SPECIALIST CONTRACTORS OR SUPPLIERS
excavation; placement of the stabilised fill; and construction of the in-situ 10MPa concrete bases. Constructed in sound founding material, the concrete bases for the front raker beams and front columns are 500 mm thick. Work started with the installation of the middle precast-concrete elements. The top of the columns was set out with coordinates to confirm the plumb and position. This was followed by the lining up of the front raker beams with the top and bottom bolts of the columns and then fastening them in place. Corestruc then installed the rear columns, again setting out the top of the precast-concrete elements with coordinates to confirm the plumb and position. The columns were then braced with structural steel. This provided the critical stability that was required at this stage of the erection process, considering the slenderness of the columns. The top raker beams were then installed in the same way that the front elements were placed. Afterwards, they were braced horizontally in a similar sequence to that used for the back columns. This was followed by the placement of the many seating benches. Corestruc’s team achieves tolerances of 3 mm when connecting the precast-concrete elements to the foundations and 5 mm when integrating the other components of the system. Infinite Consulting Engineers and Corestruc have been refining and perfecting this modular system
since 2012. The focus has been on designing an “off- the-shelf system” that reduces erection time and only requires minor design modifications – if necessary. This has been achieved by standardising and reducing the number of prestressed precast-concrete elements, while the use of curved columns and flat surfaces for the rakers, benches and side panels has also facilitated quick and efficient installation. Infinite Consulting Engineers has also refined the method of connecting the various precast-concrete elements over the years. The columns are connected to the in-situ bases by components that have been cast into the precast concrete elements and secured using hold-down bolts in the base.
• Company entering: Corestruc • Client: Blouberg Municipality • Start date: 22 September 2021 • End date: 7 March 2022 • Main Constractor: Chisa Multi Projects • Consulting Engineers: Sizeya Consulting Engineers PROJECT INFORMATION
52 21 st Best Project Awards 2022
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