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This SAE Recommended Practice establishes the test procedures and minimum performance criteria necessary to fulfill the intended purpose and is applicable to Skidders, Grapple Skidders, and Crawlers when used in the harvesting of trees.

This SAE Recommended Practice establishes the test procedures and minimum performance criteria necessary to fulfill the intended purpose and is applicable to Skidders, Grapple Skidders, and Crawlers when used in the harvesting of trees. Structures meeting these performance criteria may not provide complete operator protection under all conceivable circumstances, but they are expected to minimize the possibility of operator injury under reasonable operating situations. The performance requirements and test criteria included in this document are derived from investigations on operator protection that has performed the intended function in a variety of actual operating conditions. Objective This document is intended to establish a consistent, repeatable means of evaluating Operator Protective Structures (OPS) on Skidders, Grapple Skidders, and Crawlers when used in the harvesting of trees.

This Recommended Practice establishes the test procedures and minimum performance criteria necessary to fulfill the intended purpose and is applicable to Skidders, Grapple Skidders and Crawlers when used in the harvesting of trees.

This recommended practice establishes the test procedures and minimum performance criteria necessary to fulfill the intended purpose and is applicable to Skidders, Grapple Skidders, and Crawlers when used in the harvesting of trees.

This SAE standard applies to all forestry machines exposed to the hazard of objects penetrating the front of the operator station (other than the roof). This would include:

This SAE Standard applies to all forestry machines exposed to the hazard of objects penetrating the front of the operator station (other than the roof). This would include:

This SAE standard applies to all forestry machines exposed to the hazard of objects penetrating the front of the operator station (other than the roof). This would include:

This document applies to off-road forestry work machines defined in SAE J1116 or ISO 6814.

This document applies to off-road forestry work machines defined in SAE J1116 or ISO 6814.

This document applies to off-road forestry work machines defined in SAE J1116 or ISO 6814.

The term "Mobile forestry machines" is intended to include those off-road machines which are designed especially for, or adapted to be used in, the planting, site preparation, harvesting, processing, and transporting of trees. The diversity of machines and systems falling within this scope prohibits detailed specifications, and therefore recommendations are of a general nature.

Mobile forestry machines is intended to include those off-road machines which are designed especially for, or adapted to be used in, the planting, site preparation, harvesting, processing, and transporting of trees. The diversity of machines and systems falling within this scope prohibits detailed specifications, and therefore recommendations are of a general nature.

This standard includes names of major components and parts particular to this type of machine. Illustrations used here are not intended to include all existing commercial vehicles, or to be exactly descriptive of any particular machine. They have been chosen to describe the principles to be used in applying this standard.