Drag line excavator systems are heavy machinery that
is used in civil engineering, surface mining, and
excavation. With civil engineering, the smaller
types are used for road and port construction. The
larger types of drag line excavators are used in
strip mining operations to extract coal. These are
among the largest types of mobile equipment and
weigh upwards of 10,000 tons!

The drag line excavator bucket system consists of
a large bucket that is suspended from a boom. The
bucket is moved by a number of chains and ropes. The
hoisting rope, which is powered by either a large
diesel or electric motor, will support the bucket
and hoist coupler assembly from the boom. The
drag rope on the assembly is used to draw the bucket
assembly horizontally. Through skillful maneuvering
of the hoist and drag rope, the bucket can be
controlled for many different types of operations.

Operation
With a typical excavation cycle, the bucket is
positioned high above the material that is being
excavated. The bucket is then lowered down and the
drag rope is drawn so that the bucket is dragged
along the materials surface. Using the hoist rope,
the bucket is then lifted. A swing operation is
then performed in order to move the bucket to the
place where the material is going to be dropped.
The drag rope is then released which will cause the
bucket to tilt, making the material in the bucket
fall down, which is commonly known as a dump operation.

With smaller drag line excavators, the bucket is
thrown by winding up the jib then releasing a
clutch on the drag cable, which swings the bucket
like a pendulum. Skillful operators can make the
bucket land about 1/2 the length of the jib further
away than if it had just been spun or dropped.

Limitations
The limitations of drag line excavators are the
height and length of their boom, as this limits
where the drag line can dump waste material. Being
inherent with their construction, the drag line
is most effective when excavating material
below the level of their tracks. Drag lines
aren’t suitable for loading piled up material.

Despite their limitations and high capital cost,
drag line excavators remain very popular with
several mines, due to their very low waste removal
cost, performance, and reliability.

They also have different cutting sequences. The
first is the side casting method which uses
offest benches. This method involves throwing
the overburden sideways onto blasted material to
make a bench.

The second method is a key pass. This pass will
cut a key at the toe of the new highwall and will
also shift the bench further towards the low
wall. This can also require a chopping pass if the
wall is blocky. A chopping pass will involve
the bucket being dropped down onto an angled
highwall to scale the surface.

The next method is the slowest, known as the
blocks pass. This method will however, move the
most material. The blocks pass involves using
the key to access the bottom of the material to
lift it up to spoil or to an elevated bench
level. If required, the final cut is a pull
back, which pulls the material back further to
the low wall side.

For construction, mining, or excavation, drag line
excavators are great to have. They can move even
the biggest of material, which is great for deep
holes in the ground. If you’ve been looking for a
great way to maximize mining or excavation productivity,
the drag line excavator is just what you need.

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Let’s say that you live in a one bedroom apartment and you have guests sleeping over. You can give up bedroom and sleep on the couch but if this is going to be the scenario every time, perhaps it will be best to turn the attic into another bedroom instead?

The attic will make a nice bedroom because it is above ground. Not only that, a study shows that homeowners who convert their attics or add additional living space to their homes can carry a significant weight at the time that they decide to resell it.

To make this happen, the first thing you have to do is improve the insulation in the room. Most people do not insulate this section of the house compared to the bedroom or dining room because this is only used to store old junk

In order for people to sleep here comfortably, you will need to install additional layers of insulation as well as a drywall to hide the wooden frames.

It is one thing to fight against the cold and another when summer is here. For that, you will also need to provide adequate ventilation by putting roof rafters and windows so air can flow in and out of the room.

Next, you will have to fix the walls by using either drywall pieces or wood paneling. Choosing what to use really depends on your budget.

Since most attics are dark, you will have to light to this place by installing a skylight. You can put one or a few which will also save on electricity costs when someone is up here during the day.

After roofing and walls, you can now focus your attention on the floors. You can use the existing wood already on the floor or replace these with tiles. Another option will be to put a rug.

If a pull down stairway or trap door is okay to gain access to your attic, this should also be changed when what is already up there is already a bedroom. This is because it is a requirement in order for your construction to be approved. The staircase must be 2 feet by 6 feet with single or double hand railing.

As for lighting, you can easily put a few more bulbs by wiring this to the nearest power source. The same goes for heating and plumbing should you also have a bathroom upstairs.

Homeowners who decide to hire a contractor should look for several, ask for an estimate and compare each one. As much as people want to spend so much to make this renovation look good, there are limits to how much he or she can shell out to make this happen.

