With an average rainfall less than half that of the world's annual average, water is not something South Africans can afford to throw away. The country is fast approaching a time when demand for water will outstrip supply. Gauteng could even run out of water as early as 2013, according to former Water Affairs and Forestry Minister, Lindiwe Hendricks, in late 2008. And even if the central water supply does hold out, will we still be able to trust its quality, after the damning reports released to the media about the dubious state of our drinking water?
Road surfacing industry suggests greening its footprint for sustainable development
Basil Read commits to energy conservation
Bohler Plumbing harvests rainwater and freezes pipes
Water filtration systems guarantees removal of 99,9% of hydrocarbons
Water and energy - ingredients for industry
Save the trees... Use more (of the right) paper
Chand to ensure Cape Town film studios goes green
Prevent corrosion for up to 40 years with Mapeshield
Pilot Crushtec's flexibility crushes production costs
Consultants tackle energy issues at universities
Talisman Plant & Tool Hire expands with three new stores
As an engineering graduate, you have cleared the first hurdle - your degree or diploma. However, that is only the beginning. As you know, the long road to ECSA registration still lies ahead - but help is at hand!
Pictures showing pumped concrete for a bridge deck drew my attention to the article by AfriSam in the June 2010 edition of Civil Engineering. I duly read through the article and noticed the proud claim that, "The 460 m3 concrete pour at the Nellmapius Bridge centre span deck was completed in an astounding 13 hours."
Reply by Etienne de Villiers to the three letters published in the June 2010 edition of Civil Engineering (pp 86-89), which had been written in response to his original letter published in the March 2010 edition (p 77).
The recently published SANS 10160-2010 Series (Basis of structural design and actions for buildings and industrial structures, and consisting of Parts 1 to 8) will serve as a new standard for the general principles for the structural design of buildings and similar industrial structures, and the actions (loads) to be considered.
The planning aspects concerning layout, aesthetical and functional considerations of the RAU are given. Construction time was limited and the im plications thereof are discussed. The geological formation of the site is treated. A selected number of structural aspects are descriptionbed, eg torsion and relative displacements of post tensioned edge beams and several problems associated with columns consisting of a precast concrete shell and in-situ concrete cores. For the laboratories, the structural system as well as vibration considerations are briefly discussed. The structural solution for the roof to the grandstand of the main sportsfield is shown.
The stated aim of the paper was to provide for the nongeophysicist an up-to-date introduction to the usefulness of land seismic surveys in civil engineering. Applications of the seismic refraction method in depth-to-bedrock studies, excavation problems and geotechnical work were discussed and indications of the limitations were given. Emphasis was on the use of the results rather than on their collection and so, except where relevant, no mention was made of the principles and field practice of seismic surveys.