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Philippine steel bar standards under review- The 19th China (Guangzhou) Int’l Plate metal, Bar, wire, Metal Processing &Setting Equipment Exhibition
4/13/2018 金屬板材展-棒材-線材展 -plate metal expo-wire expo |
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Manila Times reported that concerns over the use of quench-tempered or thermomechanically treated rebar should be focused on substandard manufacturing and not the product itself, industry representatives said. But structural engineer Emilio Morales, chairman of the Association of Structural Engineers of the Philippines wants builders to use microalloyed rebar instead, claiming that this is superior in terms of earthquake resistance and thus particularly suitable for the Philippines.
Asked to comment, a representative of SteelAsia Manufacturing Corp said the use of QT/TMT rebar should not be an issue given the country’s stringent standards.
SteelAsia Assistant Vice President Rafael Hidalgo told The Manila Times that “Quenched bars have been in the Philippines for decades and has never been an issue with structural engineers because they comply with the very strict Philippine National Standard 49.”
Mr Hidalgo added that “Almost all quenched bars sold in the Philippines are produced by ISO 9001 companies. The real issue is that there are still producers who fail PNS:49 and thereby endanger public safety. Market monitoring will show that these are repeat offenders.”
PNS 49:2002, which is the national standard for all steel bars used in concrete reinforcement, was developed by the Bureau of Product Standards’ Technical Committee on Steel.
Mr Hidalgo said that “[T]his has nothing to do with quenching systems which are made by the most modern metal technology companies in Italy and Germany.” He added that “Many ASEP members including past presidents are completely okay with quenched [rebar]. This has been going on for decades and they know too well the properties of quenched [rebar], that is why they buy it and install.”
The Philippine Iron and Steel Institute (PISI) likewise noted that QT rebar’s qualities have already been tested in a real-life situation.
PISI President Roberto Cola told The Manila Times in an email said that “Quenched and tempered rebars have been used in the Philippines since the 1970s. Structural engineers have been using it for high-rise buildings since then. In 1991, there was a strong earthquake in Metro Manila and the buildings that used these quenched and tempered bars were not affected.”
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