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Person on the 1837 man engine at the Samson Pit in Lower Saxony, Germany Bottom of the man engine at the Dolcoath Mine, Cornwall. The earliest known examples of this device were from the first half of the nineteenth century in the silver mining area of the Harz mountains, Germany, where they were driven by cranks connected to water wheels, although bucket hoists ("Hakenkunst") using the same ...
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.
Despite being relocated to neighboring companies, Engine 10 and Ladder 10 remained operational. Subsequently, the firehouse was reconstructed, and on November 5, 2003, "Ten House" was ceremoniously reopened. On June 10, 2006, a 6-foot-tall (1.8 m), 7,000-pound (3,200 kg) mural was unveiled on the side of "Ten House".
The tread depth of a step is measured from the edge of the nosing to the vertical riser; if the steps have no nosing, it is the same as the going; otherwise it is the going plus the extent of one nosing. The going of a step is measured from the edge of the nosing to the edge of nosing in plan view. A person using the stairs would move this ...
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Step stool with 2 steps. Step stools are halfway between a ladder and a stool, being used, as a support platform, for reaching targets that are at heights between ~2m and ~3m. The most common modern type is made with two separate ladders connected to each other at the upper end, where there is a platform with an area big enough to stand with ...