Those who have the right contractor for the job should make sure that the building permit and other requirements are in order so construction can begin. They should also be able to keep you updated on the progress of their work and be consulted if there are any problems because this is your home.

Turning your attic into a bedroom is one of the best decisions you will ever make as a homeowner because when everything is made according to your specifications, you will already be able to have guests come over and sleep there without you ever having to give up your bed.

Both of these machines are affordable, popular,
highly productive, and they both have helped lay a
lot of cable and pipe in the ground. While they
both can do the work, there are differences as
to how they perform when stacked up against each
other in residential utility installations.

Size and price
The average dig depth for utility installations in
residential applications is between 40 and 48
inches. The basic trencher that digs to the above
depth will boast a 20 – 30 horsepower engine and
cost around 40,000 dollars.

The most popular type of compact excavator is the
2.5 metric ton size class, and it uses a 30 HP
engine and costs around the same price. The
biggest difference in the two surfaces when you
need the trencher to dig deeper. The 2.5 metric
ton excavator has no trouble at all digging to 8
feet or more, although a trencher that can dig
that deep will require an engine with around 100
horsepower and cost upwards of 90,000 dollars!

Life costs
Not counting the bucket teeth and the replacement
of the rubber tracks at 2,000 hours, fuel and
routine maintenance are your only daily costs
with a compact excavator. The digging chain, teeth,
and sprockets on the trenchers are considered
wear items and need to be replaced often. Even
with the high consumable costs of trenchers, the
differences will tend to even out when productivity
is taken into effect.

Productivity
For straight line trenching at an average depth,
trenchers will flat out lead compact excavators.
Under reasonable conditions, a trencher can work
three to four times faster than that of a compact
excavator. Another area where trenchers really
excel is wooded areas, where tree roots and logs
can make for slow and sloppy digging when using a
bucket.

Versatility
When it comes down to it, compact excavators can
do a lot of things that trenchers can’t, especially
when they have attachments on hand. If you are
digging with a compact excavator, you can’t go
anywhere near as fast as you can with a good quality
trencher.

Keep in mind that a trencher isn’t a single minded
machine either. Most styles of trenchers can be
outfitted with a backhoe attachment that attaches
to the front end. Whenever concrete, rocks, or
asphalt stands in the way, the boom and chain can
be replaced with rock teeth and a wheel. In soft
soils, you can set up a trencher with a plow
attachment and plow in cables faster than using
any other available method.

When it comes down to choosing, keep in mind that
it all depends on your needs. There are some
cases where the compact excavator is best to
choose, while there will also be jobs in which
the trencher is going to do the best work.

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A skid steer loader with backhoe attachment or a backhoe
loader in general can be very productive if it is
operated safely and efficiently. The best way to
get the job done safely and efficiently is to know
yourself, the job site, and your equipment.

Even though the models of backhoes will vary, there
are safety features with all of them that include
steps and grab handles for getting on and off of
the machine. Backhoes also feature frame lock levers
and attaching levers to keep the backhoe securely
fastened to the loader frame during operation as well
as transporting.

In addition to these standard safety features, there
are some backhoes that provide a safety chain. The
safety chain will prevent the backhoe mounting
frame from rotating backwards and unexpectedly
trapping the operator, which can result in serious
injury or death. Therefore, it is always important
to know and check all of the mounting and attachment
points and the safety chain before you operate the
backhoe.

If you’ve attached the backhoe to the loader, you
should take a moment to inspect it and perform any
necessary maintenance. Check for broken or
damaged parts, also making sure to check for leaks,
cracks, excessive wear, and check the control
levers.

The warning and safety signs and instructional
decals are very important and will help you to
avoid injury. You should always take them seriously
and replace any damaged or missing decals.

Every 8 hours or so, you should grease all of the
zerk fittings, and check the hydraulic fluid
and oil and a daily basis. If the fluid is low,
the backhoe will not operate. Therefore, you
should always take the time to check your machine.

Anytime you have to leave the operator seat of the
backhoe, you should lower the bucket or attachment
to the ground, turn the engine off, remove the
ignition key, then exit the machine.

When the time comes to drive to the next job site,
you should always make sure that you have fully
raised both the front and rear stabilizers and
make sure you’ve put the backhoe seat into the
“down” position for better visibility. Before
you drive off, make sure that you’ve installed the
transport locking pin.

Here are some other things to keep in mind:
- Always select the right size bucket for
the job.
- Stake out the work area that is going to
be excavated and use flags to mark the area.
- Never work in areas that have inadequate
overhead clearances.

