This recommended practice covers the criteria for steps@ ladders@ walkways@ platforms@ grab rails (handrails)@ grab irons@ guardrails@ and entrance openings as they relate to aiding the operator and/or service?men in performing their functions on the vehicle. This recommended practice does not include any criteria for the floor of the operating compartment. Purpose??This recommended practice is intended as a guide for designing access systems to the operating station and service points on all types of machines used in construction@ material handling@ mining@ logging@ and other similar industries@ primarily to aid in preventing accidents and reducing injury to personnel getting on@ off@ or moving about on vehicles while servicing and/or preparing to operate them.