A crane is a tower or derrick that is equipped with
cables and pulleys that are used to lift and lower
material. They are commonly used in the construction
industry and in the manufacturing of heavy equipment.
Cranes for construction are normally temporary
structures, either fixed to the ground or mounted
on a purpose built vehicle.
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.
Digging trenches is one of the oldest types of work
with both construction and excavating. Prior to World
War 2, trenches were dug by hand. As workers dug the
trenches deeper, the sides needed to be shored or
supported, to keep the walls of the trench from caving
in.
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 bulldozer is a very powerful crawler that is
equipped with a blade. The term bulldozer is often
used to mean any type of heavy machinery, although
the term actually refers to a tractor that is fitted
with a dozer blade.
Excavation is most commonly and best known for a
technique within the science of archaeology. The
individual types of excavation are known simply
as digs to those who participate, with this being
an over literal description of the process. An
excavation concerns itself with a specific
archaeological site or connected series of sites,
and may be carried on over a number of years, since
the work is normally seasonal.
There are many different opinions as to what
machines should actually be classified as earth
moving equipment. There are many different types
of equipment that fall in this category, such as
excavators, backhoe loaders, dump trucks, and
even loaders.
Dump trucks or production trucks are those that are
used for transporting loose material such as sand,
dirt, and gravel for construction. The typical dump
truck is equipped with a hydraulically operated open
box bed hinged at the rear, with the front being
able to be lifted up to allow the contents to fall
out on the ground at the site of delivery.