Spain. A crane is a machine used to move materials both vertically and horizontally, utilizing a system of a boom, hoist, wire ...
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