Always make sure that you keep bystanders or other
workers out of the swing area. If anyone gets in
the way of the boom swinging, they can very easily
get injured. The machine has no feelings,
therefore you should always be aware of who is
around you and where they are standing.

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What is more complicated? Building a house or renovating? If this is planned properly, you will be able to succeed in both. Aside from that, here are a few other things you will need to make sure everything goes smoothly.

First, you have to now what you want to happen to the attic? You must have an idea of what will this be converted into. Do you want to make this into a extra bedroom, a playroom for the kids, a gym or an office? When you have figured that out, it will already be easy to get the right tools and equipment.

A renovation should not cost you an arm and a leg. To prevent this happening, another thing you have to think about is your budget. Naturally, homeowners who are able to do it themselves will be able to save hundreds of dollars. If you are stumped by a small problem, try looking for information about this online or on television since there are shows that can teach you a thing or two so you can carry on with your work.

But if you are inexperienced and you want this done right, it is best to hire a professional. Just remember that hiring someone who does this for living will cost money.

You can try and save some dollars by canvassing around and calling up different contractors. Is the cheapest contractor the solution? No because if they are just starting out, you are not sure if they can do a good job or not.

So, you don’t make the mistake of hiring the wrong contractor. Your decision on who to get should not be based on how much they are quoting but rather on their experience in this line of work.

You should call up their previous customers and ask questions. If you are satisfied with your background check, then you can consider them as someone you can hire for the renovation.

But going back to the issue of your budget, if the contractor is asking a certain price and it has exceeded your budget, the best thing for you to do will be to find ways to save money. You can do so by installing cheaper but still durable appliances, recycle some of furniture in the room by repainting it so they look once again or have the work done in phases. This may take longer than what you anticipated but at least you are working within your limits.

If you stick to the plan and your budget, you will be able to complete the renovation of your attic. Unfortunately, there are many people who do not plan ahead, shop wisely or hire the wrong contractor end up with an incomplete project.

Surely, you don’t want to happen to your attic or any room in your house. So, before you do anything, think about what you want to turn the attic into and get ideas from interior design magazines or online. Some people follow exactly what they see while others make some slight modifications.

There is no right or wrong answer when it comes to attic renovations. The important thing is that it you are happy as it shows your personality so forget what other people say and just go for it.

Caterpillar Incorporated, also known as CAT is a
United States based corporation that is based in
Peoria, Illinois. The company commonly known as CAT
is known around the world as the largest manufacturer
of construction and mining equipment, diesel and
natural gas engines, and industrial gas turbines.

Well known and famous for their products that feature
the Caterpillar track and distinctive yellow paint,
CAT produces a wide range of heavy equipment for
all types of jobs, including the very popular
Caterpillar D9 bulldozer.

History
The story of CAT dates back to the late 19th century,
when Daniel Best and Benjamin Holt were experimenting
with different ways to fulfill the promise that
steam tractors held for farm work. Prior to 1925,
the Holt family had pioneered track tractors and
gasoline powered engines. After the companies of
Best and Holt were merged, the company went through
several changes then at the end of World War 2,
they began to grow at a very fast pace, launching
the first venture outside of the country in 1950,
which marked the beginning of CAT development into
a big corporation.

CAT equipment ranges from track type tractors to
hydraulic excavators, backhoes, motor graders, off
road trucks, wheel loaders, tractors, diesel and
gas engines, and gas turbines. CAT equipment is
used in construction, excavation, building roads,
mining, energy, forestry, transportation, and
material handling companies.

Sales
Over half of CAT’s sales are to customers in overseas
areas. CAT products are sold in almost 200 different
countries. The company has a worldwide network
of over 200 dealers – 63 in the United States and
over 150 in other countries. CAT equipment and
components are manufactured in 42 plants in the
United States and 58 plants in Australia, Belgium,
Brazil, Canada, England, France, Germany, India,
Japan, Mexico, and several other countries.

Labor
CAT almost went down in the early 1980s due to
the massive union strikes and a down turn in product
demand. At the time, several news reports indicated
that products were piling up so high in facilities
that temporary workers hired to work the lines
could barely get to their stations to perform their
jobs.

In the 1990s, CAT suffered yet another long strike
in which the company hired what it deemed to be
permanent replacements for union workers that
were on strike. During both strikes, jack rocks
were placed in the home entrances of many of
CATs top executives and employees, puncturing
the tires of their vehicles and making things
worse for the company.

