ISO 3411 Earthmoving Machinery - Physical Dimensions of Operators and Minimum Operator Compartment Area

ISO 3411 Earthmoving Machinery - Physical Dimensions of Operators and Minimum Operator Compartment Area

In the standard "ISO 3411 Earthmoving machines - Physical dimensions of operators and minimum operator compartment space" developed by the International Organization for Standardization (ISO), the dimensions of earthmoving machine operators are provided and the operator as defined in the standard "ISO 6165 Earthmoving machines - Basic types - Description, terms and definitions" The minimum normal operating area envelope within enclosures is described.

ISO 3411 Earthmoving Machinery - Physical Dimensions of Operators and Minimum Operator Compartment Area

For the purposes of this standard,

  • Small operator refers to the operator belonging to the worldwide earthmoving machine operator population, where approximately 5 percent of operators are smaller than the listed sizes.
  • Medium operator refers to the operator belonging to the worldwide earthmoving machine operator population, where approximately 50 percent of the operators are smaller than the listed sizes, and the remaining population of earthmoving machine operators worldwide is larger than the listed sizes.
  • Large operator refers to the operator belonging to the worldwide earthmoving machine operator population, where approximately 5 percent of operators are larger than the listed sizes.
  • Working posture is the posture that the operator adopts while performing work.
  • Upright posture refers to standing or sitting upright without a backrest.

Physical size ranges for standing and seated operators are shown in the figures provided in the standard. Derived body pivot size ranges are also shown in the figure. The dimensions include a tolerance of 25 mm for the height of the shoes or boots. The influence of other clothing on these dimensions is negligible.

All dimensions are for an operator in an upright position. The working posture is generally relaxed and the dimensions are slightly smaller: height and overhead reach are reduced by approximately 15 mm, sitting height and seated eye height are reduced by approximately 25 mm.

In some parts of the world, more than 5 percent of operators have leg lengths shorter than those given for small operators. Special adjustments can be made to accommodate these areas.

In the table given in the standard, values ​​are given for small operator, medium operator and large operator on the following basis:

  • Height (with shoes) (approximately 50mm added for protective helmet if necessary)
  • Arm opening (dimensional values ​​obtained by proportional scaling)
  • Arm opening (elbows folded) (dimensional values ​​obtained by proportional scaling)
  • Head width (head width size does not include ears)
  • Foot width (with shoes)
  • Overhead access (fingertip) (dimensional values ​​obtained by proportional scaling)
  • head length
  • Eye-to-back distance (dimensional values ​​obtained by proportional scaling)
  • Chest depth (dimensional values ​​obtained by proportional scaling)
  • Depth of snow (dimensional values ​​obtained by proportional scaling)
  • Foot length (with shoes)

The values ​​given in this table represent the measured size range of the world's population. Small is approximately the 5th percentile measurement, medium is approximately the 50th percentile measurement, and large is approximately the 95th percentile measurement. In addition, small operator is accepted as 51,9 kg, medium operator is 74,4 kg, and large operator is 114,1 kg.

Additionally, the values ​​in this table are the dimensions obtained while the operator is standing.

Earthmoving machines are multi-purpose machines used in various works in the construction and construction industry. These machines are generally divided into two groups: crawler and tire. Apart from this, earthmoving machines are divided into different groups according to the areas in which they are used. A few of the most commonly used earthmoving machines in the construction industry include: excavators, backhoe loaders, bulldozers, skid steer loaders, and trenchers.

Among the numerous testing, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides testing services defined in the "ISO 3411 Earthmoving machines - Physical dimensions of operators and minimum operator compartment area" standard, with a trained and expert staff and advanced technological equipment. .

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