The municipality of Alphen aan den Rijn had too little information to make a correct assessment of the risks to the hoisting of the new Queen Juliana Bridge last August.
This enables hoisting expert Richard Krabbendam according to documents released in response to a request from the NIS on the basis of the Freedom of Information Act.
On 3 August fell by renovating two cranes to when the bridge deck was lifted.
The municipality of Alphen aan den Rijn has released all its documents on the renovation of the Queen Juliana Bridge that are accessed via a Freedom of Information Act request. It is nearly a hundred documents, such as risk assessments, emails, key reports, minutes of meetings and safety and health plans.
ApproveOne of these documents is the Assembly and Disassembly Plan Juliana Bridge on July 24, 2014, dated ten days before the accident. In it, the construction companies Mourik and BSB Staalbouw describe how business Peinemann lifting the movable bridge part is replaced. They do this, inter alia, on the basis of hoisting drawings.
The report contains no ballast stability calculations or plans for the floating pontoons. This surprises lifting Krabbendam expert: "For such a project, it is normal that there is a proper hoisting plan made, the client must approve in this case is that the municipality of Alphen aan den Rijn.."
Richard Krabbendam is retired specialist in heavy lifting projects. He gives at home and abroad advice and lectures on safety in lifting projects. He urged the companies involved in too quickly publish their information. "For the lessons learned after each accident to improve the safety in the future."
"What I see here is very brief and incomplete. So I miss essential information on the stability of the cranes that were on the pontoons in the Old Rhine. Then the church could no judgment surrender."
Director Ad Cornet lifting Peinemann company says that there is indeed an official lifting plan. "Of course the lifting plan consists of more than just a few drawings. All calculations required to carry out such a good job, have been made. But as long as the investigations into the accident are underway, we do not give pieces free."
Both the Dutch Safety Board, the Inspectorate of Social Affairs and Employment as two by Peinemann in the arm taken engineers investigate the circumstances of the accident with the crane. According Cornet, the research will be completed by the engineering firms over several weeks.
The municipality of Alphen aan den Rijn coming later today with a response.
The other released documents show that construction companies prior to the renovation of the Queen Juliana Bridge brought all sorts of risks in card, such as the collapse of cranes, the fall of the load and shock hazard.
http://nos.nl/nieuws/ © Reuters
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