A kerb is an edge which is used to define limits of access. They are mostly used on roads and highways to show the carriageway boundaries by creating a barrier between pedestrians and vehicles. There are various kerbings used in commercial road construction. Here are some of the major types you may find interesting.
- Extruded Kerbs – The extruded types of kerbs are usually found on straight roads such as dual carriageways, motorways as well as highways. The kerbs are made through the use of a laying machine which moulds concrete to the desired shape. The Extruded concrete kerbs are afterwards laid using a slip-form paver which eventually places the kerb as it slowly moves along the road.
- Natural Stone Kerbs – When it comes to the construction of natural stone kerbs, granite is mostly preferred due to its popularity. However, other stones can also be used. These include sandstone, gabbro as well as basalt. One of the chief benefits of natural stone kerbs is that they are very durable. This, however, makes them more expensive than the other kinds of kerbs. When trying to replace natural stone kerbs that have lived for a long time, you may experience challenges as they were usually placed in random sizes. That, however, has changed as new stone kerbs come with a uniform profile as well as an exceptional finish.
- Pre-Cast Concrete Kerbs – The pre-cast concrete kerbs are the most common on our highways because of their outstanding physical and structural properties. The kerbs are cheap to manufacture and install. They are also firm which means they can withstand immense impact from vehicles. The pre-cast concrete kerbs are also produced with strict adherence to tolerance. This means that they can face a lot of difficult conditions which in one way or the other might compromise their structure.
- Angles and Quadrants – The angle and quadrant kerbs are manufactured to add corners, bends and curves to the radius and straight kerbs. Such kerbs come in a variety of sizes and angles which can be used to tackle any shift of direction during kerbing.
- High Containment Kerbs – The high containment kerbs come in much bigger sizes when compared to regular kerbs. They are used in the prevention of traffic from getting past the carriageway. The kerbs can be spotted on pedestrian islands, dangerous curves or even footpaths. Their size and strength can hold a speeding vehicle from crossing over to restricted areas.