02/09/10

Become A Certified Crane Operator


In order to become a certified crane operator crane operator you must meet several requirements.

1. You must be at least 18 years old

2. You must pass a drug test and an ASME ANSI B30.5 physical examination,  D.O.T. and D.M.V medicals are also accepted

3. You must pass a written and practical exam administered by an accredited entity on the specific type crane you will operate.
For  telescopic boom mobile cranes the term “specific type crane” is separated into 2 categories small telescopic boom cranes and large telescopic boom cranes. Tonnage use to be the distinguishing factor between the cranes. However they are now distinguished differently the small telescopic boom crane is referred to as" fixed cab" and the large telescopic boom crane is referred to as the "swing cab." The cranes Tonnage is no longer the distinguishing factor.

As far as the written exams you will be taking 3 separate exams.
The first written exam is the core. This exam consists of a 90 question which is all multiple choice and you are given 90 minutes to complete it.
You will also be given 2, 26 question specialty exams, one on the large telescopic boom crane and one on the small telescopic boom crane these exams are also multiple choice within these exams there will be several load chart questions which you will have to calculate Net Capacities, Gross capacities, as well as some specific questions pertaining to the load charts you are given 55 minutes to complete each of these exams.

Once you have met these criteria, you are now become a nationally certified crane operator.

Many organizations do not consider you to be a fully certified crane operator until you have a crane operator certification card in your pocket. Keep in mind even after you have passed all of your crane operator certification tests it takes International Assessment Institute (IAI) the national crane operator certification testing company 2-3 weeks to mail you the results of the written tests and about 3-4 weeks to mail you the results of the national crane operator certification practical (hands on) tests. As a result of this delay your crane certification card might not come in for about 1 month after you have completed all of your national crane operator certification tests.

If you become a certified crane operator the state of Washington has some minimum hour requirements for different types of cranes.

 

20/08/10

Telescopic Cranes



Telescopic Cranes are mobile cranes whose boom consists of several square

tubes fitted inside each other. As these cranes expand, a hydraulic mechanism

extends the tubes to increase their working height.



Cranes

 

Telescopic Cranes

06/08/10

All About Crane Machine

All About Crane Machine


The crane is a construction devise comprised of an arm, a winch, and a wire rope to create mechanical advantage and lift heavy objects. The arm may be hydraulically controlled and connected to a pivot point, or may consist of a vertical mast and a horizontal boom. Many different types of cranes exist, each tailored for a specific purpose, but they all work on the same general principles, particularly leverage.
Cranes may be thought of as the oldest of heavy-equipment machines, having been invented by the Ancient Greeks for the building of temples. Those cranes, right up until the Industrial Revolution, utilized human or animal power to turn the winch or move the crane, though sometimes they could be connected to a water or wind mill. The first mechanically powered cranes utilized steam engines in the late 18th or early 19th Centuries. Modern cranes are powered by either electric or internal combustion engines, and use hydraulics to create even more lifting power.

There are many types of cranes. The one seen most obviously along the skyline is the tower crane, which has a fixed base and is constructed on site and dismantled once a project is complete. These cranes employ a counter balance on the short end of the boom, while the long end does the lifting. Because of their height and their slender base, they must be engineered to withstand forces that would cause them to tip, and are often braced by the very structure they are building. Truck mounted mobile cranes , known as boom trucks, generally employ a telescopic crane mechanism, allowing them to minimize their size for travel to and from job sites. Floating cranes are constructed upon pontoons, and are used mainly in the construction of bridges and ports, though they are sometimes also used to move awkward loads off of ships, and in salvage operations. Some floating cranes have lift capacities of 10,000 tonnes. 
Large construction companies may have several cranes among their heavy equipment. For companies which are not regularly using cranes on their projects, many industrial equipment rental stores exist.

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