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CMA NEWS AND MEMBER ARTICLES

CMA News & Articles - The CMA is the precast concrete industry association of South Africa. Find our members on our website to source quality precast concrete products, professional built environment service(engineers, architects, contractors and more).

MTN data centre extension roofed with echo prestressed holow-core slabs

Echo prestressed hollow-core slabs have been used to roof a second storey added to MTN’s Data Centre in Centurion, Gauteng.

The extension followed the use of Echo slabs to roof the original single-storey building built in 2012. The second storey has been built on the prestressed slab roof of the original structure. Grinaker-LTA was the main contractor and DSM Consulting Engineers was the engineering consultancy involved.

The prestressed roof slabs are 250 mm deep with spans of between of 2,2 m and 11,5 m. They are designed to carry live loads of 10 kN/m² and dead loads of 2,5 kN/m². They are mounted on precast inverted T-beams measuring 420 mm deep and 630 mm wide, which Echo subcontracted to ENCON to design and Civilcon to manufacture.

The beams have been installed on 6,5 m high reinforced cast-in-situ concrete columns, most of which feature rebar that protrudes through the slab roof to support solar panels and other plant to be mounted on the roof.

A lightweight politerm screed-to-falls has been installed over the slabs, followed by a second screed covering to take a dual layer of waterproofing.



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