Yellow. Those who wear yellow helmets are all on-site construction workers on the construction site, that is, people who work, such as carpenters and bricklayers.
Red. Generally, the staff of the construction site project department and the customers who are going to buy a house are wearing red helmets and are responsible for checking back and forth at the construction site.
Blue. Blue is generally worn by construction workers of special types such as electricians, welders, tower crane drivers and excavator drivers.
White. Party A's leaders and project supervisors generally wear white helmets at the construction site.
Extended data
(1) Buffer and shock absorption: there is a gap of 25 ~ 50 mm 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, so that the focus becomes the focal plane, thus avoiding the stress concentration of the impact force at a certain point of the cap shell and reducing the force per unit area.