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Heavy equipment

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(Redirected from Engineering Vehicles)
"Heavy machinery" redirects here. For other uses, see Heavy machinery (disambiguation).
"Earthmover" redirects here. For other uses, see Earthmover (disambiguation).
Heavy equipment vehicles of various types parked near a highway construction site

Heavy equipment, heavy machinery, earthmovers, construction vehicles, or construction equipment, refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. Heavy equipment usually comprises five equipment systems: the implement, traction, structure, power train, and control/information.

Heavy equipment has been used since at least the 1st century BC, when the ancient Roman engineer Vitruvius described a crane powered by human or animal labor in De architectura.

Heavy equipment functions through the mechanical advantage of a simple machine that multiplies the ratio between input force applied and force exerted, easing and speeding tasks which often could otherwise take hundreds of people and many weeks' labor. Some such equipment uses hydraulic drives as a primary source of motion.

The word plant, in this context, has come to mean any type of industrial equipment, including mobile equipment (e.g. in the same sense as powerplant). However, plant originally meant "structure" or "establishment" – usually in the sense of factory or warehouse premises; as such, it was used in contradistinction to movable machinery, often in the phrase "plant and equipment".

Innovations and new technologies

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The design of heavy equipment has increasingly incorporated modern electronics and software, a process known as Fleet digitalization. This integration of technology facilitates greater automation, safety monitoring, and operational efficiency on construction and mining sites, creating what is often referred to as an intelligent job site.

Fleet telematics and monitoring

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Fleet telematics systems are utilized for the Fleet management of heavy equipment. A ruggedized Telematic control unit, installed on each asset, uses a GPS tracking unit to provide real-time Vehicle location data. In addition to location, the system transmits a wide range of telemetry data, including engine hours, fuel consumption, idle time, and diagnostic fault codes.[1] This data is used for operational oversight, such as to track asset utilization, schedule predictive maintenance, and manage fuel with Fuel-management systems. Studies in the construction industry have correlated the use of such systems with improvements in overall project efficiency.[2] A primary function of these platforms is to address the challenge of aggregating data from a mixed fleet of equipment from various manufacturers into a single, unified interface.[3]

Autonomy and robotics

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Research and development in heavy equipment has increasingly focused on robotics and autonomous operation. Several manufacturers have commercialized autonomous systems that allow machines like haul trucks and dozers to operate without a human driver by following pre-programmed routes from a digital site plan.[4] Such applications are most prevalent in mining and large-scale earthwork operations where tasks are repetitive and occur in controlled environments. Semi-autonomous features, such as grade control and automated digging cycles on excavators, are also becoming common, assisting operators in performing tasks with greater speed and precision.

Operator safety and assistance

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Technology is applied to improve operator safety and situational awareness. Video telematics systems, which utilize multiple ruggedized cameras, offer operators a comprehensive view of their surroundings to mitigate blind spots. These systems also record operational data for incident analysis. Operator scoring applications analyze telemetry data to identify potentially hazardous operating practices, such as excessive speed or abrupt movements, providing a basis for targeted safety training. Advanced driver-assistance systems (ADAS) are also being adapted for heavy equipment, with features like object detection and collision avoidance alerts to protect both the operator and ground personnel.

Electrification

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The development of electric and hybrid-electric powertrains is an area of ongoing development in heavy equipment manufacturing. Several manufacturers, including Caterpillar,[5] Volvo,[6] and Liebherr,[7] have produced electric or hybrid-electric prototypes and commercial models. While technical challenges related to battery capacity and charging infrastructure persist for the largest classes of equipment, electric powertrains provide operational advantages such as the elimination of on-site emissions, reduced noise levels for operation in urban areas, and potentially lower maintenance and energy costs.[8]

Types

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These subdivisions, in this order, are the standard heavy equipment categorization.

Tractor

Grader

Excavator

Backhoe

Timber

Pipelayer

Scraper

Mining

Articulated

Compactor

Loader

  • Loader (payloader, front loader, wheel loader, integrated tool carrier)
  • Skip loader (skippy)

Track loader

Skid-steer loader

Material handler

Paving

Underground

Hydromatic tool

Hydraulic machinery

Highway

Images

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  • The Caterpillar D10N bulldozer evolved from tracked-type tractors and is characterized by a steel blade attached to the front that is used to push other equipment and construction materials, such as earth.
    The Caterpillar D10N bulldozer evolved from tracked-type tractors and is characterized by a steel blade attached to the front that is used to push other equipment and construction materials, such as earth.
  • The bucket excavator Komatsu PC210-LC.
    The bucket excavator Komatsu PC210-LC.
  • The wheel trencher MARAIS SMC 200 R.
    The wheel trencher MARAIS SMC 200 R.
  • Iron bar reinforced foundation piles are driven with a drilling machine, concrete pump, mixer-truck, and a specialized auger that allows pumping concrete through its axis while withdrawn.
    Iron bar reinforced foundation piles are driven with a drilling machine, concrete pump, mixer-truck, and a specialized auger that allows pumping concrete through its axis while withdrawn.
  • Fixed crane in a coal mine in Germany
    Fixed crane in a coal mine in Germany
  • Caterpillar D9L bulldozer, excavators and other heavy equipment vehicles parked near a quarry in Israel
    Caterpillar D9L bulldozer, excavators and other heavy equipment vehicles parked near a quarry in Israel
  • Bucket wheel excavators in Garzweiler surface mine, Germany
    Bucket wheel excavators in Garzweiler surface mine, Germany
  • Wheel loader
    Wheel loader
  • Grader cleaning and leveling
    Grader cleaning and leveling
  • Heavy duty excavator with large bucket equipped.
    Heavy duty excavator with large bucket equipped.
  • Landfill compactor (tamping tip)
    Landfill compactor (tamping tip)
  • Komatsu Dozer pushing coal on the job site
    Komatsu Dozer pushing coal on the job site
  • A wheeled front loader tractor equipped with a large bucket elevated by hydraulic rams.
    A wheeled front loader tractor equipped with a large bucket elevated by hydraulic rams.
  • Folded conveyor on a tracked grinder
    Folded conveyor on a tracked grinder

Implements and hydromechanical work tools

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Traction: Off-the-road tires and tracks

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Main articles: Off-the-road tire and Caterpillar track
Continuous track (circa 1909)
Caterpillar track (circa 2009)

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 earthmoving 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. Since tires are a large expense on any construction project, careful consideration should be given to prevent excessive wear or damage.


