Capping Beams

RIX’s in-house form workers, steel fixers and concreters have years of experience in all types and shapes of concrete capping beam construction.

The function of a Capping Beam is two fold:

  1. To prevent or inhibit lateral displacement of the installed retaining piles or columns during the excavation process, and
  2. To transfer vertical structural loads from the building when constructed to the piles, columns or retaining structures, which can include shotcrete.

Shotcrete shoring traditionally requires piles, temporary ground anchors and capping beams.

Centre: This capping beam on the Ballina Bypass was formed after excavation and the installation of permanent soil nails and shotcrete. The bridge above was installed first and the excavation for the new road below followed with soil nail installed in top down-construction. The capping beam ties the top of wall together and allows for pre-cast panel installation.

Left: A top drain was skillfully cast into the beam by our Form Work Team. This has been one of the more complex capping beams as forming the beam at height and on top of an excavation is always challenging. Visible to passing motorists along the new motorway, our client was delighted with the quality of the capping beam our team delivered.

Right: This photo shows a recently poured capping beam, for a new high-rise project on the Gold Coast. Our team can be seen in the background stripping away the form work shutters for re-use in the next section. After the concrete reaches its designed strength, the earth adjacent to the beam will be excavated to reveal the piles, and temporary ground anchors will then be installed through the piles, which in turn will be shotcreted and finished to a rendered surface. This top-down sequence is typical for the shotcrete shoring process.