Construction World March 2016

LSFB brings PEACE and BEAUTY STEEL CONSTRUCTION It has taken some time for the South African architectural industry to accept that light steel frame building (LSFB) is a construction method suitable even for complex and creative design. architectural and construction industries, it has also shown that an architect can design almost any building or structure and have it executed with LSFB. The most recent and example is the expansion at the well-known Boland farm Vrede en Lust of their function and wedding venue accommodation. This was built in a typical Cape Dutch style so that it would blend in with the existing buildings on the farm – some dating back to the early 1700. The owners decided that it should be a five-star facility, an energy efficient building with excellent acoustic insulation between rooms, top class finishes and, most impor- tantly, had to be built within six months as a turnkey project. The Silverline Group, one of the leading LSFB contractors in the country, was contracted for the structural engineering, the detail shop drawings, and the total construc- tion project including civil works and finishes. The project began on 4 May 2015 and the first wedding ceremony was successfully held at the venue on 7 November 2015, an incred- ible mere six months later. John Barnard, SASFA director says that the speed of construction possible with LSFB allows the facility to be in use that much quicker, thereby bringing in income long before it would otherwise have been possible with conventional building methods. “It is not only the speed of construction that saves money in the long term,” he says. “By using LSFB material wastage can be reduced significantly, transport costs slashed by up to 80% and the carbon footprint significantly reduced,” Barnard says. > Yet, in the recent past in South Africa, not only has this exciting building method become increas- ingly accepted in the mainstream

LSFB was used for the successful expansion of the luxury function and wedding venue accommodation at Vrede and Lust.

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“By using LSFB material wastage can be reduced significantly, transport costs slashed by up to

80% and the carbon footprint significantly reduced”.

In order to achieve the Cape Dutch design a special cobbling plaster, designed by Malherbe Rust Architects, was used. The building was finished internally with full skim plaster on 15 mm high impact Lafarge gypsum boards with 102 mm Cavitybatt insulation supplied by Isover. Charl van Zyl, CEO of Silverline Group, says that with fully skimmed ceilings in all bedrooms, down lighters were the perfect fit for the luxury room designs. Acoustic ceilings were fitted in the kitchen, front entrance and boardroom and restaurant. All bathroom walls were clad with fibre cement board and waterproofed, fully skimmed and painted. Van Zyl says that this was one of the most

He adds that LSFB is definitely much more energy efficient than more traditional construction methods, both with regard to ‘embodied energy’ of the materials and components, as well as ‘operational energy’ relating to heating and cooling of the building over its design life. At Vrede en Lust aluminium-zinc coated, high strength steel sheet was used for the light steel structure and was roll-formed on a Framecad roll-forming machine. The roof trusses were designed by Silverline Group using MITEK UltraSpan software. All windows were specified to be single-glazed aluminium frames – due to the high R-values of the insu- lated walls, double-glazing was not required.

CONSTRUCTION WORLD MARCH 2016