Not long after the strike of the 1990s ended
and the economy started to get back up again, CAT
adopted the “6 Sigma” quality management program,
to help reduce costs and inventory and identify
and correct the defects in processes and products.

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The compact hydraulic excavator can be a tracked or
wheeled vehicle with an approximate operating weight
of 13,300 pounds. Normally, it includes a standard
backfill blade and features an independent boom
swing. The compact hydraulic excavator is also
known as a mini excavator.

A compact hydraulic excavator is different from other
types of heavy machinery in the sense that all
movement and functions of the machine are accomplished
through the transfer of hydraulic fluid. The work
group and blade are activated by hydraulic fluid
acting upon hydraulic cylinders. The rotation and
travel functions are also activated by hydraulic
fluid powering hydraulic motors.

Most types of compact hydraulic excavators have
three assemblies – house, undercarriage, and the
work group.

House
The house structure contains the compartment for
the operator, engine compartment, hydraulic pump
and also the distribution components. The house
structure is attached to the top of the undercarriage
via swing bearing. Along with the work group, the
house is able to rotate upon the undercarriage
without limit due to a hydraulic distribution valve
that supplies oil to the undercarriage components.

undercarriage
The undercarriage of compact excavators consists of
rubber or steel tracks, drive sprockets, rollers,
idlers, and associated components and structures.
The undercarriage is also home to the house
structure and the work group.

Work group
The work group consists of the boom, dipper or
arm, and attachment. It is connected to the front
of the house structure via a swinging frame that
allows the work group to be hydraulically pivoted
left or right in order to achieve offset digging
for trenching parallel with the tracks.

Independent boom swing
The purpose of the boom swing is for offset
digging around obstacles or along foundations,
walls, and forms. Another use is for cycling in
areas that are too narrow for cab rotation. Another
major advantage of the compact excavator is the
independent boom swing.

Backfill blade
The backfill blade on compact excavators are used
for grading, leveling, backfilling, trenching,
and general dozer work. The blade can also be
used to increase the dumping height and digging
depth depending on it’s position in relation to
the workgroup.

The most common place you’ll find compact excavators
is in residential dwellings. When digging phone
lines or other things, these pieces of equipment
are very common for getting between houses. Due
to their small size, they can fit almost anywhere.

Over the years, the capabilities for compact
excavators have expanded far beyond the tasks of
excavation. With hydraulic powered attachments
such as breakers, clamps, compactors and augers,
the compact excavator is used with many other
applications and serves as an effective attachment
tool as well. Serving many purposes, the compact
excavator is a great addition to any job that
requires the use of machinery.

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Everybody has a dream house, but people can’t help it that if they already have one, they want to keep it changing or modified. Change is good because this will not only improve your house appearance but will also strengthen it in the process. If you plan to have a do-it-yourself attic renovation, here are some notes to check out that might help you decide what and what not to do.

Attic Renovation might be the answer for homeowners who want extra space in the house to be used as rooms and utilize its function. But one cannot just go on with the modifications without looking at the project at every angle.

The Space and Framing
These are vital elements to your attic modification plan. You must first know how much space will be available once the desired change is done in the place and if that space fits what’s required by your local codes.

Rafters should be used as the framing for your roof and not trusses because the latter wouldn’t allow enough space for you to pursue with what you have in mind. If your attic is the type that is open, the roof should have braces that are either cross or tie for support. This will also be great to be used as installation for ceiling fans for added ventilation.

Accessibility
You should also refer to your local building codes about the required number of exits, windows and entrances to the attic are permitted. In most cases, one outdoor exit is enough, but the room has to get enough air through the windows and proper lighting.

The Headroom
This is the first measurement that should be considered when deciding on modifying your attic into a functional room. Make sure that people are able to stand and move freely in the space or else it will be uncomfortable, unsafe and not fit for everyone. Again, building codes has reference regarding the matter and one has to abide by such.

The Overall Look
If you decide on renovating the attic, consider each and every part of the house. Decide on depending how the modification will affect each. You should let a professional see your home to make sure if you can proceed with the project. One should always think of safety before pursuing with any plan.

So before you can change the attic, you have to strengthen the foundation first. See if the first floor has any cracks or leaks that may contribute to the sturdiness of the overall construction. See if it is safe to add electrical elements from the main floor up to the attic and study the safest way it could be done.

Anything that may contribute to the success of the plan should be looked at. You may even ask the help of building inspectors to be sure with what you’re doing. In the end, you will benefit from all these because your money wouldn’t be wasted and you’ll have an additional space in the house that is fully functional.

