Xi ' An hundred black enterprises pull fine steel bar building pull thin a millimeter profit staggering

Xi ' An hundred black enterprises to pull a ton of steel reinforced concrete one-millimeter more than a millimetre to earn nearly thousand yuan steel "thin body" to reduce the seismic performance of buildings due to building quality problems aroused widespread public concern about the "building brittle", "building crack" and so on a series of building safety problems still make people feel indignant, Xi ' an city, some construction sites recently appeared with the Super pull "slimming "The phenomenon of steel building, once again touched the vast number of owners and ordinary people's sensitive nerves."　　Knowing that the reinforcement can not guarantee the quality of the building, but the resulting profits still make the unscrupulous construction enterprises and rebar processing enterprises regardless of the owner's safety. Present situation the steel bar is not enough. The law enforcement officers of the twin branch of Xi ' an Bureau of Commerce and Industry recently found in XI ' an some steel factory inspection, many processing plants will be specifications diameter of 10 mm, 8 mm of steel to pull down to 9 points, 6 points a few millimeters. And these processing plants are mostly without any formalities of the "Black processing plant", the annual production volume is not low.　　Located in Chan Ba District, a factory owner told reporters that their factory "slimming" rebar production volume of 1000 tons, business is quite booming. Law enforcement officials told reporters that the findings of the illegal cold pull bar is mainly used as stirrups or plate bar use of the plate, processing plants through the cold drawn straightening equipment on the use of less than the specified standard mold, will be the bar super pull. After the illegal processing of steel bar elongation rate is basically more than 4% of the state regulation, mostly 6% to 8%, and some even reached 10%.　　After the black metallurgical products in Shaanxi Province inspection stations, these processed "slimming" steel bars are all unqualified products.　　According to the reporter understands, the present XI ' an this kind of steel bar processing point no less than 100, the ultra pulls the steel bar This "industry" already quite scale, to the steel bar "thin body" already became this profession some greedy person to pursue the high profit to reach the tacit understanding "the latent rule". The reckoning pulled a millimeter of profit staggering the engineer of Shaanxi Provincial Institute of Architectural Science and engineering Dai Jun a book for the journalist, specification 10 mm of steel bar per metre of the specified weight is 0.617 kg, that is, 1 tons of steel should be 1620 meters, and from 10 mm to 9 mm, a ton of steel into a full 2000 meters. With the middle "grow out" of the 380-meter steel bar multiplied by 9 mm of steel weight of 0.4998 kg, you can calculate a ton of steel from 10 mm to 9 mm will be "more out" 190 kg. According to 4000 yuan per ton of steel, 190 kg of steel value of 760 yuan, this is the processing plants and builders earn "fishy".　　As a result, each "0.1 mm" of the extension of the violation implies huge profits. Reporters learned that these "slimming" steel processing plants outside the Lanhuo, not to processing units charge processing fees, and even pay their extra "kickbacks and wouldn't" to improve the product market "competitiveness." Reporter saw a processing agreement clearly written: "Each processing 100 tons, processing side to return to the party a 1.8 tons of steel, can be settled in renminbi." "The disclosure of factory bribery supervision and release of such huge access, is responsible for inspection of building materials, protection of building qualityWhy does the supervision of quantity safety turn a blind eye?　　An unnamed factory owner told reporters, because these "slimming" rebar into the site must undergo supervision inspection, processing plant to the supervision of "benefits", "slimming" Steel bar has become a qualified product into the site. According to the XI ' an construction project quality safety Supervision Station to the city within the scope of nearly 1000 sites, the use of such illegal rebar accounted for nearly 10%.　　Due to the illegal cold drawn mostly outside the site of the steel processing plant, mostly located in the urban-rural integration department, is currently found to use these rebar is mainly adjacent to the suburbs of Xian commercial development.　　Law enforcement to stop the "slimming" Steel for "thin" steel bar caused by the construction market chaos, Xi ' An and Shaanxi province, the relevant departments have issued documents, to strengthen the quality of rebar processing, to ensure the quality of the project, and to take measures to investigate the use of illegal bars as soon as possible, found that　　Xi ' an urban and rural construction committee has been to all the city site for each of the investigation, and issued a document to require all counties, construction supervision units of the total self-examination project use of steel processing. News interpretation of "thin body" reinforcing steel bar becomes brittle and easy to break it is understood that, according to the relevant provisions of the State on the reinforcement processing, plate round a bar to allow cold drawing, to the reinforcement of straightening and remove its surface rust, easy to use. According to national standard, the cold drawing ratio of the plate round one grade steel bar is not more than 4%.　　In other words, the 10 mm diameter bar can only be drawn to 9.96 mm. The use of tensile steel bars can not guarantee the quality and safety of the building. According to the Shaanxi Provincial Institute of Architectural Sciences, the chief engineer Wu Chengcai introduced, "slimming" reinforcement of the force is destroyed, that is, the steel bar to become "brittle", the impact on the quality of the building is mainly reflected in the seismic resistance. Housing by the earthquake and other large external forces, the tensile strength of the steel will be stretched with the deformation of the building, thereby slowing down the process of the collapse of the person's escape time, and the excessive cold pull to "brittle" steel will suddenly break, so that the house quickly collapsed. Wu Chengcai pointed out that because China is a country with many earthquakes, earthquakes in the Northwest region are also very frequent, so the seismic performance of buildings should be paid attention to.