The lattice masts installed by
ISTOS RENEWABLES
have been developed by experienced engineers. The static sufficiency has been studied in accordance with:
• Eurocode 3: Design of steel structure (ΕΝ 1993)
• Eurocode 1: Actions on structures (ΕΝ 1991)
Strength*
MODEL |
Height |
Material |
Strength against wind gust at the top of the mast* |
Ice thickness** |
N-500 |
42m |
S-355 |
97m/s |
No Ice |
60m/s |
12.5mm |
45m/s |
25mm |
60m |
S-355 with reinforcement brackets |
79m/s |
No Ice |
49m/s |
12.5mm |
37m/s |
25mm |
80m |
S-355 with reinforcement brackets |
68m/s |
No Ice |
42m/s |
12.5mm |
31m/s |
25mm |
MODEL |
Height |
Material |
Strength against wind gust at the top of the mast* |
Ice thickness** |
|
42m |
S-355 with reinforcement brackets |
122m/s |
No Ice |
75m/s |
12.5mm |
56m/s |
25mm |
60m |
S-355 with reinforcement brackets |
100m/s |
No Ice |
61m/s |
12.5mm |
46m/s |
25mm |
80m |
S-355 with reinforcement brackets |
85m/s |
No Ice |
51m/s |
12.5mm |
39m/s |
25mm |
Technical Specifications
• Weight of a 4m section: 60 kg (approx)
• Steel grade: S355 for 60mm tubes (with tensile test certificate by accredited lab)
• Treatment: electrolytic zinc plating after welding
• Final treatment: electrostatic paint in colours UV resistant and compliant with Civil Aviation Agency demands (Red & White).
Design & Development
For the realization of the strength study, a 3D F.E. model of the lattice mast was constructed, on which were placed the restrictions and the loads (gravity, ice and wind).
Stresses were calculated and evaluated (Nastran solver) to determine the static sufficiency of the structure.
Apart from the lattice elements and wire-ropes as an assembly, simulations of significant parts (component analysis) have been carried out, like as guy-wire adaptor plates, base of erection. By this way, the risk of ignoring a weak point is eliminated.

Optimization and strength analysis of the rotating erection base.

Optimization and strength analysis of the guy-wire adaptor plate.
Construction and Quality Control
- The construction of our Lattice masts is
carried out in our local factory based on our construction standards under our full supervision.
- The tubes and welds of
our lattice masts are subjected to quality control by an accredited laboratory