JOINT WINNER: SAINT-GOBAIN LIGHT STEEL FRAME CATEGORY House De Clercq and Cottage, Mount Verde, KZN Judges Comment: We have had many houses entered into Steel Awards since we started this category but surely this house has by far highlighted all those wonderful attributes that makes the LSFB product special. Photographer: Barcode Media Set in an agricultural estate, surrounded by sugar cane, cattle grazing and the like, the house is described as a perfect example of what light steel frame building methods are designed for. It does not look like a LSF house trying to look like a brick home. Early involvement of the contractor with the design team enabled them to push the limits of LSFB. Even the industry strikes in July did not delay handing over the 900 square metre house as promised for by December 2014. With a clever mix of a LSF system, with plated LSF beams and some hot rolled steel they were able to achieve the client s desire for an industrial look with thin sharp lines to produce a top-of-the-class beautiful up-market home. Some of the outstanding features: Hot-rolled steel: Structural steel H-beam forms the structure of the centre living area, main facade and three patio areas. A mono-pitch roof structure required 1 250m 2 of roof sheeting and necessitated varying heights of LSF walls. Exposed LSFB construction, finished in black paint. Even in the double garage there is exposed LSF in its original galvanized finish with a light steel frame storage rack hanging off the roof such a simple practical idea! Large glazed openings to capture the stunning view. Glazing and opening sizes Steel Construction Vol. 39 No. 5 2015 45
No direct water or electrical supply was available for the first four months on site thus water tanks and generators were required. As LSF is a dry building system minimal water was required during this stage. were a challenge as the client wanted maximum clear views and wide opening spans. Luckily this was achievable using a combination of doubling up LSF beams and plating them with 1,0mm galvanized sheet and L-headers. Part of the feeling of openness is an indoor-outdoor Koi pond with a glass shop front partly submerged into the water. Exterior wall cladding was done with some flat fibre cement board with a fine texture plaster finish and imported Shera plank tongue and groove. Interior walls were cladded with Gyproc 15mm Firestop boards and 102mm cavity batt insulation in the wall cavity. And finally to complete this perfect picture of a stunning house and a spectacular view - a garden filled with indigenous plants and rock walls built from the rock found whilst levelling the site. PROJECT TEAM Client: Kim and Paul De Clercq Architect: Earth Energy Architecture Structural Engineer: Martin & Associates Project Manager, Main Contractor, LSF Contractor and Cladding Erector: Shospec (Pty) Ltd Steelwork Contractor: Barnmaster Detailing Company: Steel Frame Developments (light steel frame roll former)/ Martin and Associates & Barnmaster (for structual steel ) Cladding Supplier: Capco Little Africa Parys Farm House STAND ALONE HOUSES PROJECT TEAM Client: Michelle & Johan Huyser Architect: De Raedt Designs Structural Engineer: Donnic Project Manager: Main Contractor: LSF Contractor: Detailing Company: Cladding Supplier: Cladding Erector: Foundation: Melwic 46 Steel Construction Vol. 39 No. 5 2015
JOINT WINNER: SAINT-GOBAIN LIGHT STEEL FRAME CATEGORY Mediclinic Midstream, Centurion Judges Comment: This project illustrates all the beneficial aspects of steel formability, guaranteed high strength, low mass, straight and true elements, narrow tolerances, ease of transport, handling and erection, with life-long corrosion protection supplied by the thin zinc coating. And to top it all the cost of the light steel roof structure was 50% lower than timber trusses! Photographer: Uwe Schluter It is a pity that the patients can t appreciate the light steel roof structure of the Mediclinic Midstream in Centurion. Nevertheless the story is an excellent advertisement for light steel frame roofing. Due to the early involvement of the LSF contractor and profile supplier, the architect was convinced that the design should include a LSF roof structure to reduce the total load effect on the supporting structure. The Ultra-Span (a pre-fabricated light gauge steel roof truss system) roof structure covered 9 100 square metres of the roof and weighed in at almost 45 tons of steel. This comes to just below 11 kilograms per square metre which is very light considering some of the roof trusses span 19 metres with considerable live load requirements. The design allowed for supporting 100mm thick FBI insulation between the truss top chords and the purlins. The large span-deep Ultra-Span trusses were assembled on site eliminating transport problems of the large components (smaller units were assembled in the factory). Four of these large trusses were assembled into braced roof sections before hoisting them into position by the site tower cranes. This combined process ensured overall 50 Steel Construction Vol. 39 No. 5 2015
PROJECT TEAM Client: Mediclinic Architect: Graceland Architects Structural Engineer: Cibucon Structural Engineers Quantity Surveyor and Project Managers: TMS Quantity Surveyors Main Contractor: Basil Read Detailer, Supply of Profiles: Ultra-Span LGS- MiTek Industries South Africa (Pty) Ltd LSF Contractor: Ultra-Span LGS- MiTek Industries South Africa (Pty) Ltd Hi-Tech Nail Cladding Contractor: Rainbow Sheeting completion in just five months despite the weather s best efforts to interfere. Judges comment This project illustrates all the beneficial aspects of steel formability, guaranteed high strength, low mass, straight and true elements, narrow tolerances, ease of transport, handling and erection, with lifelong corrosion protection supplied by the thin zinc coating. And to top it all the cost of the light steel roof structure was 50% lower than timber trusses, and 30% lower than what welded heavy steel trusses would have cost! No wonder that the use of light steel roof structures such as Ultra Span is growing rapidly, replacing timber, and even competing with heavy steelwork in certain cases! 52 Steel Construction Vol. 39 No. 5 2015