The Civil Engineering Contractor November 2018 | Page 27

TECHNOLOGY SKYDECK and MULTIFLEX slab systems were selected due to the faster slab cycles achievable — a critical factor in this fast-track project, which aimed to top-out by August. The balcony slab construction required complex back-propping, including the support of 6.5m-high feature concrete walls. 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 leading with limited crane capacities and hook times,” technical representative Stephen Sprong points out. “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 freed up time for related construction activities,” Sprong 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.” Importance of BIM further strengthened PERI has been one of the leading companies in the construction industry for many years regarding the integration of BIM, and it can already boast a number of international project references that have been successfully developed together with customers using BIM principles. The most recent example is the Saldanha MOGS project — the largest project in the history of PERI South Africa, which is being completely realised using BIM methods. For this project, PERI has been supplying formwork and scaffolding materials for the construction of an oil storage facility consisting of 12 underground circular tanks with a capacity of 13-million barrels of crude oil. Each tank has the footprint of two football fields and is 17m high. nn References TECON Self-climbing system TSC80 is a crane-independent climbing formwork system and can be used for high-rise buildings and bridge pylons of any of shape and height. PERI technical representative Stephen Sprong. www.civilsonline.co.za • Müller, H. (1972). Rationalisierung des Stahlbetonhochbaus durch neue Schalverfahren und deren Optimierung beim Entwurf. (Doctoral Dissertation), Universität Karlsruhe. • Rathfelder, M. (1992). Moderne Schalungstechnik, Grundlagen – Systeme – Arbeitsweisen. München, Germany: Mi-Wirtschaftsbuch. • Hoffmann, F.H. (1999). Schalungstechnik mit System. Berlin, Germany: Bauverlag. • Reichle, E. (2002). Einflussfaktoren für Aufwandswerte bei Schalarbeiten. TIEFBAU, 114 624–626. • Girmscheid, G. (2011). Rational schalen. Der Bauingenieur, 11, 50–51. CEC November 2018 | 25