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Ladders
A ladder is a Vertical direction, vertical or inclined set of rungs or Step (footing), 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. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. They are commonly made of metal, wood, or fiberglass, but they have been known to be made of tough plastic. Historical usages Ladders are ancient tools and technology. A ladder is featured in a Mesolithic rock painting that is at least 10,000 years old, depicted in the Cuevas de la Araña, Spider Caves in Valencia, Spain. The painting depicts two humans using a ladder to reach a wild honeybee nest to harvest honey. The ladder is de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ladder Aluminum
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. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. They are commonly made of metal, wood, or fiberglass, but they have been known to be made of tough plastic. Historical usages Ladders are ancient tools and technology. 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. The painting depicts two humans using a ladder to reach a wild honeybee nest to harvest honey. The ladder is depicted as long and flexible, possibly made out of som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. In the United States, these ladders are covered by OSHA and ANSI standards. Components Fixed ladders consist of the following components: * Rungs: all fixed ladders have rungs, dictated by OSHA Standar1910.27(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. * Side members: These are the rails on the side of the ladder that are designed that the foot cannot slip off the end. Mostly flat bar or angle profile and sometimes channel. * Stand-off brackets: Dictated by OSHA Standar1910.27(c)(4)stand-off brackets must be at least 7" (180 mm) longer than the farthest obstruction for clearance on the back side of ladder. This means that if there is a 4" (100 mm) gutter projecting from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assault Ladder
Escalade is the act of scaling defensive walls or ramparts with the aid of ladders. Escalade was a prominent feature of sieges in ancient and medieval warfare. Although no longer common in modern warfare, escalade technologies are still developed and used in certain tactical applications. Overview Escalade consists of attacking soldiers advancing to the base of a wall, setting ladders, and climbing to engage the defending forces. Though very simple and direct, it was also one of the most dangerous options available; escalade would generally be conducted in the face of arrow fire from the battlements, and the defenders would naturally attempt to push ladders away from the wall. Heated or incendiary substances such as boiling water, heated sand, and pitch-coated missiles were sometimes poured on attacking soldiers. This made it difficult for attackers to reach the top of the wall, and those that did would often quickly be overwhelmed by the defenders on the walls, only bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Safety Steps
Mobile safety steps, sometimes called warehouse steps, are mobile structures with steps up to a platform. The steps use wheels or casters, making them easy to move. They have the advantage over standard ladders in that the operative can have one hand free when moving up and down the steps and both hands free if there is a top-level platform. Variations On smaller steps (between 2 and 6 steps) there will be a handrail and castors which retract when weight is applied, making them stable. They are often used in schools, offices, hospitals, stores and libraries. If they are between 4 and 15 steps they will often be configured to have a top platform (on what would be the final step), and will have surrounding handrails – this style of safety step can be used at a maximum working height of 5 metres. Because they are very sturdy and easy to move, they have a wide variety of uses – for example, in a warehouse (for safe order picking) DIY Hardware store and various types of factorie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pompier Ladder
A hook ladder, also known as a pompier ladder (from the French language, French ''pompier'' meaning firefighter), is a type of ladder that can be attached to a window sill or similar ledge by the use of a hooked extending bill with serrations on the underside. The hooked ladder then hangs suspended vertically down the face of the building. The ladder was developed to access buildings via enclosed alleys, lightwells and yards to which other types of ladder could not be taken. A pair of men and two ladders could be used to scale a building to considerable heights, by climbing from floor to floor and taking the ladders up behind and pitching to the next floor. The original French design was a single beam ladder with pairs of rungs projected outward on both sides of the beam. The British version was a conventional two-string ash ladder around long and wide. Hook ladders can be used to scale from floor to floor on multi-storey buildings by way of exterior windows. The ladders hook on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hook Ladder
A hook ladder, also known as a pompier ladder (from the French ''pompier'' meaning firefighter A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical in ...), is a type of ladder that can be attached to a window sill or similar ledge by the use of a hooked extending bill with serrations on the underside. The hooked ladder then hangs suspended vertically down the face of the building. The ladder was developed to access buildings via enclosed alleys, lightwells and yards to which other types of ladder could not be taken. A pair of men and two ladders could be used to scale a building to considerable heights, by climbing from floor to floor and taking the ladders up behind and pitching to the next floor. The original French design was a single beam ladder with pairs of rungs projected outward o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attic Ladder
An attic ladder (US) or loft ladder (UK) is a retractable ladder that is installed into an attic door/access panel. They are used as an inexpensive and compact alternative to having a stairway that ascends to the attic of a building. They are useful in areas with space constraints that would hinder the installation of a standard staircase. Attic ladders typically consist of a ladder with wider steps and a steep slope. A drawstring will hang down to allow the ladder to be manually extended. Attic ladders are usually made of wood, metal, aluminum, or fiberglass. Also, fire departments carry attic ladders on fire apparatus for use to locate and extinguish fires in attic spaces. They are in a single ladder that is often used by firefighter A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wing Enterprises
Wing Enterprises is an American company headquartered in Springville, Utah company, the largest American manufacturer of ladders as of 2005. The company produces the ''Little Giant Ladder System'', a convertible aluminium ladder system. The founder of Wing Enterprises, Harold Ray "Hal" Wing, came across a prototype of the ladder in Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ... in the 1970s. He licensed the ladder from the inventor, patented the design in the United States and began manufacturing the ladder in his home and selling it at trade shows. Features The ladder itself is capable of being converted into several heights and configurations from a single ladder. Configurations include a straight or extension ladder, an A-frame ladder, a staircase ladder (an unev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Step (footing)
Stairs are a structure designed to bridge a large vertical direction, vertical distance between lower and higher levels by dividing it into smaller vertical distances. This is achieved as a diagonal series of horizontal platforms called steps which enable passage to the other level by Walking, stepping from one to another step in turn. Steps are very typically rectangular. Stairs may be straight, curved, or may consist of two or more straight pieces connected at angles. Types of stairs include staircases (also called stairways) and escalators. Some alternatives to stairs are elevators (also called lifts), stairlifts, inclined moving walkways, ladders, and ramps. A stairwell is a vertical shaft or opening that contains a staircase. A flight (of stairs) is an inclined part of a staircase consisting of steps (and their lateral supports if supports are separate from steps). History ''This is an excerpt from Staircase.'' The concept of stairs is believed to be 8000 years old, and is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
