New Jersey Profile
Most of the DELTA BLOC® systems are based on the "New Jersey Profile”. It was developed near New Jersey, USA, in the late fifties. Since that time the form has been known as the New Jersey Profile and has been used world-wide. It turned out that due to the New Jersey Profile there is a remarkable lower risk of vehicle overturn.
The majority of all impacts on restraint systems occur at a plane angle of up to 12°. Due to the baffle plate of the New Jersey Profile the vehicle is directed back onto the carriageway – a direct contact between the vehicle and the concrete element is mostly avoided.
In case of serious impacts at high speeds and big impact angles, the repellent plate prevents breakthrough of vehicles in combination with the continuous tension bar with greatest possible safety.
The base is necessary for constructive reasons and serves as both a base area and a catchment for diagonal draining.
These openings conduce to lateral drainage of surface water and thus enable an arrangement of the rainwater in feeds also behind the vehicle restraint system.
In areas of road works the crowded amount of space showed the necessity of especially narrow systems that, nevertheless, guarantee high protection of all road users. The DELTA BLOC® systems DB 50S and DB65S were highly-developed according to these requirements.
The narrow elements are made up of a concrete wall, as well as two galvanized steel angles, which guarantee the required dynamic stability and protection from tilting.
4 elastomer-stands serve as bearings. They assure a safe stability of the elements on the one hand and there again ensure a separation distance to the lateral drainage between steel angles and carriageway.
The steel angles are drivable, without hazard, neither for the vehicle, nor the element. A redirection of the vehicles occurs by the repellent plate.