Gantries, Masts
& Girders
HV gantries and supports
We manufacture gantries, masts and girders for substation, transmission and electrical infrastructure projects across the UK. Built to support critical energy equipment, our fabricated steelwork delivers strength, stability and compliance. From bespoke support frames to heavy-duty structural components, we provide reliable solutions for demanding power sector applications.
BS EN 1090
Certified to BS EN 1090-1:2009+A1:2011 Execution Class 3 as per BS EN 1090-2:2018
30+ Years
Years supplying the industry with trusted structural steel fabrication and installation excellence
Workforce
Welding Quality Management System (WQMS) accredited by ISOQAR, approved to BS EN 1090 EXC 3.
UK-Wide
Site erection coverage across the United Kingdom with full project management support
Gantries & supports
Gantries, masts and girders for HV substation and OHL infrastructure.
We manufacture gantries, masts and girders for substation, transmission and electrical infrastructure projects across the UK — engineered for strength, stability and compliance with the demanding power sector environment.
Capability
What we
deliver.
From busbar and line-entry gantries through lightning masts and structural girders — every fabrication is engineered to conductor tensions, short-circuit forces and crane loads, hot-dip galvanised and delivered in lifts sequenced to site cranage.
Phase 01
Busbar and line gantries
Lattice and portal-style gantries for incoming overhead lines, busbar runs and line terminations — engineered to the conductor tensions and electrical clearances specified.
- Lattice & portal styles
- Conductor-tension engineered
- Clearance compliant
- Termination-ready
Phase 02
Lightning masts
Lattice and tubular lightning protection masts up to project-specified heights, hot-dip galvanised with integrated earthing connections for compliant lightning protection zones.
- Lattice & tubular masts
- Integrated earthing
- Hot-dip galvanised
- LPS-zone designed
Phase 03
Structural girders
Heavy-duty girders for switchroom roofs, GIS buildings and equipment housings — engineered to crane loads, plant weights and seismic requirements as specified.
- Switchroom & GIS girders
- Crane load engineered
- Plant weights covered
- Seismic where required
Phase 04
Erection-ready
Modular bolted assemblies, workshop trial-fitted then galvanised, delivered with HDG bolt packs, marked drawings and lift sequences aligned to site cranage.
- Workshop trial-fitted
- HDG bolt packs
- Lift-sequenced delivery
- Site cranage aligned
Gantries, masts and girders for HV infrastructure
Our Ethos
Heavy-duty gantries
- Busbar, line-entry and strain gantries
- Lattice and portal-style fabrications
- Engineered to conductor tensions
- Clearance and creepage zones built in
Lightning masts
- Lattice and tubular mast fabrication
- Integrated earthing connections
- Hot-dip galvanised for outdoor service
- Designed to project lightning protection zones
Structural girders
- Switchroom and GIS building girders
- Crane and plant loadings engineered
- Connections to BS EN 14399 HSFG
- Workshop trial-fitted before despatch
Erection-ready
- Modular bolted assemblies
- HDG bolt packs per structure
- Marked drawings and lift sequences
- Aligned to site cranage constraints
Accreditations
Quality you can
prove anytime.
Every job leaves our facility with full documentation — mill certificates, weld records, inspection reports, CE / UKCA declarations and delivery notes.
- BS EN 1090 EXC 3
- BS EN 9606-1 Coded Welders
- ISOQAR Accredited WQMS
- UKCA Marking
- ISO 9001 Quality
- CE Marked Fabrication
More Substation Steelwork
Explore related substation steelwork.
Gantries, masts and girders are one part of our wider substation steel offering — galvanised and aluminium supports, GRP platforms and GIS buildings all share the same engineering team. Explore the full substation product range.
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Access & maintenance
Steel & GRP Platforms
Steel and GRP platforms for safe access, inspection and maintenance across UK substations and electrical infrastructure sites.
Gas insulated switchgear
GIS Buildings
Robust GIS buildings designed to house and protect gas insulated switchgear installations across the UK energy sector.
OHL fabrication
Transmission & Distribution (OHL Fabrication)
Transmission and distribution fabrication for overhead line infrastructure, substations and UK power network projects.
Gantries & supports
Substation gantries, lightning masts and structural girders
Heavy-duty structural steel gantries, lattice and tubular lightning masts and switchroom girders for HV and EHV substations — engineered to conductor tensions, short-circuit forces and crane loads, hot-dip galvanised and CE / UKCA marked.
Modular bolted assemblies are workshop trial-fitted, galvanised, then delivered with HDG bolt packs and lift sequences aligned to site cranage and access constraints.
Engineered to the layout
Our engineering and design team co-ordinates clearances and electrical layouts before any steel is cut.
Wider substation package
Gantries integrate with galvanised support structures and access platforms — one accredited supplier across the compound.
FAQs
Gantries, masts
& girders.
Gantries, lightning masts and structural girders for substation, transmission and electrical infrastructure projects.
- Busbar gantries, line termination gantries, strain gantries and equipment support gantries for HV and EHV substations — engineered to conductor tensions, short-circuit forces and electrical clearance requirements.
Ready to build