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Extension ladder or "telescopic ladder", a fixed ladder divided into two or more lengths for more convenient storage; the lengths can be slid together for storage or slid apart to expand the length of the ladder; a pulley system may be fitted so that the ladder can be easily extended by an operator on the ground then locked in place using the ...
In the case of a yacht, the choice of the most suitable type of boarding ladder will depend on the size of the yacht, the space available on the dock, etc. [11] There are different types of boarding stairs: [12] Telescopic boarding stairs: These ladders extend and retract as needed. They are ideal for yachts with different deck heights.
A 32M turntable ladder from the London Fire Brigade. A turntable ladder is similar in appearance to a hydraulic platform, however with a primary difference of instead of having a caged platform the turntable ladder is simply a large telescopic ladder, which can still be used to effect rescues from tall structures and pump water.
Fixed ladders consist of the following components: Rungs : all fixed ladders have rungs, dictated by OSHA Standard 1910.27(b)(1) of no more than 12" (300 mm) on center (measured as the distance from the centerline of a rung to the center line of the next rung), and at 16" (410 mm) clear width.
The ladder can achieve as many as 24 position/height permutations. The ladder folds to a smaller size for storage. The ladder also has "tip-n-glide" wheels to facilitate movement and positioning. The Ladder features flared legs for increased stability. Locking, telescoping side rails allow the various height configurations.
Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...