Heavy equipment operator

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Main article: Heavy equipment operator

A heavy equipment operator drives and operates heavy equipment used in engineering and construction projects.[9][10] Typically only skilled workers may operate heavy equipment, and there is specialized training for learning to use heavy equipment.

Much publication about heavy equipment operators focuses on improving safety for such workers. The field of occupational medicine researches and makes recommendations about safety for these and other workers in safety-sensitive positions.

Equipment cost

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Due to the small profit margins on construction projects it is important to maintain accurate records concerning equipment utilization, repairs and maintenance. The two main categories of equipment costs are ownership cost and operating cost.[11]

Ownership cost

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To classify as an ownership cost an expense must have been 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

Dn = purchase price / N

Book value (BV) in year m

BVm = purchase price – (m x Dn)

example:

N = 5

purchase price = $350,000

m = 3 years from now

BV3 = $350,000 – ( 3 x $350,000/5) = $140,000

Operating cost

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For an expense to be classified as an operating cost, it must be incurred through use of the equipment. These costs are as follows:[12]

  • tires
  • 3rd party service contract
  • replacement of high-wear items

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. How a firm chooses to cost major and minor repairs vary from firm to firm depending on the costing strategies being used. Some firms will charge only major repairs to the equipment while minor repairs are costed to a project. Another common costing strategy is to cost all repairs to the equipment and only frequently replaced wear items are excluded from the equipment cost. Many firms keep their costing structure closely guarded[citation needed] as it can impact the bidding strategies of their competition. In a company with multiple semi-independent divisions, the equipment department often wants to classify all repairs as "minor" and charge the work to a job – therefore improving their 'profit' from the equipment.


Models

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Main article: Model construction vehicle

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.

Notable manufacturers

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The largest 10 heavy equipment manufacturers in 2022[14]

No. Company Country Sales (billion USD) Share of total
1 Caterpillar  United States 37,5 16.3%
2 Komatsu  Japan 24,7 10.7%
3 XCMG  China 13,4 5.8%
4 John Deere  United States 12,5 5.4%
5 Sany  China 11,9 5.2%
6 Volvo Construction Equipment  Sweden 9,9 4.3%
7 Liebherr   Switzerland 9,9 4.3%
8 Hitachi Construction Machinery  Japan 9,2 4.0%
9 Sandvik  Sweden 7,8 3.4%
10 JCB  United Kingdom 7,0 3.0%


Other manufacturers include:

See also

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References

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  1. ^ Peurifoy & Schexnayder "Construction Planning Equipment, and Methods" McGraw Hill 6th edition ISBN 0-07-232176-8, 2002.
  2. ^ G. N. Aretoulis; K. C. Apostolou (July 2023). "Comparative Evaluation of Fleet Management Software in the Greek Construction Industry". Journal of Engineering and Applied Sciences. 14 (2).
  3. ^ A. K. M. F. U. Islam; J. Suhonen (January 2024). "Developing a comprehensive solution for collecting and managing data from machines by different manufacturers". Journal of Engineering and Applied Sciences. 15 (1).
  4. ^ "Caterpillar Announces Acquisition of Robotic Expertise" (Press release). Caterpillar. June 2020. Retrieved July 14, 2020.
  5. ^ Lambert, Fred (January 29, 2019). "Caterpillar unveils an all-electric 26-ton excavator with a giant 300 kWh battery pack". Electrek. Retrieved July 14, 2020.
  6. ^ McLoud, Don (April 24, 2020). "Volvo CE gets $2M grant to test electric excavator, loader in California". Equipment World. Randall-Reilly. Retrieved July 14, 2020.
  7. ^ Gruver Doyle, Marcia (November 18, 2019). "Liebherr's prototype battery-powered LB 16 drilling rig has 10-hour run time (VIDEO)". Equipment World. Randall-Reilly. Retrieved July 14, 2020.
  8. ^ Rubenstone, Jeff (June 5, 2019). "Construction Equipment Goes Electric, But Hurdles Remain". Engineering News-Record. BNP Media. Retrieved July 14, 2020.
  9. ^ U.S. Department of Labor – Occupational Outlook Handbook
  10. ^ V. J. Davies, Ken Tomasin (1996). Construction Safety Handbook. Thomas Telford. ISBN 0-7277-2519-X.
  11. ^ Peurifoy & Schexnayder "Construction Planning Equipment, and Methods" McGraw Hill 6th edition ISBN 0-07-232176-8, 2002.
  12. ^ Bartholomew, S.H. "Estimating and Bidding for Heavy Construction" CSU Chico, Upper Saddle River, NJ: Prentice Hall, ISBN 0-13-598327-4, 2000
  13. ^ "Heavy Equipment parts catalog". AGA Parts. Retrieved 2020-09-30.
  14. ^ "Construction equipment manufacturers: world equipment sales". Statista. Retrieved 2023-12-02.
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  •  Media related to Heavy equipment at Wikimedia Commons
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