To protect against terrorist threats, access areas to various objects are surrounded by anti-ram devices. They should be installed near industrial, defense, socially significant buildings. These designs control the passage of vehicles to the protected area.
An anti-ram device is used at level crossings to improve road safety in hazardous areas. This reduces the number of accidents. At the entrance to paid parking you can also see barriers. There are several types of structures that ensure the safety of people and vehicles.
Stationary devices
To protect objects from various kinds of dangers, road blockers, barriers, bollards, gates are installed. Each stationary anti-ram device has its own characteristics. Designs differ:
- different levels of confrontation;
- the width of the passage;
- type of drive;
- opening and closing periods;
- lifting height;
- the temperature at which the product is guaranteed to work;
- complexity of installation;
- technical service;
- cost.
Stationary devices are installed in one place, so they are the most reliable. Many areas in cities are surrounded by just such structures.
Mobile devices
Such designs are quickly delivered and assembled. They can be easily set based on the desired travel width. Products withstand heavy loads, and also stop transport if necessary. Mobile designs are lightweight and autonomous. They provide a stop of transport without serious damage.
By design, the products are uncontrollable. These include metal "hedgehogs", artificial road bumps and portable blockers. Their installation in the necessary territories allows you to prevent many unforeseen situations. Mobile structures are also suitable for protection against free access to the protected area, although it will be more reliable to use stationary products.
The value of road blockers
The powerful design only makes the entry point to the site of the protected facility vulnerable. The anti-ram device creates the security of buildings, and also helps to manage driveways that lead to a closed area.
There are reinforced barriers that have a hydraulic or electromechanical drive. Impact resistance is established during testing. The test results show that the devices stop the moving truck, and the damage occurs on the structure itself.
In the technical specifications, manufacturers designate the axial load indices that the bollards can withstand. When choosing a protective structure, the magnitude of the characteristic, as well as the type of threat, is taken into account. The anti-ram device is controlled by an access control system or remotely using a radio device.
Features of use
Anti-ram devices include bollards. Their difference is that in a raised form they do not restrict walking. Not all roads are blocked, since the posts are placed at a distance of 1.5 meters from each other. Such structures are used in pedestrian areas located near residential and administrative buildings.
The diameter and wall thickness of the column determine the amount of load that will be acceptable for the structure. Installation of anti-ram devices involves opening the roadway, since a concrete structure is placed under them. Bollards are lifted by an electromechanical or hydraulic drive mechanism.
To prevent unauthorized access to the protected area, additional structures are installed. They are mounted at the entrances to the anti-ram structures. Their task is to forcefully reduce the speed of transport. The seconds won allow the guards to put barrage devices in full readiness.
Barrier structures
The anti-ram device of the barrier type allows you to restrict access to a closed area. The product is ideal for driving 3-6 meters wide. Such protection is installed in places of heavy traffic.
The anti-ram barrage device can work in any weather. It is reliable, because it serves as an obstacle for spontaneous entry into a protected area.
Design
Each city has more than one anti-ram device. PTU in the form of barriers are made of an aluminum case, inside of which there is a steel cable. The product can withstand strong shock, as well as stop the car.
Also in the design there are 2 strong supports. They need a powerful foundation, because the product must withstand heavy loads during unauthorized entry. The device has controls and beacons. This is a pretty high-quality design.
Advantages of barriers
The advantages of such products include:
- Durability, because durable materials are used for the manufacture of structures.
- Reliability. Metal parts of the product evenly distribute the load.
- Precise positioning as there is a system of proximity switches.
- Many products can be used in any weather.
- Fast opening and closing times.
Barriers are installed in areas of high wind load. They are suitable for providing safe entry into a protected area.