The Complete Guide to Transmission Structures
ENSOL Engineering TeamUpdated 2026-02-253 min read
Transmission and substation structures are the galvanised steelwork that carries conductors and supports equipment across the power network. This guide covers the types, galvanising and quality control that make them utility-grade.
Key takeaways
- Lattice towers, gantries and substation structures are fabricated to utility drawings.
- Dimensional consistency matters as much as strength.
- Hot-dip galvanising with verified thickness gives long outdoor life.
- Type-testing and utility approvals support acceptance.
Types of structure
Lattice transmission towers carry overhead lines; gantries and substation/switchyard structures support busbars and equipment. Monopoles suit space-constrained urban routes. All are fabricated to utility drawings.
Galvanising and quality
Hot-dip galvanising with NABL-verified coating thickness gives the long outdoor service life the grid requires. Consistency across a line is as important as member strength.