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  2. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. 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.

  3. Rock-climbing equipment - Wikipedia

    en.wikipedia.org/wiki/Rock-climbing_equipment

    Hooks are steel hooks of various shapes (e.g. bat hook, talon hook, grappling hook, etc.,) that are hung from cracks and flakes (e.g. the fifi hook and skyhook). They are mostly used in aid climbing but have been used in extreme traditional climbing routes as a last resort where the hook placement may not withstand a dynamic fall.

  4. Cant hook - Wikipedia

    en.wikipedia.org/wiki/Cant_hook

    A modern cant hook. A log driver using a peavey. A cant hook, pike, or hooked pike is a traditional logging tool consisting of a wooden lever handle with a movable metal hook called a dog at one end, used for handling and turning logs and cants, especially in sawmills.

  5. Glossary of climbing terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_climbing_terms

    rack A traditional climbing rack on a harness A rack A whale tail (rack) 1. Name given to the collective set of protection equipment carried by a lead climber up a climb. [1] [2] 2. A type of heavy-duty "all-weather" descender known as an "abseil rack" or a "rappel rack", consisting of metal bars on a U-shaped chassis, which is frequently used ...

  6. Fixed ladder - Wikipedia

    en.wikipedia.org/wiki/Fixed_ladder

    A fixed ladder is a vertical ladder mounted permanently to a structure. These ladders are primarily used to access roofs or other structures for industrial purposes.

  7. Pike pole - Wikipedia

    en.wikipedia.org/wiki/Pike_pole

    The head of a pike pole with various implements for pulling items The head of a short firefighter's pike pole. A pike pole is a long metal-topped wooden, aluminium or fiberglass pole used for reaching, hooking and/or pulling on another object. They are variously used in boating, construction, logging, rescue and recovery, power line maintenance ...

  8. Hook and ladder - Wikipedia

    en.wikipedia.org/wiki/Hook_and_ladder

    Hook and ladder, historical firefighting equipment—hooks and ladders; Hook-and-ladder truck, a modern firefighting apparatus; Hook and ladder (chess), or deflection sacrifice, a chess tactic; Hook and ladder (football), a type of trick play used in gridiron football, also known as a hook and lateral

  9. Ladder logic - Wikipedia

    en.wikipedia.org/wiki/Ladder_logic

    Ladder notation is best suited to control problems where only binary variables are required and where interlocking and sequencing of binary is the primary control problem. Like all parallel programming languages , the sequential order of operations may be undefined or obscure; logic race conditions are possible which may produce unexpected results.