Bollards are used in a number of applications, for one of several purposes. You need only to keep a sharp eye to view bollards around us every 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 usage of undesired areas. In factories and warehouses, bollards are very important for safeguarding pedestrians along with guarding storage racks and capital equipment from fork truck collisions.
Other industries which find a heavy usage of steel traffic bollards include automated car wash facilities, self-storage facilities, gas stations and convenience stores, propane dispensing, and parking garages, and others.
Foundation mounted bollards are usually placed in among two ways. The initial, most affordable way, is by using a plate mounted bollard. These bollards are steel pipes welded to a flat steel plate that can be anchored to some hard surface using concrete anchors. This technique 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 for this installation method, when used in combination with a rigid bollard, is that the anchors are usually not strong enough to stand up to anything over 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 second technique for installing bollards involves utilizing a longer steel pipe and burying a portion of it deep in the earth. This method provides the bollard far more strength than surface mounted, however it could be very expensive to put in if the surface is concrete and already poured. Installation in this case requires coring a hole within the surface using an expensive diamond bladed coring saw. These appliances as well as their blades are expensive and require water cooling, making a mess during installation. When the concrete is cored and also the bollard is within place, the hole must be backfilled with concrete to secure the bollard. For more strength, these bollards are often filled with concrete, as well. Though the bollard pipe is relatively inexpensive, this installation technique is costly and time consuming.
Although quite strong, you can find significant disadvantages to core installations. Above all, there is not any give to this method upon impact. Though desired in high security applications, any vehicle impacting this type of bollard is going to be significantly damaged as well as its passengers in danger of injury. Loads carried by fork trucks can be thrown due to the jarring impact very likely 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 improve. Frequently the steel bollard itself is beyond repair and should be replaced having an entirely new bollard.
Another drawback to this sort of installation is it is actually a permanent installation with little flexibility for movement. In factory applications, tools are often moved and rearranged. Bollards utilized to protect equipment or storage racks which are core-installed usually are not easily moved. The concrete around the bollard has to be broken out and the large remaining hole filled, leaving a factory floor full of unsightly patches. When the bollard itself is reusable after removal, the entire expensive installation process is started over on the new location.
Some designs happen to be developed to try to solve these complications by using plastic or spring loaded bollards, however these designs suffer from an absence of strength. If the plastic is of insufficient stiffness, the complete function of access denial is lost. On the contrary, very stiff plastic designs have experienced difficulty with long-term durability. Minor collisions tend 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 actually a unique system which solves lots of the problems related to traditional foundation mounted bollards. To put it simply, the program works with 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 attached to concrete using concrete anchor screws. These anchors affix the base component on the adapter, which pre-compresses the elastomer against the ground. The base and adapter pieces are made of a special ductile cast iron, which makes the pieces less brittle than typical cast iron, and also has a really low (-40 degrees) brittleness temperature. The steel pipe which may serve as the bollard post is really a typical steel pipe inserted in to the adapter. Standard pipe is used to offer the conclusion user the flexibleness to weld fencing using standard components if needed. Concrete fill is not needed within the bollard pipe, though is permitted. In fact, sign posts may be inserted into the post and concrete completed place.
Upon collision, the pipe and adapter are permitted to tilt inside the base, forcing the adapter to further compress the elastomer toward the impact. The elastomer absorbs a lot of the energy from the impact and lengthens the deceleration period of the vehicle. The elastomer is of sufficient strength to then rebound, usually pushing the automobile out of the bollard and returning to a vertical position. The tilt of the pipe is restricted to approximately 20 degrees at which point the bollard can become rigid.
Bollards are designed in a selection of sizes, each of that is suitable for various expected collision speeds and masses. Further, modular connectors which may be used to create fencing and guards out of multiple base units have been created to eliminate welding. By making use of multiple base units, the ultimate strength of the rebounding bollard unit may be increased.
These new bollards utilize the much easier way of surface installation, greatly reducing installation costs, while keeping the flexibility to move bollards as conditions warrant. This can be accomplished minus the normal downside of absence of strength, because the elastomer inside the bollard system greatly reduces the maximum impact forces applied to the base anchors. The reason being deceleration of the impacting vehicle is much less severe than during an impact using a rigid bollard. Energy is transferred to the elastomer instead of straight to a rigid post, lowering the harsh impact of the relatively immovable object.
This leads right to the most significant features of the newest bollard system and that is the lowering of harm to both offending vehicles and also to the bollard system itself. Direct harm to vehicles is reduced due to the reduction of peak impact force seen by the vehicle. Not only will this avoid injury to the car, but the probability of injury to a passenger is likewise reduced. When it comes to a fork lift in a factory or warehouse, the chance of a thrown load can also be reduced, avoiding the potential for bystander injury and stock loss.
Finally, injury to the bollard as well as its foundation is reduced. Since the post is constructed of strong steel pipe, it maintains its strength, but due to its forgiving nature, significantly less force is moved to the foundation. This simplifies and eliminates maintenance while preserving an great looking facility.
These bollards must be installed on concrete, being an asphalt surface is not of adequate strength to anchor the bollard system. Thinking about the replacement costs of damaged bollards, however, it might be cost effective 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 when it comes to mass and speed. Should that limitation be exceeded, it really is possible to break a part of the program. Most likely which involves the post, adapter, or base. Fortunately, the program 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 could be replaced by carefully eliminating the concrete screw anchors and replacing the component.
The SlowStop Bollard system is a progressive cool product which solves lots of the problems involved with bollard collisions as well as installation and maintenance issues. Injury to vehicles, passengers, vehicle loads, and also the removable bollard sleeve themselves is cut down tremendously due to the 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 set up, flexible because they are easily moved, and simple to keep if there is the need. Safety fencing and barriers are easily created using modular connectors, avoiding the need to weld pipe together.