Aug 2019 TYPES OF CONCRETE BOLLARDS
Sephaku Cement discusses precast concrete traffic bollards, what they are used for and how they are most commonly installed.
Not a common point of conversation, but still a topic of interest for concrete and cement crafters, traffic bollards are fitted as three different installations namely; surface mounted, embedded and rebounding or retractable/removable concrete barriers.
Installed in different areas and each with a specific purpose, concrete traffic bollards can be found in parking lots, as a protective measure in high pedestrian areas and to direct traffic or to deter unwanted parking. Some of these concrete barriers may include lighting or can also be fitted as decorative concrete bollards, adding a somewhat ornamental accent to more aesthetic areas where others simply serve as a blockading purpose.
Learn how to differentiate between the three variations of concrete traffic bollards:
- Surface Mounted Traffic Bollards and Concrete BarriersAnchored into place with heavy duty bolts, precast concrete bollards and barriers are mounted onto desired surfaces and can typically be found as a deterrent to unwanted parking and driving, protecting high pedestrian zones or other areas of interest, as well as protecting beauty such as park fountains or statues. While commonly fitted in a variety of locations, this method is not known to be the strongest or most secure means of deterrence – if struck hard enough the precast concrete bollard can become dislodged, uprooting its anchor system and potentially causing damage to its foundations. While surface mounted concrete bollards may not be a fool proof way of preventing high impact entry, these concrete installations do serve as an effective and affordable “psychological” barrier to unwanted entry.
- Embedded Concrete BollardsWhile once again making use of precast concrete bollard moulds, embedded concrete bollards are typically installed during the foundation phase of a construction project. Sinking the concrete (or in other instances steel or wood bollards) into the foundation, while effectively burring a portion of the bollard for added reinforcement. Depending on materials used during the installation (wood versus steel), an embedded bollard can be a more effective solution to that of its mounted counterpart. Keeping in mind this installation will only be as strong as the foundation it is fitted into, much in the same as a surface mounted option, embedded bollards offer an excellent barrier and deterrent to entry, protecting earmarked areas. Concrete bollards can also be used very effectively to demarcate walking paths.
- Retractable and Removable BollardsAlthough this type of bollard is not typically cast from concrete but rather a hollow steel tube, its foundation is usually fitted with concrete for lasting durability and alignment. The purpose of a removable or retractable bollard is to inhibit entry during certain times and allow access during others. Installed using a manually removable pipe-in-a-tube or a pivoting method, retractable barriers can also come as a more costly removable bollard fitted as a hydraulic, automatically retractable version.Whether installed as a means of traffic denial, to indicate drive-thru lanes or as pedestrian or parking lot protection, precast concrete bollards are extensively used in and around a number of civil engineering projects, park maintenance and under some instances residential home improvements.