Tips: What is a full body harness? What are the advantages compared to traditional seat belts?

The safety belt is a link to protect the life and safety of workers in high-rise crash protection. Therefore, it is essential that the performance of the seatbelt be able to meet the user's safety during use. With the development of construction, shipbuilding, electricity, petrochemical and Other industries, the social demand for seat belts is also growing. The quality of seatbelt products is closely related to the life safety of workers at high altitudes. Therefore, it is classified as a special labor protection article by the state and implements an industrial product production license system and a safety sign certification system.

Due to continuous improvement of the process, foreign advanced designs are also affecting the design and style of our safety belts. In the past, seatbelts used a large number of single belts or single harness styles. However, with the progress of the times, users also have more needs for security in the use of the process. Therefore, full-body seat belts are gradually entering our sight.

Single belt seat belt

Full body harness

According to the user's experience in the actual use of the summary, in general, seat belts should have at least the following properties:

(1) When a high-altitude crash occurs, the operator can be pulled and has sufficient mechanical strength to withstand the impact of the human body falling down, and at the same time, it is ensured that the operator does not slip out of the belt.

(2) The seatbelt should prevent the human body from falling to a certain extent that can cause injury, that is, before the limit, the seatbelt can pull the human body so that it can no longer fall down. When the human body falls from a height and falls below a certain limit, even if the person pulls it, the impact force will be too high, which will cause the internal organs of the human body to be damaged or even cause death. Therefore, it is required that the seat belt should provide the best impact force distribution.

(3) Let airborne operators be in the best possible state of self-rescue and maintain the human body in the best position.

(4) The operator should be able to move freely with safety, comfort and efficiency.

The traditional single belt type belt has a key point at the waist. If the wearer falls during work, the waist will bear the impact caused by the fall whether the human body faces up, down or left or right. But in fact, people's waist is relatively weak, which will cause some hidden dangers. At the same time, workers are also more difficult to self-help.

When a full-body seat belt is worn, the impact force will be evenly distributed to all parts of the trunk such as the legs, waist, chest, and back so as to minimize the damage to the waist and maintain the human body in the best position to facilitate self-rescue. .

Single waist belt force diagram

Full-body seat belt force diagram

It can be seen that the protective effect of a high-quality full-body safety belt when a high-level worker accidentally falls is far higher than that of a single-belt type used in the past. In high-level operations, the rational selection and use of full-body seat belts is an important means of ensuring the personal safety of workers at high altitudes and should be highly valued. Due to the more complex wearing of full-body seat belts, appropriate technical training should be provided for seatbelt users. At the same time, it needs to be reminded that the provision of personal protective equipment to high-level operating personnel is only a kind of “prevention”, so that high-level operating personnel are familiar with and correctly use personal protective equipment is the final safety protection.