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FEATURE SPONSOR


WORKING AT HEIGHTS SCROBY SANDS A CASE STUDY


Due to their extensive experience of working at height in a variety of industries, Abfad Limited were awarded a tender by E.ON Climate & Renewables UK Ltd to provide maintenance and restoration work using rope access techniques on one of their met masts, at Scroby Sands off the coast of Great Yarmouth.


THE PROJECT


The project details provided by E.ON were to fabricate new ladder sections and eight clamps, remove existing damaged ladder sections, blast clean the structure to SA2.5 and apply a protective coating, install new clamps and tighten using Hydratight hydraulic equipment, then install new access ladders to the structure.


GAINING ACCESS


Existing ladder sections were damaged and structural steel beneath walkway gratings and mast steel was highly corroded to sea elevation. Once rope access technicians gained access, existing ladder sections were removed prior to blasting corrosion from the structure.


PATENTED MAGNETIC POSITIONING AID


The company’s rope access teams use their own patented magnetic positioning aid when working on ferrous structures in addition to rope anchors, this is particularly useful when blasting and spraying as it securely positions the rope access technician to the structure and allows them to perform required work with precision. After all blasting work was completed, the met mast was spray coated with a protective coating in order to protect it from further corrosion.


INSTALLATION TECHNIQUE


Once new ladder and clamp sections were fabricated and coated ready for installation a technique had to be agreed to install from support vessel to mast structure during sea swells to ensure during lifting process the support vessel deck was not damaged


This was achieved by using powered (battery) winches to lift the clamps and ladder section into place swiftly and hold them steady while they were installed by Abfad personnel using rope access techniques. Once installed these clamps were then tightened to specifications using the Hydratight hydraulic equipment. To complete the project final commissioning checks were performed, again using rope access methods.


COMPLETE SUCCESS


All parties considered the project a complete success and the company was asked to later return to the met mast at Scroby Sands and perform NDT inspections to the structure. During this visit they also performed tightening of all bolts on the structure to complete the work specification.


Abfad Limited


www.windenergynetwork.co.uk


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