2. White helmet: generally the manager of the whole project on the construction site;
3. Blue helmet: the person in charge of safety is at the construction site. If you come several times and wear a blue hat, you are the project safety and quality inspector and administrator;
4. Yellow safety helmet: The most common safety helmet on the construction site is the hat worn by ordinary construction workers;
Extended data:
Safety helmet function
(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.
(3) Biomechanics: It is stipulated in the standard that the helmet must be able to absorb 4 900N N. This is because in biological tests, the human cervical vertebra will exceed the maximum limit when stressed, and the cervical vertebra will be injured, which may lead to paralysis or life-threatening.