Bollards are used in a multitude of applications, for one of several purposes. One needs only to keep a sharp eye to view bollards around us each day. In parking lots, driveways, and drive-thru lanes, bollards are used to protect buildings, teller machines, utilities such as gas meters, electrical equipment and fire hydrants, handicap parking signs, gate entry keypads, and to restrict use of undesired areas. In factories and warehouses, bollards are essential for protecting pedestrians along with guarding storage racks and capital equipment from fork truck collisions.
Other industries which find a heavy utilization of metal bollards include automated car wash facilities, self-storage facilities, gas stations and convenience stores, propane dispensing, and parking garages, amongst others.
Foundation mounted bollards are typically placed in certainly one of two ways. The first, least expensive way, is with a plate mounted bollard. These bollards are steel pipes welded to your flat steel plate which can be anchored to your hard surface using concrete anchors. This process of installation is fast and inexpensive, requiring the installer to drill four to eight holes inside the concrete and bolt down the bollard with expansion or screw anchors.
The down-side to this installation method, when combined with a rigid bollard, is the fact that anchors are usually not strong enough to stand up to 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 in a position to properly serve its purpose. Plate mounted bollards often require constant maintenance and replacement.
The 2nd method for installing bollards involves using a longer steel pipe and burying a percentage of it deep in the ground. This method provides the bollard far more strength than surface mounted, however it could be very costly to install if the surface is concrete and already poured. Installation in this case requires coring an opening in the surface employing an expensive diamond bladed coring saw. These machines and their blades are expensive and require water cooling, developing a mess during installation. Once the concrete is cored and also the bollard is at place, the hole should be backfilled with concrete to secure the bollard. For more strength, these bollards tend to be full of concrete, also. Although the bollard pipe is comparatively cheap, this installation strategy is costly and time consuming.
Although very strong, there are significant disadvantages to core installations. Most significantly, there is not any share with this technique upon impact. Though desired in high security applications, any vehicle impacting this kind of bollard will likely be significantly damaged as well as its passengers in danger of injury. Loads carried by fork trucks can also be thrown because of the jarring impact likely to occur. Further, the bollard or its foundation may be damaged by this kind of impact, again leaving a tilted and less effective barrier requiring costly maintenance to improve. Usually the steel bollard itself is beyond repair and should be replaced with an entirely new bollard.
Another disadvantage of this kind of installation is it is a permanent installation with little flexibility for movement. In factory applications, equipment is often moved and rearranged. Bollards utilized to protect equipment or storage racks which can be core-installed are certainly not easily moved. The concrete all around the bollard must be broken out and also the large remaining hole filled, leaving a factory floor filled with unsightly patches. In the event the bollard itself is reusable after removal, the entire expensive installation process begins over at the new location.
Some designs happen to be designed to attempt to solve these problems with the use of plastic or spring loaded bollards, however these designs have problems with too little strength. In the event the plastic is of insufficient stiffness, the whole function of access denial is lost. On the other hand, very stiff plastic designs have had difficulty with long term durability. Minor collisions often wear away at such devices, as well as in outdoor applications UV degradation gets to be a concern.
Designed and patented in Europe by Belgian inventor Gerard Wolters is a unique system which solves most of the problems connected with traditional foundation mounted bollards. To put it simply, the device works with 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 method is connected to concrete using concrete anchor screws. These anchors affix the base component within the adapter, which pre-compresses the elastomer from the ground. The base and adapter pieces are made of a special ductile cast iron, making the pieces less brittle than typical cast iron, and has a very low (-40 degrees) brittleness temperature. The steel pipe which serves as the bollard post is really a typical steel pipe inserted to the adapter. Standard pipe can be used to give the conclusion user the flexibleness to weld fencing using standard components if required. Concrete fill is not needed inside the bollard pipe, though is permitted. In reality, sign posts can be inserted into the post and concrete completed place.
Upon collision, the pipe and adapter are permitted to tilt within the base, forcing the adapter to help compress the elastomer in the direction of the impact. The elastomer absorbs much of the vitality in the impact and lengthens the deceleration duration of the car. The elastomer is of sufficient strength to then rebound, usually pushing the vehicle out of the bollard and going back to an upright position. The tilt in the pipe is restricted to approximately 20 degrees at which point the bollard will end up rigid.
Bollards are made in a number of sizes, all of which is right for various expected collision speeds and masses. Further, modular connectors which can be used to create fencing and guards out of multiple base units have been developed to eliminate welding. By utilizing multiple base units, the ultimate strength of the rebounding bollard unit may be increased.
These new bollards utilize the much easier approach to surface installation, greatly reducing installation costs, while keeping the flexibleness to go bollards as conditions warrant. This really is accomplished minus the normal downside of insufficient strength, since the elastomer inside the bollard system greatly reduces the maximum impact forces placed on the base anchors. This is because deceleration of the impacting vehicle is far less severe than during an impact using a rigid bollard. Energy is moved to the elastomer as opposed to directly to a rigid post, lowering the harsh impact of any relatively immovable object.
This leads straight to the most significant features of the 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 because of the lowering of peak impact force seen through the vehicle. It will not only avoid harm to the automobile, but also the probability of trouble for a passenger is likewise reduced. When it comes to a fork lift in a factory or warehouse, the risk of a thrown load is also reduced, avoiding the chance of bystander injury and stock loss.
Finally, harm to the bollard along with its foundation is reduced. As the post is constructed of strong steel pipe, it maintains its strength, but due to its forgiving nature, a lot less force is moved to the cornerstone. This simplifies and eliminates maintenance while preserving an aesthetically pleasing facility.
These bollards should be installed on concrete, as being an asphalt surface will not be of adequate strength to anchor the bollard system. Considering the replacement costs of damaged bollards, however, it could be economical to pour a concrete pad and eliminate numerous years of costly maintenance and asphalt repair. As previously mentioned, each bollard is sized for expected loads when it comes to mass and speed. Should that limitation be exceeded, it really is easy to break a component of the program. Most likely that concerns the post, adapter, or base. Fortunately, the program is modular and easily repaired. Posts could be replaced by loosening several set-screws, wwbpkl and replacing, and re-tightening the set screws. Adapter and Base components could be replaced by carefully removing the concrete screw anchors and replacing the component.
The SlowStop Bollard method is a revolutionary new product which solves many of the problems involved with bollard collisions along with installation and maintenance issues. Harm to vehicles, passengers, vehicle loads, as well as the locking bollards themselves is cut down tremendously as a result of absorption of impact energy by an elastomer hidden within the bottom of the bollard. This elastomer allows the bollard to tilt when impacted and return upright afterward. SlowStop Bollards are fast and inexpensive to set up, flexible since they are easily moved, and uncomplicated to maintain if there is the requirement. Safety fencing and barriers are often created using modular connectors, avoiding the need to weld pipe together.