Types Of Mobile Cranes And Their Uses

Mobile cranes are some of the most useful examples of construction equipment in use today, and they come in many shapes and forms. This article looks at various forms of mobile cranes and their uses.

Truck-mounted crane

The name of these cranes is self-explanatory; the truck the crane is mounted on allows users to move it around, and the crane can be easily transported along major roads which is an advantage as there is no need to arrange special crane transportation.

Whilst a truck-mounted crane is in use, care must be taken not to swing its load from side to side, across the direction in which it is travelling. Outriggers are put out to stabilise the crane when it is stationary, and many have counterweights for extra stabilisation.

Rough terrain crane

This type of mobile crane is mounted on a special undercarriage which has four rubber tyres, allowing it to travel easily over off-road and rough-terrain-type surfaces for pick-up-and-carry jobs. There is usually one engine which powers both the crane and the undercarriage, and the engine is usually located in the undercarriage.

All terrain crane

This types of mobile cranes can travel on public roads as well as on the job site where the terrain may be rough. Designed to lift up to 1200 tons, these cranes combine the manoeuvrability of the rough terrain crane and the ability to travel on roads of the truck-mounted crane, and they use all-wheel and crab steering on the rough terrain.

Crawler crane

These types of mobile cranes have a range of lifting potential from around 40 US tons up to around 3500 tons. A crawler crane is mounted on top of an undercarriage featuring a set of tracks or crawlers that keep it stable and allow it to move.

These cranes are very stable and travel well with loads and moves around relatively easy on site. However, they are very heavy and it can be expensive to move one from one site to another, with larger varieties having to be dismantled and transported by road, rail or even by ships.

Floating cranes

These are cranes that are mostly used in the construction of bridges and ports, and occasionally the offloading of awkward loads from ships. Cranes can be in the form of crane barges, and these are very strong with a lifting capacity of more than 10,000 tons. For this reason they can be used to transport entire sections of bridges, and they’ve been used before to salvage a ship which has sunk. Other types of mobile floating cranes are pontoon-mounted.

There are many other types of mobiles cranes; this is not a comprehensive list but a cross-section of some of the most commonly-used in the industrial world today.

The Top 5 Destinations for Travel Nurse Positions

Over the last two decades, travel nursing has become a very popular choice of careers. There are many up and coming nurses as well as existing nurses that utilize many of the different travel nursing destinations offered in the profession. However, unlike human kind, all nursing travel destinations are not equal. There are a few things to consider when looking at particular travel nursing positions, some of which revolve around compensation and destination benefits.

North Carolina
Although North Carolina is not a well-known travel destination among travelers in the US, the availability of travel nursing positions in the state makes it easy to be granted an assignment. Along with availability, North Carolina has many interesting landmarks, points of history, and one of the most beautiful coastlines on the East Coast. Compensation is above average within the state as well and reflects more urbanized salaries without the headache and hustle of large cities. With such solid attributes as great travel nurse jobs, attractive pay, and interesting activities, North Carolina rounds out the list at number five.

Arizona
Wintertime temperatures of 70 degrees can be a very tempting living condition. Arizona offers a number of travel nurse positions as well as the best of two seasons. During cold winter months, Phoenix is nice and warm while the northern territories of Winslow offer a full range of seasons including snowmobiling. Arizona offers travel nurses top pay and is within close proximity of the West Coast as well as Mexico. These attributes make Arizona a very popular destination at number four.

California
There are different degrees of compensation depending on what type of assignment one takes. Sometimes, the rate of pay is commensurate with average pay throughout the state. Therefore, states that have a high standard of living offer the best pay. Although this is not always the case, this does contribute to a destination’s desirability. For instance, nurses in California may get paid on average better than 70% of the rest of the country. California also has a number of desirable places to live and recreate. For this reason, California makes the top destination for traveling nurse positions at number three.

Hawaii
Of course Hawaii would make the top five destinations. With a 365 day steady temperature of 85 and a lush tropical environment, Hawaii is paradise in itself. Couple some of the highest pay for nurses with its environment and one couldn’t ask for a better job. The only reason Hawaii falls inline at number two is due to position availability. There are a number of positions but with a large application pool.

Southern Florida
With an annual average temperature in the mid 70s and easy access to both the Atlantic Beach as well as the Gulf of Mexico, Florida is a travel destination in itself. For this reason alone, it scores high on this top five list. However, travel nurse positions are abundant in a state where the average age is in the mid 40s, nurses are in high demand. Along with the demand, nursing pay in Florida is one of the highest in the nation. With the major city of Miami, numerous beaches on two coasts, and the only entirely tropical destination in the continental US known as the Keys, Florida is considered a travel nurse’s dream assignment and tops the list at number one.

Things To Know When Shopping For Discount Marine Gps

A Global Positioning System (GPS) has become one of the de facto must have electronic marine devices for every boat on the water. A marine GPS device provides two functions in particular that, once you get used to, you will wonder how you ever managed without.

First, marine GPS provides you essential information about where you are and how fast you are traveling. Most marine GPS units will tell you where you are within two to three meters of accuracy, how fast you are traveling and how far you are from shore.

Second, most marine GPS units allow you to set waypoints. A waypoint is a marker for where you are currently. This feature allows you to plot a navigation route through craggy rocks or difficult waters, avoiding buoys, nets and other obstacles. Multiple waypoints form a route that you can save and use as a guide for the inbound journey or re-use another time for safer and easier navigation to a favorite location. Another great benefit of setting waypoints is that you can mark significant finds whether this is an abundant fishing spot, a great scuba diving location or the position of a wreck.

By overlaying GPS waypoints with an integrated mapping tool or chart plotter, a marine GPS can give you a very precise picture of where you have been, where you are, where you want to go and what lies in your path.

Ultra-precise GPS marine electronics include the addition of signals from the Wide Area Augmentation System (WAAS). WAAS is program that was developed the Federal Aviation Administration to correct GPS errors. Satellites travel on an elliptical path in orbit around the earth. The calculations used to determine where you are depend also on knowing exactly where the GPS satellites are. The orbital path of a satellite is disrupted by a score of natural phenomena, including space weather, the gravitational pull from the Earth and other factors. WAAS performs corrections for these factors, increasing the accuracy of the GPS signals that your GPS receiver processes.

If your marine GPS is WAAS enabled (and most are these days) then you will benefit from this improved accuracy without doing a thing. You dont have to configure it or subscribe to it. However, it is only available in North America; so if you are sailing outside the US waters just know that the accuracy of your marine GPS may dip from better than three to less than seven meters and possibly to less than fifteen meters. WAAS is a good feature to look for when shopping for discount marine GPS.

WAAS enabled marine GPS can be mounted (fixed position) or portable (hand-held) systems. Hand-helds are useful if you leave the boat to visit a local hotspot on dry land, explore an island or simply find where you left your boat in a large and unfamiliar marina. If you do intend to use your portable marine GPS on dry land, then it is definitely worth paying more for one that comes with built-in maps because following a compass point that is plotted as a straight line is not easy on land, especially in urban areas or over mountainous terrain.