Search results
Results from the WOW.Com Content Network
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 ...
They may also be used as counterweights in cranes such as tower cranes or swing bridges as is found in the Victoria Swing Bridge. On construction sites, prior to the erection of a building, static load testing may use a large number of kentledge stacked onto a platform.
A simple crane. A counterweight is a weight that, by applying an opposite force, provides balance and stability of a mechanical system. [1] The purpose of a counterweight is to make lifting the load faster and more efficient, which saves energy and causes less wear and tear on the lifting machine.
The crane consists of two crawler modules, a boom/jig assembly, and a large counterweight composed of containers of local materials (typically earth or gravel). [9] The crane assembly is designed to be mobile, with pinned rather than welded modular construction, so it can be broken down and transported by a fleet of trucks. Each unit costs ...
1998 – NCCCO Mobile Crane Operator certification program is nationally accredited by the National Commission for Certifying Agencies (NCCA). 1999 – The Advisory Committee on Construction Safety and Health (ACCSH) recommended that OSHA propose a new rule for cranes and derricks. 1999 – There are 110 crane-related accidents with 51 deaths. [4]
A Safe Load Indicator (SLI) or an Automatic Safe Load Indicator (ASLI) is a device which is installed on mobile or portal cranes to alert the operator if the lift is exceeding the safe operating range of the machinery. [1] In some cases, the device will physically lock the machinery in circumstances it determines to be unsafe.
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 .
The Commissioners oversee ten Exam Management Committees with the responsibility of monitoring written and practical certification examinations for mobile, tower, overhead, and articulating (loader or knuckle-boom) crane operators, digger derrick operators, drill rig operators, dedicated pile driver operators, concrete pump operators, crane ...