Rail Climbing System

Located at 46 Katherine Street in Wierda Valley, Sandton, the 21 000 m2 project is being developed by Alchemy as the new Bidvest head office, and is a key element of the new Katherine Street mixed-use precinct. The premium-grade development is within walking distance of both Sandton City and the Sandton Gautrain Station.
The Peri South Africa team on the project includes technical representatives Stephen Sprong and Sebastian Burwitz.
Peri Skydeck and Multiflex slab systems were selected due to the faster slab cycles achievable, a critical factor in this fast-track project. The balcony slab construction required complex back-propping, including the support of 6.5-m-high feature concrete walls.
These were realised using specialised Quickshore shoring tower up to 10m high, as well as a combination of GT24 Girders and SRZ walers. Peri Trio and Domino were deployed for the various retaining walls and upstand beams, which are repeated as a main feature throughout the building.
Fast and safe
The climbing systems used, in conjunction with the Vario GT24 wall formwork, consisted of specialised SRU, CB 240, and BR platforms, and an additional RCS-CL. “The RCS-CL has been developed specifically for cores in medium-height buildings with limited crane capacities and hook times,” Stephen points out.
Rail-guided climbing ensures that the climbing unit is connected securely to the building at all times, which makes the climbing procedure fast and safe, even in windy conditions. The units are moved by crane, or by means of mobile climbing hydraulics.
“The main benefit of the RCS-CL system is that there are reduced crane requirements for the core, a particular advantage on a highly-constrained site, which also frees up time for related construction activities,” he comments.
“Our main challenges on this project have been limited cranes, site space, and laydown areas. In addition, there was a specific requirement for concrete work with a high degree of accuracy, with an ultra-smooth finish on all vertical structural elements,” Stephen concludes.
Peri South Africa