GB/T 3608-2008 in English

《GB/T 3608-2008高处作业分级》由TC288（全国安全生产标准化技术委员会）归口，主管部门为应急管理部。
本标准于1983年4月首次发布，1993年12月第一次修订。
本标准规定了高处作业的术语和定义、高度计算方法及分级。
本标准适用于各种高处作业。
本标准代替GB/T 3608-1993《高处作业分级》。本标准是对GB/T 3608-1993的修订。
本标准与GB/T 3608-1993相比，主要变化如下：
―――增加了术语的英文对应词（本标准的第3章）和部分术语的符号（本标准的3.4～3.6），修改了定义的形式（本标准的第３章；GB/T 3608-1993的第3章），对部分术语的先后顺序进行了调整（本标准的3.3～3.5；GB/T 3608-1993的3.3～3.5）；
―――修改了客观危险因素中的阵风风力［本标准的4.2a）；GB/T 3608-1993的4.2a.］；
―――修改了客观危险因素中的高温条件［本标准的4.2b）；GB/T 3608-1993的4.2b.］；
―――修改了客观危险因素中的低温作业环境［本标准的4.2c）；GB/T 3608-1993的4.2c.］；
―――增加了冷水作业客观危险因素，并作了具体规定［本标准的4.2d）］；
―――修改了光线和能见度条件［本标准的4.2f）；GB/T 3608-1993的4.2e.］；
―――修改了接近或接触危险电压带电体这一客观危险因素，对接近危险电压带电体的距离作了具体的规定［本标准的4.2g）；GB/T 3608-1993的4.2f.］；
―――修改了立足处只有很小的平面这一客观危险因素，对“很小的平面”作了具体量化的规定［本标准的4.2h）；GB/T 3608-1993的4.2g.］；
―――修改了超过体力搬运重量限值的搬运这一客观危险因素，用体力劳动强度代替了搬运重量，并规定了属客观危险因素的体力劳动强度级别［本标准的4.2i）；GB/T 3608-1993的4.2i．］；
―――增加了在存在有毒气体或缺氧的环境中作业的客观危险因素［本标准的4.2j）］；
―――修改了抢救突然发生的各种灾害事故这一客观危险因素，增加了“可能会引起各种灾害事故的作业环境”的内容［本标准的4.2k）；GB/T 3608-1993的4.2h.］；
―――删除了附录A中有关符号表示的内容［GB/T 3608-1993的A1］。

1 Scope

This standard specifies terms and definitions, calculation method for highness and classification of work at heights.
This standard is applicable to all kinds of work at heights.

2 Normative References

The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB 3869-1997 "Classification on Intensity of Physical Work"
GB 4200-2008 "Classified Standard of Working in the Hot Environment"

3 Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.
3.1 Work at heights
Work carried out in high places 2m or more above the datum plane for highness of falling (3.2) and may fall.
3.2 Datum plane for highness of falling
Horizontal plane of the lowest place in possible falling bounds (3.3).
3.3 Possible falling bounds
Cylindrical space lined out with the working position as its center and the possible falling bounds (3.4) as its radius, and it is vertical to the horizontal plane.
3.4 Radius of possible falling bounds
R
A horizontal distance from the working position specified to determine the possible falling bounds (3.3).
Note: Radius of possible falling bounds is expressed with meter; its size depends on the basic highness (3.5) relating to the landform, terrain or building distribution etc of the working field. The specific regulation is made based on statistical analysis of numerous high fall accident cases.
3.5 Basic highness
hb
Height difference of the lowest place in cylindrical space, which is lined out vertical to horizontal plane with working position as its center and a radius of 6m, to the working position.
Note: Basic highness is expressed with meter.
3.6 Highness of work [at heights]
hw
In working area, the maximum value in vertical distance from each working position to their corresponding datum plane for highness of falling (3.2).
Note: The highness of work at high place is expressed with meter; the calculation method is detailed in Appendix A.

4 Classification of Work at Heights

4.1 The highness of work at heights is classified into four sections, including 2m~5m, above 5m and below 15m, above 15m to 30m and above 30m.
4.2 Objective risk factors leading to falling directly are classified into 11 categories:
a) Gust with its wind force above five grade (wind speed 8.0m/s);
b) Hot environment working of Grade II or above specified in GB/T 4200-2008;
c) Working environment with its average temperature lower than or equal to 5℃;
d) Works contacting cold water lower than or equal to 12℃;
e) Working place with slippery stuff such as ice, snow, frost, water and oil.
f) Working place with insufficient light, low visibility;
g) Distance from scope of working activity to the charged body of hazardous voltage less than those specified in Table1;