Saturday, March 21, 2009

Safe Building Construction


Are high rise buildings in Male' constructed to safety standards? We realise that the designs have been subjected to much scrutiny by the government since Mr. Riffaths time at OPPD. Unfortunately we still get approved drawings which are full of contradictions! worst of all; adherance to design is left to developer who will disappear after the 10 year lease period expires!; so be careful when you by cheap steel! it may not support the weight!!!

"All reinforcing bars(concrete strengthening steel) must be purchased based on the properties of yield strength, tensile strength and elongation values. To ignore these will only be putting your construction at peril. Many civil engineers, even today, assume that ‘TMT’ bars have yield strength of 415 N/mm2 but better elongation than CTD bars. He should know that nothing in the current Indian laws ( i'm using indian steel!!) or regulations prevents the rolling mill to just sell untreated and untwisted deformed bars as TMT bars - even though the strength can be as low as only 300 N/mm2.



"Dr. C. S. Vishwanath of Bangalore and his colleagues have done pioneering work in study of the various “TMT” rebars available in the country today and have published many articles on the subject. His team has already warned the users about how many mills are flooding the market with sub-standard and defective “TMT” rebars. They have found many “TMT” bars of the main producers and secondary mills with a Yield Strength in the range of only 350-390 N/mm2. This only strengthens my worry that some civil engineers today assume all rebars are of Grade Fe 415 and so avoid testing."