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ADVERTORIAL: COVER STORY
From page 10
“
This project showcases how flexible Ultra-Span LSF steel is.”
– Uwe Schlüter, MiTek
flexible Ultra-Span LSF steel is and how it makes it possible to design and erect a complex roof safely, cost-effectively and on time.”
He adds that this is only possible if the contracting company has the requisite skills.“ In this regard, I must commend EcoStruct’ s Jacques Cloete who designed this structure on the MiTek 20 / 20 roof design and engineering software with full 3D resolution, which certainly helped to achieve all the complex curves and roof lines,” Schlüter says. The result is an extremely lightweight 3 250m ² roof structure using only 8.7kg / m ² of LSF sections, roll-formed using ArcelorMittal’ s high strength galvanised steel sheet. This means a total mass of just 28.3 tons of LSF was used for the entire roof structure.
John Barnard, Southern African Light Steel Frame Building Association( Sasfa) director, says that one of the keys to this project is the assembly of‘ clusters of trusses’ on the ground, which significantly increase the safety of the process. The process was quicker as the trusses were lifted by a mobile crane with a long reach.“ The combination of low mass, safety and speed translates into costeffectiveness,” he says.
To achieve this, EcoStrut used a 160-ton mobile crane with a long reach capability, enabled the erector to lift simultaneously five pre-assembled braced roof truss clusters into the final position.“ Therefore, it took only one day to lift all 46 trusses of the main roof into position therefore greatly reducing the total time spent on site,” Barnard says.
The mobile crane used to erect pre-assembled braced roof trusses.
The material was light which translates into a smaller mass for the entire structure. www. ecostrut. co. za A team that had the requisite skills helped to successfully complete the project.
12 RESIDENTIAL
MAY 2018