Now its meaning has been expanded to describe facilities that manage pedestrian traffic, protect key infrastructure, set boundaries and differentiate roads. Legend has it that street fences began in the 17th century, shaped like inverted cannons, used as border settings and city signs.
Since then, more and more of them have appeared in our daily life, such as supermarkets, restaurants, hotels, shops and stadiums. We often see pillars of different shapes, which are used to indicate the way forward, to protect us from injury, or to inform us whether to park here.
These beautiful "bump-proof lifting piles" beautify the environment, distinguishing the sidewalk from the roadway, and sometimes even serving as chairs to allow us to sit down and enjoy lunch with fixed metal pillars are the most common.
Many guard pillars have aesthetic functions, especially metal guard pillars, which are used to prevent vehicle damage to pedestrians and buildings. They can be used as the simplest way to control entry and exit, and also as guardrail to delineate specific areas.
They can be fixed on the ground individually, or they can form a line to close the road, so that no vehicles can enter, so as to ensure safety.
The metal fence fixed on the ground serves as a long-term fence, while the retractable and movable fence ensures the entry of certified crowd vehicles.
There are three main types of application buildings (decoration), safety (impact resistance) and landscaping (prominent perimeter).
All lifting pillars can be used for building and landscaping purposes only in terms of style, shape and material. When it comes to security applications, different pillars are used to block different objects.
For example, the pillars used to stop traffic are different from those used to deal with protection problems. When it comes to safety applications, first of all, the size of the vehicle and the speed of the vehicle in the event of impact should be taken into account.