Mennens checks the steel wire ropes of the Samuel Beckett Bridge in Dublin, together with other specialists. Mennens took care of the steel wire ropes on which the road hangs. Read how our mechanics show an extraordinary example of precision work with nondestructive testing (NDT).
The Samuel Beckett Bridge is a road bridge that spans the river Liffey in Dublin. It’s a cable-stayed bridge with 31 guy-wires with a locked coil construction and a double curved pilon, giving it a harp-like appearance. These steel wire ropes need to be inspected extensively on a regular basis. Mennens engineers therefore perform an NDT.
NDT with magnetic rope testing
Mennens performs an NDT based on the magnetic rope testing method. We created a magnetic field around the steel wire ropes. If there is internal corrosion or breakage, it will affect the magnetic field. This gives us a clear picture of the internal part of the steel wire rope. And we can show whether a wire rope needs to be replaced or not.
Testing with a cable crawler
We use a cable crawler from our partner SuproTech. It consists of two halves that we clamp together. We reinforce the device with four guiding rods, because the magnet must be stable in order to get a good ‘reading’ of the steel wire rope.
Results and advice
The NDT showed small deviations in the steel wire ropes. This wasn’t a reason to reject them, so the steel wire ropes were approved for use.
The steel wire ropes of the bridge are now equipped with LED lighting. We advised that a magnetic rope testing inspection will be carried out once the LED lighting is removed. So that we can investigate how the status of the steel wire ropes has progressed.