Monopole vs Lattice TowerMonopole vs Lattice Tower

AestheticAesthetic

•Slim shapeSlim shape

•Cross-arms straight or Cross-arms straight or « gullwing »« gullwing »

Surface on groundSurface on ground

Urban areaUrban area

ParisParis

TaiwanTaiwan

Lattice tower: 30 to 100 m²Lattice tower: 30 to 100 m²

Tubular steel pole: 3 to 10 m²Tubular steel pole: 3 to 10 m²

For special conditions, the For special conditions, the monopoles are designed and monopoles are designed and optimized.optimized.

Bottom diameter Bottom diameter can be reduced can be reduced when using thick when using thick plates (thus heavy plates (thus heavy press brakes) and press brakes) and HYSS (high yield HYSS (high yield stress steel)stress steel)

Surface on groundSurface on ground

Agricultural areaAgricultural area

Better conditions for farmers (ploughing, harvesting, etc….)Better conditions for farmers (ploughing, harvesting, etc….)

Less property payment (depending of square meters)Less property payment (depending of square meters)

Less ROW (right of way)Less ROW (right of way)

•Reduced bottom diameterReduced bottom diameter

•Compact lines; post Compact lines; post insulatorsinsulators

InstallationInstallation

Helicopter in remote access areasHelicopter in remote access areas

• Weight limited to Weight limited to 2.5 up to 5 tons per 2.5 up to 5 tons per sectionsection

Special designSpecial design

•Special centering Special centering and orientating and orientating system requiredsystem required

Heavy weather conditionsHeavy weather conditions•Wind, tornadoes, typhoonsWind, tornadoes, typhoons

•AvalanchesAvalanches

•SeismesSeismes

•Tree falls on conductorsTree falls on conductors

•Advantages of tubular Advantages of tubular poles:poles:

•HYSS – flexibilityHYSS – flexibility

•Torsion behaviourTorsion behaviour

•Lattice towers: rigidityLattice towers: rigidity

•Low torsion abilityLow torsion abilityFrance wind storm France wind storm december 1999december 1999

VandalismVandalism

•Terrorist-proof Terrorist-proof

•Lattice angles robberyLattice angles robbery

Monopoles - LatticeMonopoles - Lattice

Pole S3 H4 Pylône H92