News - January 2012

More stringent requirements by Rijkswaterstaat for welding of orthotropic troughs on steel bridge decks.

http://goo.gl/am66W

With the introduction of the recently published "Annex F of NEN EN 1993-2 NOTE", Rijkswaterstaat tightened the requirements for welded joints between orthotropic troughs on steel bridge decks. 

The previously “permitted penetration defect” (MDF) of h2 ≤2mm  is reduced to h2 ≤ 1mm. For many manufacturing companies this is a very drastic change and this means that they have to make the transition to a totally new approach with other
welding processes to meet this requirement. LAB Verduyn BV. was consulted to guide this 
process to a successful result before the start of the manufacturing of four new 80tons
bridges for the "Goereese flood gates" by company Spie.

Required welding detail             Polished macro etch          Orthotropic trough on steel bridge deck