Optimum Size of Hauling Units

by Marvin Gates, (F.ASCE), Pres.; Construction Estimating, Inc., West Hartford, Conn.,
Amerigo Scarpa, (F.ASCE), Pres.; Gates-Scarpa and Assocs., Inc., West Hartford, Conn.,

Serial Information: Journal of the Construction Division, 1975, Vol. 101, Issue 4, Pg. 853-860

Document Type: Journal Paper


Construction planners are frequently required to analyze operations that consist of a service or loading facility and a number of hauling units. This is typified in truck and shovel operations. The optimum size hauling unit is shown to be directly proportional to the product of the operators' wages, the cycle time of the hauling unit, and the productivity of the loading facility. It is inversely proportional to the ownership and operating costs of the hauling unit. There also exists an optimum combination of time that the hauling units should spend being loaded and transporting the material. After the optimum size hauling unit is determined then the analysis should proceed with finding the number of hauling units required. The paper develops the necessary equations to make this entire analysis.

Subject Headings: Load factors | Construction management | Service loads | Trucks | Employee compensation and benefits | Load combinations

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