Bollards are utilized in a myriad of applications, for one of various purposes. You need only to keep a sharp eye to view bollards around us every single day. In parking lots, driveways, and drive-thru lanes, bollards are utilized to protect buildings, teller machines, utilities like 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 as well as guarding storage racks and capital equipment from fork truck collisions.
Other industries which find a heavy usage of metal bollards include automated car wash facilities, self-storage facilities, gasoline stations and convenience stores, propane dispensing, and parking garages, and others.
Foundation mounted bollards are generally set up in among two ways. The first, most affordable way, is by using a plate mounted bollard. These bollards are steel pipes welded to some flat steel plate that may be anchored to a hard surface using concrete anchors. This technique of installation is fast and inexpensive, requiring the installer to drill four to eight holes in the concrete and bolt along 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 generally not sufficiently strong enough to withstand anything more than a minor collision. The plate anchors often are pulled up and perhaps the plate bends, leaving a post which leans and has stopped being capable of properly serve its purpose. Plate mounted bollards often require constant maintenance and replacement.
The 2nd method for installing bollards involves employing a longer steel pipe and burying a percentage from it deep in the earth. This process gives the bollard far more strength than surface mounted, however it could be very expensive to set up when the surface is concrete and already poured. Installation in cases like this requires coring an opening within the surface employing an expensive diamond bladed coring saw. These machines along with their blades are expensive and require water cooling, developing a mess during installation. Once the concrete is cored as well as the bollard is within place, the hole must be backfilled with concrete to secure the bollard. For added strength, these bollards are frequently filled with concrete, too. Even though the bollard pipe is relatively inexpensive, this installation strategy is costly and time intensive.
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 at risk of injury. Loads carried by fork trucks may also be thrown because of the jarring impact prone to occur. Further, the bollard or its foundation can be damaged by this kind of impact, again leaving a tilted and fewer effective barrier requiring costly maintenance to fix. Usually the steel bollard is beyond repair and should be replaced with the entirely new bollard.
Another disadvantage of this type of installation is that it is really a permanent installation with little flexibility for movement. In factory applications, tools are often moved and rearranged. Bollards used to protect equipment or storage racks which can be core-installed usually are not easily moved. The concrete all around the bollard must be broken out and also the large remaining hole filled, leaving a factory floor full of unsightly patches. In the event the bollard itself is reusable after removal, the whole expensive installation process begins over at the new location.
Some designs have already been developed to try to solve these complications by using plastic or spring loaded bollards, however these designs have problems with an absence of strength. If the plastic is of insufficient stiffness, the entire function of access denial is lost. On the other hand, very stiff plastic designs have had difficulty with long term durability. Minor collisions tend to wear away at such devices, and in outdoor applications UV degradation becomes a concern.
Designed and patented in Europe by Belgian inventor Gerard Wolters is a unique system which solves lots of the problems connected with traditional foundation mounted bollards. Simply put, the program utilizes a compressed rubber base to behave as being an energy absorbing mass. This elastomer allows the bollard to tilt slightly when impacted, in the range of 20 degrees from vertical, then return upright while still stopping the colliding vehicle.
This system is mounted on concrete using concrete anchor screws. These anchors affix the base component on the adapter, which pre-compresses the elastomer from the ground. The base and adapter pieces are made of a unique 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 serves as the bollard post is really a typical steel pipe inserted to the adapter. Standard pipe can be used to offer the end user the flexibleness to weld fencing using standard components if necessary. Concrete fill is not required in the bollard pipe, though is permitted. In fact, sign posts can be inserted into the post and concrete filled in place.
Upon collision, the pipe and adapter are allowed to tilt in the base, forcing the adapter to help compress the elastomer toward the impact. The elastomer absorbs a lot of the power from the impact and lengthens the deceleration duration of the car. The elastomer is of sufficient strength to then rebound, usually pushing the vehicle away from the bollard and returning to a vertical position. The tilt in the pipe has limitations to approximately 20 degrees after which the bollard will end up rigid.
Bollards are designed in a variety of sizes, all of which can be appropriate for various expected collision speeds and masses. Further, modular connectors which could be used to create fencing and guards from multiple base units have been created to eliminate welding. By utilizing multiple base units, the ultimate strength from the rebounding bollard unit could be increased.
These new bollards make use of the more simple way of surface installation, greatly reducing installation costs, and keep the flexibility to go bollards as conditions warrant. This really is accomplished minus the normal drawback to lack of strength, as the elastomer in the bollard system greatly decreases the maximum impact forces placed on the base anchors. It is because deceleration of the impacting vehicle is much less severe than during an impact having a rigid bollard. Energy is transferred to the elastomer instead of directly to a rigid post, reducing the harsh impact of a relatively immovable object.
This leads right to the most crucial advantages of the brand new bollard system and that is certainly the decrease in damage to both offending vehicles and to the bollard system itself. Direct damage to vehicles is reduced because of the reduction of peak impact force seen from the vehicle. It will not only avoid harm to the vehicle, but also the possibility of injury to a passenger is likewise reduced. In the case of a fork lift in a factory or warehouse, the chance of a thrown load is also reduced, avoiding the opportunity of bystander injury and stock loss.
Finally, harm to the bollard and its foundation is reduced. Because the post is constructed of strong steel pipe, it maintains its strength, but due to the forgiving nature, a lot less force is transferred to the foundation. This simplifies and eliminates maintenance while preserving an attractive facility.
These bollards should be installed on concrete, as an asphalt surface is not really of adequate strength to anchor the bollard system. Taking into consideration 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 mentioned before, each bollard is sized for expected loads when it comes to mass and speed. Should that limitation be exceeded, it is easy to break a part of the program. Probably that involves the post, adapter, or base. Fortunately, the system 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 can be replaced by carefully removing the concrete screw anchors and replacing the component.
The SlowStop Bollard method is a progressive cool product which solves lots of the problems included in bollard collisions along with installation and maintenance issues. Damage to vehicles, passengers, vehicle loads, and the removable bollards with locks themselves is greatly reduced due to the absorption of impact energy by an elastomer hidden in the base of the bollard. This elastomer allows the bollard to tilt when impacted and return upright afterward. SlowStop Bollards are quick and inexpensive to set up, flexible since they are easily moved, and simple to keep up should there be the requirement. Safety fencing and barriers are easily created using modular connectors, avoiding the requirement to weld pipe together.