Vertically rising ladder, designed to climb high points and facilitate suspending at said high points.Turntable ladder, an extension ladder fitted to rotating platform on top of a fire truck.Trestle ladder, an " A-Frame"-style ladder with a telescoping center section.Telescoping ladder, commonly used to refer to a hybrid between a step ladder and an extension ladder with 360-degree hinges has three parts and can be taken apart to form two step ladders e.g.Swim ladder, a ladder used by swimmers to get out of the water, often on boats.Step ladders have flat steps and a hinged back. Step ladder, a self-supporting portable ladder hinged in the middle to form an inverted V, with stays to keep the two halves at a fixed angle.Sectional ladder, also known as a builder's ladder, has sections that come apart and are interchangeable so that any number of sections can be connected.Roof ladder, a rigid ladder with a large hook at the top to grip the ridge of a pitched roof.Retractable ladder, a ladder that looks like a drainpipe but can be deployed instantly when required.Platform ladder, a step ladder with a large platform area and a top handrail for the user to hold while working on the platform.Orchard ladder, a three legged step ladder with the third leg made so that it can be inserted between tree branches for fruit picking.They sometimes have a small upper platform and a hand rail to assist in moving up and down the steps. Mobile Safety Steps are self-supporting structures that have wheels or castors making them easy to move.Hook ladder or pompier ladder, a rigid ladder with a hook at the top to grip a windowsill used by firefighters.Some variations feature a central one-way hinge with extensible locking legs. stairs), as a trestle or when fully extended a Fixed ladder. Folding ladder, a ladder in the step ladder style with one or more (usually no more than three) one-way hinges.Fixed ladder, two side members joined by several rungs affixed to structure with no moving parts.65 ft (20 m), 50 ft (15 m) and some 35 ft (10 m) extension ladders for fire service use "bangor poles", "tormentor poles" or "stay poles" to help raise, pivot, steady, extend, place, retract and lower them due to the heavy weight. 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 dogs and pawls.A system of counterweights is used to let the lower sliding part descend gently when released. Counterbalanced ladder, a fixed ladder with a lower sliding part.Christmas tree ladder, a type of boarding ladder for divers which has a single central rail and is open at the sides to allow the diver to climb the ladder while wearing swimfins.Cat ladder (US chicken ladder), a lightweight ladder frame used on steep roofs to prevent workers from sliding.May be rigid or flexible, also boarding step(s), and swim ladder. Boarding ladder, a ladder used to climb onto a vehicle.Bridge ladder, a ladder laid horizontally to act as a passage between two points separated by a drop.Attic ladder, pulled down from the ceiling to allow access to an attic or loft.Assault ladder, used in siege warfare to assist in climbing walls and crossing moats.Accommodation ladder, portable steps down the side of a ship for boarding.Rigid ladders are available in many forms, such as: The ladder is depicted as long and flexible, possibly made out of some sort of grass. The painting depicts two humans using a ladder to reach a wild honeybee nest to harvest honey. A ladder is featured in a Mesolithic rock painting that is at least 10,000 years old, depicted in the Spider Caves in Valencia, Spain. Ladders are ancient tools and technology. They are commonly made of metal, wood, or fiberglass, but they have been known to be made of tough plastic. Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top. A ladder is a vertical or inclined set of rungs or steps used for climbing or descending.
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