Three-story portion of the building of Health houses in Ystad collapsed in May 2012 This was the pillar of the building section had been given the wrong dimension.
The minutes showed the drawings to Health house was examined. Still got the wrong dimension pillars and the building collapsed. The control system in the construction industry may scathing criticism in an unknown investigation.
Three floor part of the ongoing redevelopment and to the building in Ystad collapsed a May night 2012th At that time there were no construction workers on site, so no one was hurt.
The cause of the collapse has been investigated by the Swedish Work Environment Authority, Danewids Engineering Office and the Swedish Accident Investigation Board. All agree that incorrectly dimensioned pillars blame.
The error seems to have occurred by the designer copied columns from planar portion and placed them in treplansdelen in the computer program. The problem was that the pillars were too feeble to withstand the load in treplansdelen.
New Technology has reviewed the investigation Carl Johan Johansson at the Swedish National Testing and Research Institute, has written to the Swedish Accident Investigation Board. The study constituted a basis for the Commission and has not been published previously.
After the collapse interviewed Carl-Johan Johansson several people involved in the project and he testifies that many were ashamed.
– They thought it was terrible that this could happen. Especially those who have made the most serious error. The error on the column was crucial, for it now, it was embarrassing to say the least, he says.
The error occurred at Sydark Construct, which responsible for constructing the steel frame. But the company’s self-inspection everything looked good. The CEO and an engineer has signed that the drawings have been checked against the estimates.
But investigators have not been able to find any documentation of how the calculation of the pillars went to. And there is no basis of calculation, there is also something to check against the drawings. Carl-Johan Johansson says because he is sure that Sydark Construct has not done the check.
– How would they have been able to do when there is no basis of calculation? I think it’s serious. Self Check is a paper product, he says.
The construction project was characterized by an unclear division of responsibilities, both in design and in construction.
– Several Peab said they felt they had control of the building when there were so many actors involved. But that’s bullshit, Peab must arrange so that they have control over their subcontractors, says Carl-Johan Johansson.
Several errors were made out on the construction site.
- Peab decided for instance to replace the interaction beams as construction drawings entered, against a less expensive type. Both Strong Concrete, who delivered the concrete foundation and HS Bykonsult, who constructed the wall elements, protested against the change and argued that the new beams was difficult to assemble. But Peab stuck to his decision. When the beams would then be set up just had the installers access to the drawings for the beams as construction firm had entered.
- When the pillars and wall elements were erected at the site discovered that the pillars were two inches higher than the wall elements. Peab’s manager then ordered that the pillars would be cut. The work was done with an angle grinder and parts were welded together without a joint preparation.
– Unacceptable. The weld has little strength and it can be difficult to get the column completely straight, which may have an adverse effect on the carrying capacity. One should of course have consulted a designer, says Carl-Johan Johansson.
Despite all these problems have virtually no abnormalities recorded during the construction period of the companies involved.
– Everyone has prided itself for having very fine quality. But it turns out that they are not worth that much. It’s mostly paper and talk, says Carl-Johan Johansson.
He notes that the control system of the former Planning and Building Act, which applied for Health house was uddlöst. One aim of the new Planning and Building Act was to strengthen control. But according to the part of the SP report about how some players in the construction industry looks at the new legislation, it does not pose any significant improvements. n
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