The most important thing to remember when you want a do-it-yourself attic renovation is to research on all the things that you have to know about before even drawing out a plan.

Read through books about design, browse though the local code requirements for safety and assurance and search the Web for practical ideas on how to go about it.

The D-11 from Caterpillar is among the series of
tracked type tractors are among the largest
conventional bulldozers in the world, second to the
Komatsu D575. It comes in two variations, the
standard D-11R and the bigger and heavier D-11R CD.

The D-11 bulldozer is among the upper end of
Caterpillars track type tractors, which range in
power and size from the D-3 (77 HP) to the D-11R
(935 HP).

The primary use for the D-11 is for moving large
quantities of rock, dirt, etc. short distances in
confined spaces. The D-11 is often times used in
quarries. The price, size, power and weight of
the D11 dictate that they are used primarily for
major products. You can normally find the D11
used in forestry, mining, excavation, and quarry
operations.

The D-11 is high known and favored for its amazing
power and ability to rip into the earth, making
them ideal for agricultural and rock ripping type
work. The ripper is the long claw like device
you can find on the back of the D-11. Rippers come
in single shank or in groups of two or more, known
as multi shank rippers. Normally, a single shank
is all you need for heavy ripping work.

The ripping of rock will allow the ground surface
rock to be broken up into small, easy to handle
and transport rubble which can then be removed
so that you can grade the area.

The agricultural ripping feature will allow rocky
or very hard ground to be broken up so that
otherwise unarable land can be put to use with
agricultural applications.

The blade on the front of the D-11 comes in 3
varieties:
1. A straight blade which is short and
has no lateral curve, no side wings, and is ideal
for fine grading.
2. A universal blade which is tall and
very curved, and has large side wings which can
carry more material.
3. A combination blade that is shorter,
has less curvature, and smaller wings on the side.

The nearest competition for the Caterpillar D-11
is the Komatsu D-475. The Caterpillar can best be
distinguished from the Komatsu by the elevated drive
sprocket or high drive system that results in a
triangular, rather than oval, shaped caterpillar
track.

The D-11 is a fine testament to the superb products
Caterpillar offers. They are great for excavation
and clearing dirt, as they can push large piles
of dirt. They are also good for rock, as they can
move even the biggest of rocks from the ground
without breaking a sweat. If you’ve wanted a
bulldozer with uncanny strength and abilities, the
D-11 is just what you need on your job site.

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Do you have an attic at home? If you do and want to convert it into something else, there are many ways to do this. You just have to figure out what you want that is according to your own personal taste.

For instance, if you live in a two bedroom home and you know that this is not enough to accommodate some guests that will be staying for a few days, why not turn the attic into an extra bedroom? Curtains and linen should be made of soft fabric materials to create a nice atmosphere. The same goes for the paint used on the walls. Don’t forget to put small dresser with a mirror.

Another decorating idea for the attic is to convert this into a children’s playroom. For that, you will need a soft carpet and of course, lots of toys. You should put washable paint on the walls so it is easy to remove the kids drawings!

If you love to draw or paint, then perhaps you can turn the attic into a studio. Naturally, you must have a place to keep all your supplies like your paints, brushes and canvas. You will also need to put a couch so guests will be able to come up and see your work or you can use this to simply sit down and take a break.

The attic can also be turned into a gym. You can put all sorts of machines in here as well as a refrigerator so you can easily get something cold to drink during your workout. If there is still space, you can even put a shower room so you can hit the showers right after instead of going downstairs.

There are so many decorating ideas which you can do with your attic. You will realize that it is much better as living space compared to storage space.

But before you get excited, you have to check if the ceiling and the roofing can handle the headroom and the additional weight. If you fail to do so, all the equipment you have up there could come crashing down damaging the other rooms of the house.

You will also need to do some carpentry, electrical, insulating, plumbing and ventilation work to make this place feel cozy during any time of the day.

Some of the work can be done without any help. But for the skilled stuff, you will have to hire a contractor who has the experience and know how to get the job done.

It is best to call several, ask them a few questions and then get their estimate. There are even some contractors who offer their services online so this is another venue for you to check out. Before you sign anything, make sure to read the contract first because you don’t want to pay for additional charges.

Decorating ideas for the attic can be found in magazines, online and in the homes of your neighbors. So, pay attention to these details and see which you can incorporate in your attic. These concepts will surely add great value to your home so you can sell it at a higher price than what you originally paid for it how many years ago.