MechChem Africa February 2017

⎪ Products and industry news ⎪

world’s most expensive paperweight.” At a timewhenmost peoplewere still battling to set the time on a VCR, they concluded and recommended to Apple that the world’s first palm-held, portable computer “was too far ahead of its time”. Doonesbury’scartoonistcreator,Garry Trudeau, made fun of it. But, Newton had an enemy much bigger than Garry Trudeau. Steve Jobs hated it. He raged against the device for its poor perfor- mance and novel input mechanism. “God gave us ten styluses,” he said, waving his fingers. “Let’s not invent another.” So, when Jobs wrested back control of his company, he scuttled it. As he ex- plained: “My gut was that there was some really good technology, but it was messed up by mismanagement. By shutting it down, I freedup somegoodengineerswho could work on new mobile devices. And eventually we got it right whenwemoved on to iPhones and the iPad.” Despite its relatively short life, the Newton and the thinking that went into it still resonate, existing in the devices you use today. New approaches to disciplines In the 6 June 2012 Princeton Alumni Weekly, the university stated that it “has long held that the study of engineering should be firmly embedded in a liberal education and that prospective engineers shouldhavebroadexposure to thehuman- ities and social science disciplines before theygraduate.AtPrinceton,weexpectour undergraduates to think deeply, but we also want them to roam widely, exploring a broad range of questions and approach- ing themfromasmany angles as possible.” In the words of Dean Vince Poor, “The most inventive and effective solutions often come fromunexpected interactions between disciplines. Today, the engineer- ing school is more likely to frame its work in terms of four broad areas of social need – energy, the environment, health, and security – than to define its mission using departmental metrics.” ‘Blurring’ is not isolated to engineering alone. The phenomenon is increasingly impacting on virtually everything in our business and social lives. ‘Renaissance’ thinking is gaining strength in the con- struction industry. Take, for example, the building of a typical middle-class South African residence. Trench foundations are dug and filled with concrete. Two-brick thick walls are built, with apertures for doors and win- dows being ‘bridged’ by reinforced lintels. Thereafter, a roof structure is erected, followed by awaterproof covering of tiles

A growing number of architects, materials manufacturers and builders are embracing new construction technologies such as light steel frame building.

or sheeting. Commonly, doorframes and window frames are of wood, the latter fit- ted with single glazing. Composite board ceilings are installed and painted. Walls are plastered then painted or tiled. A floor screed is laid, with a final surface finish of tiles, wood or carpet. When I returned to South Africa in 1994, after a stay ofmore than a decade in the United States, I paid a visit to the then head of a steel construction association. I asked about the type of home he owned. His reply was something like “a typical brick andmortar buildingwitha tiled roof.” I posed thequestionwhyhedidnot live in a building with a steel structure; seeing that hemanaged an industry groupwhose major objective was the increased use of steel as the major structural component. I never received a satisfactory answer. However, there are, thankfully a grow- ing number of architects, materialsmanu- facturers and builderswho are embracing new construction technologies such as light steel frame building. Not to be con- fusedwith ‘prefabricated’ or ‘kit’ building, it canbedescribedas ‘off-site’ building as a gooddeal ofmanufacturing takes placeoff site. Structural wall panels and trusses are assembled from cold formed, light gauge steel sections, which are taken to site for erection, typicallyon raft foundations, and claddingwithweatherproofmaterials.The

final result is an environmentally friendly and structurally sound building. From being virtually non-existent in 2012,lightsteelframebuildingtechnology is fast finding favour. It is now the fastest growing sector of the South African steel construction industry. And, it was heartening to note that the previous steel association head I visited nowlivesinabespokesteelandglasshome using light steel frame technology. Many other advanced construction materials and techniques are currently being researched or applied, with univer- sities such as University of Johannesburg and University of Pretoria leading the way.Materials range frommembranes for buildingenvelopes toaerated light-weight concrete, fibre-reinforcedconcrete,multi- use conduit, wall construction methods and virtually every product with potential to offer structural integrity, environmen- tal friendliness, ease of construction and economy for the life cycle. Interest is so fast-growing that an industry association has been planned to promote and guide development of this strategically important movement. And, as in most cases involving modern physical products, advances being made incorporatemulti-disciplinaryengineering components. Gary i. Crawford.

In the words of Dean Vince Poor, “The most inventive and effective solutions often come from unexpected interactions between disciplines. Today, the engineering school is more likely to frame its work in terms of four broad areas of social need – energy, the environment, health, and security – than to define its mission using departmental metrics.”

February 2017 • MechChem Africa ¦ 37