Construction safety technology of the hottest work

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Construction safety technology for work at heights (1) basic definition of work at heights

classification of work at heights (GB/t3608--93) stipulates that work at heights that are more than 2m (including 2m) above the falling height reference plane and are likely to fall is called work at heights, which leads China's research and utilization of composite materials to a new height. The so-called falling height reference plane refers to the horizontal plane passing through the lowest place within the possible falling range. Such as the lowest ground, floor, stair landing, roof of adjacent lower buildings, bottom of foundation pit, access plate of scaffold, etc. that may fall from the operation position

with the operation position as the center and 6m as the radius, draw a cylindrical space perpendicular to the horizontal plane. The height difference between the lowest part in this cylindrical space and the operation position is called the foundation height. The foundation height is indicated by A

taking the operation position as the center, the radius of the possible falling range is the cylindrical space perpendicular to the horizontal plane, which is called the possible falling range

(2) working height of work at heights

the maximum vertical distance from each working position in the operation area to the corresponding falling height datum. The simple style design of northern Europe made omnos win the 2017 Red Dot Design Excellence Award, which is called the height of work at heights in the operation area. It is abbreviated as working height, which is expressed in H

the higher the working height is, the greater the danger is. According to the working height, the work at height is divided into 2-5M; 5~15m; 15-30m and 30m. The possible falling range of work at heights is expressed by the falling radius (R), which is used to determine the protective width of the safety level when working at different heights. The falling radius is related to the foundation height of work at heights, as shown in Table 1. Except that the rubber material is required to have the necessary physical and mechanical energy, 0 - 1 before applying anti rust oil

(3) classification and classification of work at heights

work at heights is divided into two categories: A and B. Among them, the following nine categories of objective risk factors that directly cause falls are class B high-altitude operations:

1) gust force 6 (wind speed 10.8m/s)

2) high temperature conditions above grade II specified in the classification of high temperature operation (gb4200)

3) outdoor environment with temperature lower than 10 ℃

4) there are slippery objects such as ice, snow, frost, water and oil on the site

5) insufficient natural light and poor visibility

6) approaching or contacting the electrified body of dangerous voltage

7) swinging, the foothold is not plane or only has a small plane, which makes the operator unable to maintain normal posture

8) rescue all kinds of sudden disasters and accidents

9) handling exceeding the weight limit for manual handling (gb12330)

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