GB/T 17300-2017Earth-moving machinery -- Access systems (English PDF)

1 Scope

This Standard specifies criteria for systems that provide access to the operator station and to routine maintenance points on earth-moving machinery as defined in ISO 6165.

It is applicable to the access systems (e.g., enclosure openings, platforms, guardrails, handrails and handholds, stairways and steps, ladders) on such machines parked in accordance with the manufacturer's instructions. Its criteria are based on the 5th to 95th percentile operator dimensions as defined in ISO 3411. It deals with the following significant hazards, hazardous situations and events: slip, trip and fall of persons, unhealthy postures and excessive effort.

The general principles set out in this Standard can be used for the selection of fixed and/or portable access systems for repairs, assembly, disassembly and longer interval maintenance.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 17888.1-2008, Safety of machinery - Permanent means of access to machinery - Part 1: Choice of a fixed means of access between two levels (ISO

14122-1:2001, IDT)

ISO 3411, Earth-moving machinery - Physical dimensions of operators and minimum operator space envelope

ISO 6165, Earth-moving machinery - Basic type - Identification and terms and definitions

ISO 12508, Earth-moving machinery - Operator station and maintenance areas -

Bluntness of edges

ISO 14122-4, Safety of machinery - Permanent means of access to machinery -

Part 4: Fixed ladders

ISO 14567, Personal protective equipment for protection against falls from a height - Single-point anchor devices

GB/T 17300-2017/ISO 2867:2011

5.2 For primary openings that are modified rectangles, the minimum opening area may be reduced to the minimum opening dimensions indicated by dashed lines in the drawing in Table 1. Alternatively, the vertical distance from the floor of the lower (narrower) area of the minimum opening may be increased from 460 mm to 770 mm maximum, in conjunction with an increase in the minimum width from 250 mm to 300 mm. The shape of openings does not need to be symmetrical.