Search Results

Modifying and refining the S.A.E. classification for construction and mining equipment was undertaken out of practical necessity, and refers primarily to excavating and bulk handling. An existing broad classification was used to accomplish this based on two fundamental principles: relative equipment mobility and whether excavating and/or bulk handling is required. By using an established organizing process, the following categories (in descending order of inclusiveness) resulted: Class, Group, Type, Kind, Model and Variant. There are over eighty (80) Kinds of equipment with almost ten (10) in the Front-end Loader Type (Wheel-Loaders to Scoops). Kinds were primarily distinguished by obvious visual distinctions of structure and configuration. The S.A.E. classification contains some serious omissions and also confuses levels of refinement. The proposal has many advantages, although to achieve simplicity some inconsistencies were tolerated when Groups and even Types straddled Classes.

Mobile excavating and bulk handling equipment must maintain a balance between agility and ruggedness. This balance is based on prevailing conditions. Agile equipment can be too fragile during loading and a rugged piece can be too sluggish in operation. In mining and heavy construction, difficult job conditions are termed “encumbered space.” These conditions are specified as to their material and geometric properties, with time and human factors effects included. Haulway sections and running surfaces are characterized, along with the bulk solid that is being moved, in an encompassing “total systems” context. Capacities and vehicle weights are examined and specific aspects of conditions are ranked with regard to their impact on agility and ruggedness. Specific weighting factors are also determined. A statistical-graphical method is introduced for determining power requirements for a piece of equipment. This is first done without regard to agility and ruggedness.