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An excavator. The bucket is raked toward the machine to create a trench or pit while the lower jaw enables logs to be moved and loaded and buildings to be dismantled. The lower jaw on this excavator makes it a particularly specialised machine. Most excavators have only the bucket fitted
Engineering vehicles, or construction equipment (sometimes referred to as earth movers), are heavy-duty vehicles, specially designed for executing civil engineering and construction tasks.
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A Combat engineering vehicle, based on a tank chassis and equipped with a bulldozer blade and a demolition gun.
In the following, the generic "Dump truck" appears several times by more technical names by "type" or appplication, such as "Highway 10 yard rear dump" or off-road varieties like "Construction & Mining Trucks".
Caterpillar D9 armoured bulldozer. Heavy bulldozers are powerful tools, equipped with a hollow steel blade, making them highly suitable for military applications and large earthmoving projects.
Heavy equipment requires specialized tires for various construction applications. While many types of equipment have continuous tracks applicable to more severe service requirements, tires are used where greater speed or mobility is required. An understanding of what equipment will be used for during the life of the tires is required for proper selection. Tire selection can have a significant impact on production and unit cost. There are three types of off-the-road tires, transport for earthmoving machines, work for slow moving earth moving machines, and load and carry for transporting as well as digging. Off-highway tires have six categories of service C compactor, E earthmover, G grader, L loader, LS log-skidder and ML mining and logging. Within these service categories are various tread types designed for use on hard-packed surface, soft surface and rock. Tires are a large expense on any construction project, careful consideration should be given to prevent excessive wear or damage.
On any project using equipment it is important to maintain accurate records concerning utilization, repairs and maintenance. The two main categories of equipment cost is ownership cost and operating cost.
Ownership Cost
For an expense to be classified as an ownership cost it must be incurred regardless of if the equipment is used or not. These costs are as follows:
Depreciation can be calculated several ways, the simplest is the straight-line method. The annual depreciation is constant, reducing the equipment value annually. The following are simple equations paraphrased from the Peurifoy & Schexnayder text:
m = some year in the future
N = equipment useful life (years)
and Dn = Annual depreciation amount
Book value (BV) in year m
example:
N = 5
purchase price = $350,000
m = 3 years from now
Operating Cost
For an expense to be classified as an operating cost it must be incurred through use of the equipment. These costs are as follows:
The biggest distinction from a cost standpoint is if a repair is classified as a major repair or a minor repair. A major repair can change the depreciable equipment value due to an extension in service life while a minor repair is normal maintenance. Major repairs are charged to the equipment and minor repairs are charged to the job. It is advantageous for projects to classify all repairs as major while the equipment department will desire to classify all repairs as "minor" and charge the work to a job.
A drilling machine at a construction site with a concrete pump and a barely visible concrete mixer-truck. The tops of foundation piles with re-inforcing iron rods sticking out, are visible at the bottom of the photo. This is an image of a very specialized auger which has a pipe all the way down its axis, permitting concrete to be pumped down while the auger is withdrawn.
Die-cast metal promotional scale models of heavy equipment are often produced for each vehicle to give to prospective customers. These are typically in 1:50 scale. The popular manufacturers of these models are Conrad and NZG in Germany, even for US vehicles.
The leading global manufacturers of construction equipment (in order):[citation needed]
Other manufacturers:
The Association of Equipment Manufacturers provides effective safety training materials for operators of rough terrain forklifts and operators of industrial and agricultural mowers.
The National Association of Heavy Equipment Training Schools provides American national certification for heavy equipment operator apprentice.
The International Union of Operating Engineers has equipment schools where apprentice operators are trained.
Currently there is not an international association of heavy equipment schools.
The International Union of Operating Engineers has equipment schools where apprentice operators are trained.
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