What's the name of the man in the blue helmet?

On the construction site, it is usually the professional and technical workers of the construction unit who wear blue helmets, such as electricians and machine operators.

We usually see helmets in five colors: white, red, blue, yellow and burgundy.

1, white helmet: generally it is the supervisor or Party A, and the supervisor is what we think of as the site manager, generally it is the middle-level personnel of the project, who is mainly responsible for the plan implementation and project quality of the site.

2. Red safety helmet: It is usually carried by technicians, managers or Party A. People wearing red helmets are relatively complicated, but they can generally be divided into two categories: technicians and middle and low-level managers.

3. Blue helmet: generally a technician. The choice of red helmet and blue helmet varies according to different enterprises. In short, most of them are worn by technicians, such as electricians and machine operators.

4. Yellow safety helmet: Generally, ordinary workers, and ordinary workers in most construction sites in China wear yellow safety helmets.

5. Wine red helmets: There are few wine red helmets, which are usually worn by developers or upper-level leaders. The leader is mainly responsible for real-time inspection of construction progress, and may also be the leader of foreign inspection. So in a sense, a burgundy helmet can also be said to be a concierge hat.

defense mechanism

(1) Buffer and shock absorption: there is a gap of 25~50mm between the cap shell and the cap lining. When an object hits the helmet, the cap shell will not directly affect the top of the head due to stress deformation.

(2) dispersed stress: the cap shell is oval or hemispherical with smooth surface, so when the object falls on the cap shell, it can't stay, but immediately slides down; In addition, the force borne by the impact point of the cap shell is transmitted to the surroundings. By buffering the cap lining, the force can be reduced by more than 2/3, thus turning the focus into the focal plane, avoiding the stress concentration of the impact force at a certain point of the cap shell and reducing the force per unit area.