MA rebar, meanwhile, involves the use of alloying materials such as vanadium and carbon during the production process. “Microalloyed rebars began disappearing in the market when most major local manufacturers completely shifted to QT/TMT rebars,” his paper claims. Now if you compare buildings with MA rebars and QT rebars, most likely the buildings reinforced with QTs may not afford that enough time for the safe evacuation of occupants,” he claimed. “There is, indeed, clear and present danger associated with the use of QT rebars in Seismic Zone 4 which encompasses the majority of the Philippine islands except Palawan. She said the country’s construction regulations should also prohibit the use of QT rebar, especially in high-rise buildings.

Source: Manila Times April 09, 2018 16:07 UTC