LSF Winning Projects (downloadable PDF version)
The 11-storey office building has a slick exterior, with varying window sizes in the elegantly curved façade walls. Several 2 and 3-storey office buildings at Summit Place, Garsfontein, Pretoria, had been successfully clad with LSF façade walls, with ETICS external cladding. Accordingly, it was no surprise when the architect, Boogertman & Partners, decided to use the same solution on the 11-storey office block, ‘Building E’, in the same development. In most of the earlier buildings, the architect specified slanting, ‘gravity-defying’ façade walls. With Building E, he decided to introduce curved façade walls, made possible by LSF. Saint-Gobain’s’ ETICS was used for the external cladding, as it is suited to curves, provides a durable external finish as well as insulating the office building to reduce the energy required for heating and cooling over the lifetime of the building. How does it demonstrate excellence in LSFB? It is fast to install, and accurate – all of the 700 premade external windows fitted into the allowed opening in the wall panels. The low mass of the LSF ETICS cladding eased logistics, and made handling on site a lot easier, requiring only a small team of artisans to do the installation. Due to the low waste factor, it has a small footprint in the building, allowing other trades to work in tandem.
This project uniquely captures all the benefits of LSFB, and hence it was selected to be a joint winner in the LSF Category of Steel Awards 2017.
Summit Place is the first South African high-rise office building where façade walls were constructed of LSF with ETICS external cladding. The 11 story office building incorporates 0.8mm LSF steel frames manufactured with window apertures. 60mm and 90mm thick EPS panels were used to form horizontal lines between windows and on the high upstand walls on the roof patio. Special considerations include fire breaks between floors, expansion joints levels 5 and 7 in horizontal application and more than 700 windows in design.
Architect: Boogertman & Partners
Structural Engineer: HAGE Engineers
Main Contractor: GD Irons
Structural Steel: HAGE Engineers
Steelwork Contractor: Ohlhorst Lightweight Building Solutions (Pty) Ltd
Steel Erector: Ohlhorst Lightweight Building Solutions (Pty) Ltd
Cladding Manufacturer and Supplier: Saint Gobain
Cladding Contractor: Ohlhorst Lightweight Building Solutions (Pty) Ltd
LSF Supplier: Clotan Steel (Pty) Ltd
Nominator: Clotan Steel (Pty) Ltd/ Saint Gobain