This standard specifies the terminology, height calculation method and classification of height work. This standard is applicable to all kinds of height work. GB/T 3608-1993 Classification of height work GB/T3608-1993 standard download decompression password: www.bzxz.net

546 Compilation of laws, regulations and standards for construction safety National Standard of the People's Republic of China
Classification of work at height
GB /T 3608 - 93
1 Subject content and scope of application
GB 3608 - 83
This standard specifies the terminology, height calculation method and classification of work at height; this standard applies to all kinds of work at height.
2 Reference standards
GB4200 Classification of high-temperature work;
GB12330 Weight limit for manual handling.
3 Terminology
3.1 Work at height
Any work performed at a height where there is a possibility of falling from a height of 2m or more (including 2m) from the falling height reference plane is called work at height. 3.2 Falling height reference plane
The horizontal plane passing through the lowest point in the possible falling range is called the falling height reference plane. 3.3 Possible Falling Range Radius
The horizontal distance relative to the working position specified to determine the possible falling range is called the possible falling range radius. Its size depends on the foundation height related to the topography, topography or building distribution of the working site. 3.4 Foundation Height
With the working position as the center and 6m as the radius, a cylindrical space perpendicular to the horizontal plane is drawn. The height difference between the lowest point in this cylindrical space and the working position is called the foundation height. 3.5 Possible Falling Range
With the working position as the center and the possible falling range radius as the radius, the cylindrical space perpendicular to the horizontal plane is called the possible falling range.
3.6 High-altitude Working Height
The maximum vertical distance from each working position in the working area to the corresponding falling height reference plane is called the high-altitude working height of the working area. Referred to as the working height. The calculation method is shown in Appendix A (Supplement). 4 Classification of work at height
4.1 The working height is divided into four areas: 2~5m; >5~15m; >15~30m and >30m. 4.2 The objective risk factors that directly cause falling are divided into nine categories: a. Gusts of wind force level 6 (wind speed 10.8m/s) or above; b. High temperature conditions above level II specified in GB4200; c. Outdoor environment with temperature below 10℃;
d. There are slippery objects such as ice, snow, frost, water, oil, etc. on the site; e. Insufficient natural light and poor visibility;
f. Approaching or touching live parts with dangerous voltage; Part 4 Standards and specifications 547
g. Swinging, the foothold is not flat or has only a small flat surface, which makes it impossible for the operator to maintain a normal posture; h. Rescue of various sudden disasters and accidents; 1. Carrying that exceeds the requirements of GB12330.
4.3 Height work that does not contain any of the objective risk factors listed in Article 4.2 shall be classified according to the Class A method specified in Table 1. Height work that has one or more of the objective risk factors listed in Article 4.2 shall be classified according to the Class B method specified in Table 1. Classification of height work
Classification method
Working height (m)
>5 ~ 15
Appendix A
Working height calculation method
(Supplement)
>15 ~ 30
A1 The radius of the possible falling range is represented by R, the base height is represented by h, and the working height is represented by H. A2 The radius R of the possible falling range is as follows: Www.bzxZ.net
a. When h is 2~5m, R is 3m;
b. When h is >5~15m, R is 4m;
c. When h is >15~30m, R is 5m;
d. When h is >30m, R is 6m
A3 Calculation method and example of working height
A3.1 The calculation method of working height is as follows:
a. Determine the foundation height h according to Article 3.4;
b. Determine the radius R of the possible falling range according to Chapter A2; C. Determine the working height H according to Article 3.6.
A3.2 Example
Example 1: As shown in Figure Al, where h=20m, R=5m, and H=20m. Table 1
Compilation of laws, regulations and standards for construction safety Figure Al
Example 2: As shown in Figure A2, where h=20m, R=5m, H=14m. Transmission area
Example 3: As shown in Figure A3, where h=29.5m, R=5m, H=4.5m Operation area
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.