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Specification No. 70 Multiple Girder Cranes; Specification No. 74 Single Girder Cranes; Specification No. 78 Professional Services - This sets the standards for those who inspect, repair, design, and otherwise manage the supply and use of overhead cranes. Specification No. 79 Crane Operators Manual [3] Overhead Crane Inspection and Maintenance ...
A telescopic mobile crane with truss luffing jib. A telescopic crane has a boom that consists of a number of tubes fitted one inside the other. A hydraulic cylinder or other powered mechanism extends or retracts the tubes to increase or decrease the total length of the boom. These types of booms are often used for short term construction ...
In 1959 crane expert R.H.Neal, hydraulics specialist F.Taylor, and design director Bob Lester, integrated all three and modernized cranes. The Coles Hydra Speedcrane appeared in 1962, further modified with the 10-ton fully telescopic hydraulic boom in 1966, followed in 1968 by the 30-ton "Husky" military versions with four-wheel drive. In 1972 ...
The XGC88000 crawler crane, unlike the majority of crawler cranes, comes in two sections. The primary section consists of the crane itself, which boasts a maximum boom length of 144 meters, a maximum total length of 173 meters (including the counterweight radius), a maximum height (when fully erect) of 108 meters, a lifting capacity ranging between 3,600 and 4,000 tons [10] [11] [12] (although ...
Stothert & Pitt crane with Toplis gear. An early form of level-luffing gear was the "Toplis" design, invented by a Stothert & Pitt engineer in 1914. [2] [3] The crane jibs luffs as for a conventional crane, with the end of the jib rising and falling. The crane's hook is kept level by automatically paying out enough extra cable to compensate for ...
OSHA will begin requiring accredited crane operator certification on November 10, 2018, the final compliance date, but since the 2017 delay the NCCCO has maintained not waiting. [5] The Associated General Contractors of America (AGC) joined with members of the Coalition for Crane Operator Safety (CCOS) and urged Congress to finalize the rule.
The first telescopic handler was believed to have been manufactured by French company Sambron in 1957. In 1971, Liner Construction Equipment of Hull launched the Giraffe 4WD, 4WS telehandler based on a design by Matbro who created a similar machine based on their articulated forestry machines.
Knuckle boom crane arms are much lighter than boom truck cranes, and they are designed to allow for more payloads to be carried on the back of the truck that it is mounted on. The majority of them are mounted behind the cab and leave the entire bed of the truck empty.