House Rakowsky is a new residence designed by Pr.Engineer Mark Labrum in Grotto Bay, an easily accessible coastal bay close to the Grotto Bay Private Nature Reserve, on the R27 south-west of Darling, less than an hour out of Cape Town. The area is famous for its biodiversity; development is still allowed but in a sustainable and more controlled way, ensuring a better balance of society and environmental protection.
Cobute supplied its precast beams and decking system (H250) as well as additional steel, as specified by the Engineer. Over the years, the Cobute beams have proven to be easy to install since the system only requires only minimal shuttering, speeding up the site deliverable while minimising timber waste, which would otherwise go to landfill. The system was tested for failure by the Department of Engineering at UCT; even though the test results demonstrated no significant difference to conventional beams for shear strength, they did, however, show better performance in bending moment capacity (reaction induced in a structural element when an external force or moment is applied to the element causing the element to bend). When coupled with the flexibility in size manufacturing and time savings on site, the Cobute beams prove to be the most efficient beam system on the market.
The Cobute slab consists of interlocking ribs and panels, topped by polystyrene blocks cut to size. The use of polystyrene plays an important role, as it decreases the amount of concrete cast, which dramatically contributes to ensuring a light structure; it also assists with acoustic and thermal insulation. Cobute can supply galvanized boxes cast in the panels, to ease the installation of light points.
Get in touch to get a proposal on the Cobute systems for your project or should you wish to include these precast elements in your design.