The Interlocking Joint Pipe is a non-watertight pipe for use in stormwater applications. The male/female type joint is formed inside the wall of the pipe meaning there is no widening of the pipe and therefore the outside dimensions of the pipe remain constant. The pipes are supplied in varying lengths.

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The rubber ring joint pipe is a watertight pipe for use in sewer applications where aggressive groundwater is kept out of the system, or aggressive system contents are kept within. The Spigot and Socket type joint is formed with a widening of the wall of the pipe on the one end. The pipes are supplied in varying lengths.

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JACKING PIPES (In-The-Wall Joint)

The in-the-wall joint pipe is a watertight pipe that uses a sliding rubber ring in the joint. The joint is formed inside the wall of the pipe, which makes this type of pipe ideal for jacking or tunneling operations. The pipes are manufactured in 2,44m and 1,22m but can be manufactured in special lengths to customers’ requirements.

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High-Density Polyethylene (HDPE) lined pipes offer the advantages of conventional concrete pipes as well as a plastic pipes as they are able to maintain shape under load and are inert to acid attack. They are ideal for large diameter gravity pipelines.

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Just like HDPE Pipes, Sacrificial Layer Pipes are used for sewer reticulation.  The exposed concrete in the joints of the pipeline needs to be protected against the corrosive gasses. The inside of the joint consists of Portland cement and Siliceous aggregates which will not give the same resistance to sewer corrosion as the sacrificial layer in the barrel of the pipe.

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Rocla wingwall units are used at both the inlet and outlet of a pipe system in both culvert and stormwater applications. The natural flow path of water upstream is wider than the culvert / pipe structure. Transition sections are therefore required in order to receive and direct the flow of upstream water through the culvert / pipe. The same transition elements are required at the downstream end of the culvert / pipe to return the flow of water to the natural width of the stream.

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Rocla’s portal culverts are used in stormwater applications, primarily in providing a waterway underneath the road. The unit consists of a deck and two legs and is placed on a concrete base. The culverts are supplied in 1.22m lengths and in 50S, 75S and 100S strength classes. Special strengths can be accommodated.

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In cases where time-critical installations of culvert crossings are required, Rocla’s precast culvert base slab is an ideal solution. It iss designed and profiled to suit the portal culverts already manufactured by Rocla.

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Rocla’s custom designed jacking culverts are the largest to be manufactured in South Africa. The customer required 3m x 3m custom-made jacking box culverts for a service delivery project. The culverts were manufactured with an in-the-wall joint that can be sealed with a rubber ring if required. They were used to create two 50m long under road tunnels, 6m below the road surface in order to provide new water services.


The SATS Portal Culvert is used in stormwater applications with high loadings to provide a waterway underneath a railway line. These particular culverts were designed for use by the South African Railways yet can also be used in applications where excessive fills need to be accommodated.

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A manhole is a working chamber installed at intervals along a pipeline in order to provide access to a pipeline. This is done for inspections and maintenance. The interlocking joint makes the installation quick and effective. Rocla’s manholes are supplied in lengths of 1000mm, 500mm and 250mm with varying diameters.

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The  airport manhole consists of a 1m chamber section with a 100mm cast in base. It consists of a specially designed manhole cover slab with a center opening and lid. The manhole is used vertically as an access shaft alongside runways where all the cabling of the runway lights come together.

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 Rocla has been given access to this amazing vehicle restraint system by its European counterparts who tested it extensively. It is made of prefabricated concrete elements. The system offers South Africa a road barrier that has performed to the highest levels in Europe and is more cost effective than road barriers on the market. The Rebloc in South Africa conforms to SANRALS standard profile requirements.

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The Rocla bus shelter was designed for commuters utilising taxi or bus facilities however is not only limited to this form of use. This virtually indestructible unit provides shelter from the sun and rain while providing seating for commuters.

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Rocla’s Beany Block system is simple and practical. Its excellent surface drainage efficiency together with its large flow capacity/unit ratio makes it superior to and more cost effective than conventional kerbing and drainage for certain roadway designs.  The Max Tech drainage system is laid level with the pavement surface enabling linear drainage anywhere within a catchment zone, which eliminates ponding.

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Rocla’s road side furniture and rubbish bins can be seen along main roads and picnic areas but are not only limited to this type of use.

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