Bollards are used in a myriad of applications, for one of various purposes. You need just to keep a sharp eye to see bollards around us every 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 usage of undesired areas. In factories and warehouses, bollards are important for protecting pedestrians as well as guarding storage racks and capital equipment from fork truck collisions.
Other industries which locate a heavy use of steel 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 typically installed in among two ways. The very first, most inexpensive way, is to use a plate mounted bollard. These bollards are steel pipes welded to your flat steel plate which can be anchored to some 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 on the bollard with expansion or screw anchors.
The down-side to this particular installation method, when used with a rigid bollard, would be that the anchors are generally not strong enough to stand up to anything greater than a minor collision. The plate anchors often are pulled up and possibly the plate bends, leaving a post which leans and is no longer able to properly serve its purpose. Plate mounted bollards often require constant maintenance and replacement.
The second technique for installing bollards involves utilizing a longer steel pipe and burying a portion of this deep in the ground. This technique affords the bollard far more strength than surface mounted, however it can be very costly to put in in the event the surface is concrete and already poured. Installation in this case requires coring a hole within the surface utilizing an expensive diamond bladed coring saw. These appliances along with their blades are costly and require water cooling, making a mess during installation. When 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 filled with concrete, as well. Even though the bollard pipe itself is relatively inexpensive, this installation technique is costly and time-consuming.
Although very strong, there are significant disadvantages to core installations. Most significantly, there is no give this technique upon impact. Though desired in high security applications, any vehicle impacting this type of bollard is going to be significantly damaged along with its passengers vulnerable to injury. Loads carried by fork trucks can be thrown due to the jarring impact likely to occur. Further, the bollard or its foundation can be damaged by this kind of impact, again leaving a tilted and less effective barrier requiring costly maintenance to fix. Frequently the steel bollard itself is beyond repair and must get replaced with an entirely new bollard.
Another disadvantage of this type of installation is that it is 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 that are core-installed are not easily moved. The concrete all around the bollard has to be broken out and the large remaining hole filled, leaving a factory floor filled with unsightly patches. If the bollard itself is reusable after removal, the entire expensive installation process begins over on the new location.
Some designs have already been created to try to solve these issues through the use of plastic or spring loaded bollards, however these designs are afflicted by too little strength. If the plastic is of insufficient stiffness, the entire purpose of access denial is lost. On the contrary, very stiff plastic designs have experienced difficulty with long lasting durability. Minor collisions have a tendency to wear away at such devices, as well as in outdoor applications UV degradation turns into a concern.
Designed and patented in Europe by Belgian inventor Gerard Wolters is actually a unique system which solves lots of the problems related to traditional foundation mounted bollards. Simply put, the device works with a compressed rubber base to behave 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 technique is connected to concrete using concrete anchor screws. These anchors affix the base component over the adapter, which pre-compresses the elastomer up against the ground. The base and adapter pieces are made of an exclusive ductile cast iron, making the pieces less brittle than typical cast iron, and has a really low (-40 degrees) brittleness temperature. The steel pipe which serves as the bollard post is actually a typical steel pipe inserted to the adapter. Standard pipe is used to give the end user the flexibleness to weld fencing using standard components if needed. Concrete fill is not needed inside the bollard pipe, though is permitted. Actually, sign posts can be inserted to the post and concrete filled in place.
Upon collision, the pipe and adapter are allowed 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 power in the impact and lengthens the deceleration time of the car. The elastomer is of sufficient strength to then rebound, usually pushing the automobile away from the bollard and returning to a vertical position. The tilt of the pipe is limited to approximately 20 degrees at which point the bollard can become rigid.
Bollards are designed in a selection of sizes, every one of that is appropriate for various expected collision speeds and masses. Further, modular connectors which could be used to create fencing and guards out of multiple base units happen to be designed to eliminate welding. By utilizing multiple base units, the best strength from the rebounding bollard unit can be increased.
These new bollards utilize the much easier way of surface installation, greatly reducing installation costs, while keeping the flexibility to maneuver bollards as conditions warrant. This is accomplished minus the normal drawback to absence of strength, because the elastomer in the bollard system greatly reduces the maximum impact forces applied to the base anchors. The reason being deceleration of an impacting vehicle is much less severe than throughout an impact having a rigid bollard. Energy is transferred to the elastomer instead of right to a rigid post, reducing the harsh impact of any relatively immovable object.
This leads directly to the most important advantages of the brand new bollard system and that is certainly the lowering of harm to both offending vehicles as well as the bollard system itself. Direct harm to vehicles is reduced due to the decrease in peak impact force seen through the vehicle. It will not only avoid harm to the car, but the possibility of injury to a passenger is likewise reduced. With regards 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, harm to the bollard and its foundation is reduced. Because the post is constructed of strong steel pipe, it maintains its strength, but because of its forgiving nature, a lot less force is transferred to the foundation. This simplifies and eliminates maintenance while preserving an great looking facility.
These bollards must be installed on concrete, as being an asphalt surface will not be of adequate strength to anchor the bollard system. Taking into consideration the replacement costs of damaged bollards, however, it might be cost effective to pour a concrete pad and eliminate years of costly maintenance and asphalt repair. As earlier mentioned, each bollard is sized for expected loads with regards to mass and speed. Should that limitation be exceeded, it is easy to break a element of the program. Probably that involves the post, adapter, or base. Fortunately, the program is modular and simply repaired. Posts can 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 taking out the concrete screw anchors and replacing the component.
The SlowStop Bollard system is a revolutionary new product which solves most of the problems associated with bollard collisions as well as installation and maintenance issues. Injury to vehicles, passengers, vehicle loads, as well as the removable steel bollards themselves is greatly reduced because of the absorption of impact energy by an elastomer hidden in the lower bollard. This elastomer allows the bollard to tilt when impacted and return upright afterward. SlowStop Bollards are quick and inexpensive to install, flexible as they are easily moved, and simple to keep should there be the necessity. Safety fencing and barriers are easily created using modular connectors, avoiding the requirement to weld pipe together.