COMPANY PROFILE
They have significant experience in supplying meteorological masts to carry wind measuring instrumentation and have standard products for this sector, but are happy to provide bespoke designs if needed. They are also able to apply design skills to solve problems regarding the accessibility of the booms and to check towers for fatigue and transportation to offshore sites.
ONSHORE FLI Structures have been supplying permanent free standing meteorological masts for more than 10 years for various wind farm projects. In the early days, the required heights were 50m to 60m. However, about 2 years ago the heights have increased to 80m to enable the collection of wind data at the increasing hub height of the wind turbines. Currently, they are working on the supply a 110m high freestanding met mast, which is easily achievable by extending their mast product range and fully expect even taller masts will be required in the near future. They can respond to demand as it arises.
Guyed met masts are also supplied for temporary applications and less commonly for permanent sites and have been supplying these types of products for decades. They have recently supplied a 90m guyed mast for a dedicated Lidar & Sodar test site and can also provide a turnkey solution, including the base design and installation as well as the supply, installation and commissioning of the instrumentation.
OFFSHORE FLI Structures have supplied a number of offshore met masts and currently have 3no. 90m (117m with pile) for Round 3 offshore wind farm projects in fabrication.
Offshore met masts present different challenges to onshore such as more stringent quality control, due to the high cost of rectifying any problems. This suits their normal working practices as they surpass the requirements of ISO9001 quality standard, OHSAS18001 occupation health & safety, ISO14001 Environmental Management and part of the Achilles Link-up qualification scheme.
The requirements for design verification are also more onerous and at FLI they have a team of 7 engineers, so this is not an issue for them.
WIND INSTRUMENT BOOM DESIGN Another area of interest is wind instrument boom design with varying requirements from clients regarding their height, lengths and how they should be accessed and constructed. They do not simply offer one solution to fit all. Instead their experienced structural steel designers work with the client to provide the solution that they need for their project, which seems to vary every time.
They are making booms with rollers at present and are working on a ‘swing boom’ design and have produced a neat standing board design at boom levels, to make access easier, without adding too much wind distortion local to the instrumentation.
They are also to detail and manufacture Lidar frames, if they are required in addition to a meteorological mast or in its place.
STANDARDS
Meteorological masts are designed for site specific environmental parameters to comply with British/European standards. Site wind speeds, ice loading, altitude and terrain are all factors considered to comply with the requirements of the industry standards BS8100, BS EN 61400-12-1 and the more recent BS EN 1991-1-4 and BS EN 1993-3-1 when fully adopted.
FLI Structures
www.fli.co.uk
www.windenergynetwork.co.uk
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