Under the same conditions. The higher the altitude, the more serious the degree of fall injured. These one point one aspects can directly draw the conclusion from the accident analysis, on the other hand, the analysis from the point of view of mechanics, the human body in the falling movement process. Always affected by gravity, the landing when the initial velocity increases with the increase of height of fall. So the operating height according to height is divided into 2-5 m, 5--15 m.15-30 m and 30 m above the four area.
1 2-5 m high altitude operation
High altitude operation height in the 2-5 m, because the height is not too high. Because the height of insecurity caused by all kinds of measures for the strength of chaos easily solved. So this height range caused by accidents, mostly for minor injuries.
2 5-15 m high altitude operation
High altitude operation deviation in 5-15 m, the possibility of more serious injury. So will the 15 m as a cut-off point.
3 15-30 m high altitude operation
High altitude operation height in 15-30 m. The accident is basically a fatal accident.
Homework to heights above 4.30 M
More than 30 m high altitude operation accidents. From the injury severity of view, than the job 15-30 m height is more serious. When the "height. Danger caused to an extreme (refers to the state's most dangerous). There is no need to subdivide. Therefore. The above 30 m operation were designated as a district of the city.