Bollards are utilized in a number of applications, for one of several purposes. You need just to keep a sharp eye to view bollards around us every single day. In parking lots, driveways, and drive-thru lanes, bollards are used to protect buildings, teller machines, utilities including gas meters, electrical equipment and fire hydrants, handicap parking signs, gate entry keypads, and to restrict access to undesired areas. In factories and warehouses, bollards are important for protecting pedestrians in addition to guarding storage racks and capital equipment from fork truck collisions.
Other industries which look for a heavy utilization of traffic bollards include automated car wash facilities, self-storage facilities, service stations and convenience stores, propane dispensing, and parking garages, and others.
Foundation mounted bollards are usually set up in among two ways. The first, most affordable way, is to use a plate mounted bollard. These bollards are steel pipes welded to your flat steel plate that can be anchored to a hard surface using concrete anchors. This method of installation is quick and inexpensive, requiring the installer to drill four to eight holes within the concrete and bolt down the bollard with expansion or screw anchors.
The downside to this installation method, when used with a rigid bollard, is that the anchors are generally not sufficiently strong enough to withstand anything over a minor collision. The plate anchors often are pulled up and possibly the plate bends, leaving a post which leans and has stopped being able to properly serve its purpose. Plate mounted bollards often require constant maintenance and replacement.
The second method for installing bollards involves utilizing a longer steel pipe and burying a percentage of this deep in the earth. This technique gives the bollard much more strength than surface mounted, however it can be very costly to install if the surface is concrete and already poured. Installation in this instance requires coring a hole within the surface utilizing an expensive diamond bladed coring saw. These appliances along with their blades are pricey and require water cooling, making a mess during installation. Once the concrete is cored and also the bollard is at place, the hole must be backfilled with concrete to secure the bollard. For additional strength, these bollards are frequently filled with concrete, too. Even though the bollard pipe itself is comparatively cheap, this installation method is costly and time intensive.
Although very strong, there are significant disadvantages to core installations. Above all, there is no give to this technique upon impact. Though desired in high security applications, any vehicle impacting such a bollard will likely be significantly damaged along with its passengers vulnerable to injury. Loads carried by fork trucks may also be thrown due to the jarring impact prone to occur. Further, the bollard or its foundation may be damaged by this kind of impact, again leaving a tilted and fewer effective barrier requiring costly maintenance to fix. Frequently the steel bollard is beyond repair and must get replaced with an entirely new bollard.
Another downside of this sort of installation is that it is a permanent installation with little flexibility for movement. In factory applications, devices are often moved and rearranged. Bollards employed to protect equipment or storage racks which can be core-installed are certainly not easily moved. The concrete around the bollard should be broken out and also the large remaining hole filled, leaving a factory floor full of unsightly patches. When the bollard itself is reusable after removal, the whole expensive installation process begins over on the new location.
Some designs have been created to attempt to solve these complications with the use of plastic or spring loaded bollards, however these designs suffer from a lack of strength. When the plastic is of insufficient stiffness, the complete function of access denial is lost. On the contrary, very stiff plastic designs have had difficulty with long-term durability. Minor collisions have a tendency to wear away at such devices, and in outdoor applications UV degradation turns into a concern.
Designed and patented in Europe by Belgian inventor Gerard Wolters is a unique system which solves most of the problems associated with traditional foundation mounted bollards. In other words, the system uses a compressed rubber base to do something being an energy absorbing mass. This elastomer allows the bollard to tilt slightly when impacted, in all the different 20 degrees from vertical, then return upright while still stopping the colliding vehicle.
This technique is attached to concrete using concrete anchor screws. These anchors affix the base component within the adapter, which pre-compresses the elastomer against the ground. The base and adapter pieces are created from an exclusive ductile cast iron, which makes the pieces less brittle than typical cast iron, and also has a very low (-40 degrees) brittleness temperature. The steel pipe which may serve as the bollard post is actually a typical steel pipe inserted in to the adapter. Standard pipe is used to provide the end user the flexibility to weld fencing using standard components if needed. Concrete fill is not required inside the bollard pipe, though is permitted. In reality, sign posts could be inserted to the post and concrete filled in place.
Upon collision, the pipe and adapter are permitted to tilt within the base, forcing the adapter to further compress the elastomer in the direction of the impact. The elastomer absorbs much of the power in the impact and lengthens the deceleration time of the vehicle. The elastomer is of sufficient strength to then rebound, usually pushing the car away from the bollard and returning to a vertical position. The tilt in the pipe is restricted to approximately 20 degrees after which the bollard will become rigid.
Bollards are made in a number of sizes, every one of that is right for various expected collision speeds and masses. Further, modular connectors which could be used to create fencing and guards away from multiple base units happen to be created to eliminate welding. By using multiple base units, the best strength in the rebounding bollard unit can be increased.
These new bollards use the more simple way of surface installation, greatly reducing installation costs, and keep the flexibleness to go bollards as conditions warrant. This is accomplished with no normal downside of lack of strength, as the elastomer in the bollard system greatly decreases the maximum impact forces put on the base anchors. The reason being deceleration of your impacting vehicle is far less severe than throughout an impact with a rigid bollard. Energy is transferred to the elastomer rather than straight to a rigid post, decreasing the harsh impact of a relatively immovable object.
This leads straight to the most significant benefits of the brand new bollard system and that is the reduction of injury to both offending vehicles and to the bollard system itself. Direct injury to vehicles is reduced due to the lowering of peak impact force seen from the vehicle. This will not only avoid injury to the vehicle, but the chance of injury to a passenger is likewise reduced. When it comes to a fork lift in a factory or warehouse, the possibility of a thrown load is also reduced, avoiding the opportunity of bystander injury and stock loss.
Finally, damage to the bollard along with its foundation is reduced. Since the post is constructed of strong steel pipe, it maintains its strength, but because of its forgiving nature, a lot less force is moved to the cornerstone. This simplifies and eliminates maintenance while preserving an great looking facility.
These bollards must be installed on concrete, being an asphalt surface will not be of adequate strength to anchor the bollard system. Thinking about the replacement costs of damaged bollards, however, it could be affordable to pour a concrete pad and eliminate many years of costly maintenance and asphalt repair. As previously mentioned, each bollard is sized for expected loads with regards to mass and speed. Should that limitation be exceeded, it is actually easy to break a element of the device. More than likely which involves the post, adapter, or base. Fortunately, the device is modular and simply repaired. Posts may be replaced by loosening several set-screws, wwbpkl and replacing, and re-tightening the set screws. Adapter and Base components can be replaced by carefully removing the concrete screw anchors and replacing the component.
The SlowStop Bollard product is an innovative new product which solves most of the problems included in bollard collisions in addition to installation and maintenance issues. Damage to vehicles, passengers, vehicle loads, and also the locking bollards themselves is cut down tremendously as a result of absorption of impact energy by an elastomer hidden within the lower bollard. This elastomer allows the bollard to tilt when impacted and return upright afterward. SlowStop Bollards are quick and inexpensive to put in, flexible because they are easily moved, and simple to keep if there is the need. Safety fencing and barriers are often created using modular connectors, avoiding the requirement to weld pipe together.