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Let us agree upon one thing: no barriers is perfect everywhere, but many people want us to belive that!
A suitable barrier for passage control should:
Be fast, max 3 sec
Not be longer than 4 - 4,5 meter
Be strong (evaluate from case to case)
Not be possible to open manually in a closed position
Not close on time, but when leaving the detector loop
Not reverse (open again) when the detector loop is affected during closing, only stop
Be equipped with an easy-adjustable electronic control
If you follow these guidelines, there will be a satisfactory solution in most cases.
This roadblocker is installed above the ground and has an impact resistance of 400.000 Joule.
Passage width max 5,5 m and the height is 0,5 m.
The left-sided description applie to standard cases, but some particular applications require specific solutions:
All barriers should also be equipped with red/green traffic lights, which should work in a way that the car gets the green lights only when driving into the right direction, the opposite direction being signalled red. Some suppliers of barriers have that function in their control logic.
Retractable bollars has been a fast-growing product on the market, but unfortunately, the knowledge among the users has not grown as fast.
Traditional retractable bollars have some disadvantages compared to rising barriers:
The significant disadvantage with retractable bollards is that it is diifficult to see them when they start fo close (rise). When you are closer than 5 meter, sitting inside a car, you do not see the bollard when it starts to close.
When a car is driving at 25 km/h, it moves 7 meter per sec. A standard bollard rises 12 centimeter per sec. Therefore,
In general bollards should not be used where you open and close an entrance/exit very often because of the incurred high maintenance sosts.
Most of the suppliers of bollards describe no more than themoving parts above the ground, but the hidden elements (in the foundation pit) are those that determine the strength of the bollard.
The picture to the right illustrates two different kind of bollard foundations:
Conclusion: The bollard to the right will need less maintenance. Check your offer!
Most suppliers offer a full range of bollards, comprising fixed, removable and manual retractable bollards, as well as fixed shallow mount bollards (picture to the right) that can be installed in 20 cm concrete and classified as security products.
Bollards that feature a flat surface are also available on the market.
Security bollards should be used for locationes where high security is essential. Four norms are governing the fields: DOS, ASTM F2656, PAS68 and the new international IWA14-1; the latter being divided into two classes:
Thr traditonal security bollards need an axcavation with 1,5 - 2 m deepth, which sometimes is unpractical and disadvantage them. Nevertheless, the market is offering some attractive alternatives:
A shallow mounted retractable bollard that requires an excavation depth of jsut 500 mm and yet resisting an impact of 1.800.000 Joule.
The same principle also applies fo fixed bollards.
A shallow mounted solution with both fixed and automatic sliding bollards offering animpact resistance of 1.200.000 Joule.
With a depth of just 100 mm it can be installed on the ground or below.
All moving parts are visible at all the time.
A retractable high security bollard with height 1000 mm, an impact resistance of 700.000 Joule, requiring an excavation depth of only 1100 mm.
This system is entirely surface-mounted, modular and easy to move; it resists an impact of 250.000 Joule.
It is convenient for securing temporary events, in stadiums, festivals, public squares or VIP visits.
Roadblockers exist in many different shapes, widths, heights and impact resistance.
Their task is to stop different heavy vehicles in different speeds. We have choosen to show different types and their impact resistance.
Below are some samples of Security products with impact resistance less than
Security rising barrie with an impact resistance of 250.000 Joule.
Passage width 3 m and the center of the moving obstacle about 0,65 m above groud.
High-security products with impact resistance from 700.000 upwards:
This simple roadblocker has an impact resistance of 7000.000 Joule.
Width max 6 m, heigth 500 mm and depth below ground 500 mm, but can also be installed above grounds.
This beam barrier has an impact resistance of 2.000.000 Joule. Max free opening width 7 m, the center of the moving obstacle is 1180 mm above ground with an instllation depth of 400 mm.
Those were a few samples of different types of roadblockers on the market.
The choise is depending on the requested level of security,
which can also be affected by the way the roads are planned.
Please contact us for further information.