High fall accidents account for a large proportion!
According to the analysis of “Shenzhen Industry and Trade Industry Production Safety Accident Research” in June 2018, from 2016 to 2017, a total of 73 accidents occurred in the industry and trade industry, with 59 deaths and 21 injuries. People (including 11 seriously injured), of which:
10 falls from heights, accounting for 13.69% of the total number of accidents;
9 people falling from heights, accounting for 15.25% of the total deaths.
Lack of protection is an important reason!
“Lack or defective protection, insurance, signaling and other devices” caused 36 accidents, accounting for 49.31% of the total number of accidents; 38 people died, accounting for 64.40% of the total death toll ;
“Defects in equipment, facilities, tools, and accessories” caused 11 accidents, accounting for 15.06% of the total number of accidents, and 9 people died, accounting for 15.25% of the total death toll.
Characteristics of falling from a height
1. Short time and large distance
2. Fast speed and large energy
3. Irreversible and high damage
Therefore, the factors that affect the magnitude of the fall accident are :
Weight, the heavier the person receives the greater the impact;
the height of the fall;
the buffer time when landing;
the body’s landing position.
Safety protection is very important!
Main protective measures to prevent falling accidents from heights
(1) Safety helmets: stipulate that safety helmets that meet safety standards must be worn and fastened in places and operations The cap strap prevents the cap from falling off when the person falls and loses its protective effect.
(2) Safety net: According to the JGJ59-99 standard, where there is no external frame protection operation point, a safety flat net must be installed 4m above the ground, and a safety flat net should be installed in high-rise construction.
(3)Fall protection system
Fall brake system
Fixed points and connections
What is a fall protection system?
Fall protection, as the name implies It is to protect high-altitude operators from being threatened by a high-altitude fall or to protect high-altitude operators from further injury after a fall (according to the GB/T 3608-2008 standard, high-altitude operations refer to the fall height reference level 2 m and above , The work carried out in the position where there is a possibility of falling).
Full body seat belt
The main function of the seat belt is to decompose and transfer the force and energy generated during the fall to protect the human body. The full-body seat belt is the only product suitable for fall braking. Choose the appropriate seat belt according to the type of work and the environment.
According to the GB/T 23468-2009 standard, work in a place with a fall risk of 2m or more from the reference level of the fall height. When protecting individuals from falling, you should use a fall suspension seat belt or a zone restriction seat belt. According to the EN361 standard, the bearing capacity of the metal hanging point on the back of the seat belt should be 15KN, and it should be maintained for 3 minutes.
The body of the half-length seat belt cannot be kept upright, and there will be a secondary risk when falling; at the same time, all the impact is concentrated on the lumbar spine, which will cause great harm to the human body. According to the OSHA 1926.502 standard, the United States banned the use of half-length seat belts in 1998.
Fall braking system
Fall braking system, also known as anti-fall brake, is the middle of the fall protection whole body safety belt and the fixed point or connecting piece (hanging rope, lifeline, etc.) hub. It can be divided into guiding type, shock absorption type, self-locking speed difference type and so on. When selecting a product, the possible fall height must be calculated according to the working environment to confirm the required fall prevention system.
Fixed points and connecting parts
Fixed points (connecting slings, poles, tripods, etc.) are the stress points of the entire fall protection system. Specific requirements: Europe: 10KN static load test for 3 minutes (EN795); China: GB6095 according to European standards. The fixed points should be located as high as possible to avoid collisions with the ground or low-rise structures when workers fall.
Connectors (hooks, large-caliber safety hooks, etc.) are components that connect the connection system to the suspension point. According to the EN362 standard, the bearing capacity should be 20KN and last for 3 minutes.
The lifeline system is a device that allows aerial operators to work at heights vertically or horizontally or freely pass through.
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