Steel Portal Frame

Bespoke Steel Portal Frame Fabrication & Installation

Franks Steel specialises in the fabrication, supply and installation of bespoke steel portal frames for commercial, industrial and agricultural buildings throughout London and the surrounding areas. Designed for exceptional strength, durability and long spans, our portal frame structures provide the ideal solution for warehouses, factories, workshops, retail units and industrial developments.

Working from structural engineer drawings, we manufacture every steel portal frame in-house before delivering it to site for professional installation. Our experienced team ensures every project is completed with precision, helping clients keep construction programmes on schedule.

What is a Steel Portal Frame?

A steel portal frame is one of the most efficient structural systems used in modern construction. Designed to create large open spaces with minimal internal columns, portal frames provide outstanding structural strength while allowing maximum flexibility for the internal layout of the building.

Steel portal frames are commonly used for:

  • Warehouses
  • Industrial units
  • Commercial buildings
  • Distribution centres
  • Agricultural buildings
  • Storage facilities
  • Workshops
  • Manufacturing facilities

Their ability to span large distances makes them one of the most cost-effective structural steel solutions available.

Steel portal frame supplied by Franks Steel for a commercial warehouse building in London.
Bespoke steel portal frame supplied by Franks Steel for a commercial warehouse development in London.

Professional Installation

Alongside fabrication, Franks Steel provides a complete installation service.

Our experienced steel erectors safely install portal frames for projects of all sizes, ensuring every component is aligned correctly and securely fixed in accordance with the structural engineer’s specifications.

From small commercial units to large industrial developments, we provide efficient installation with minimal disruption to your project.

Bespoke Steel Portal Frame Fabrication

Every project begins with the structural engineer’s drawings.

Our experienced fabrication team manufactures each steel portal frame to precise specifications using high-quality structural steel. Every beam, column, connection plate and bracing member is carefully fabricated, inspected and prepared before delivery.

Our fabrication service includes:

  • Portal frame columns
  • Portal frame rafters
  • Steel beams
  • Structural steel columns
  • Roof steelwork
  • Connection plates
  • Wind bracing
  • Roof bracing
  • Base plates
  • Secondary steelwork

Every component is manufactured to ensure a precise fit during installation.

Benefits of a Steel Portal Frame

Steel portal frames offer several advantages over traditional construction methods.

Large Clear Spans

Portal frames create wide open spaces without the need for multiple internal supporting columns.

Exceptional Strength

Structural steel provides outstanding load-bearing capacity while maintaining excellent structural stability.

Faster Construction

Because the steelwork is fabricated before arriving on site, installation is significantly faster than traditional building methods.

Cost Effective

Steel portal frames require fewer structural members, helping reduce material and labour costs.

Long-Term Durability

Structural steel provides excellent resistance to warping, shrinking and structural movement, ensuring a long service life.


Commercial & Industrial Applications

Franks Steel manufactures steel portal frames for a wide range of sectors, including:

  • Commercial developments
  • Industrial units
  • Warehouses
  • Factories
  • Retail buildings
  • Distribution centres
  • Agricultural buildings
  • Storage facilities
  • Workshops
  • Manufacturing plants

Whether you require a single portal frame or a complete structural steel package, we can provide a bespoke solution tailored to your project.


Manufactured In-House

Every steel portal frame is fabricated in our own workshop, allowing us to maintain complete quality control throughout production.

Our in-house fabrication ensures:

  • Accurate manufacturing
  • Faster lead times
  • Reliable quality
  • Precision fabrication
  • Efficient project delivery

Why Choose Franks Steel?

Clients choose Franks Steel because we combine expert fabrication with professional installation.

We offer:

  • Bespoke portal frame fabrication
  • Structural steel specialists
  • Professional installation
  • Residential, commercial and industrial expertise
  • Fast turnaround times
  • Competitive pricing
  • Experienced fabrication team
  • Precision engineering
  • High-quality workmanship

Every steel portal frame is manufactured to deliver strength, reliability and long-term performance.


Recent Steel Portal Frame Project

One of our recent projects involved supplying the complete structural steel package for a commercial warehouse development. The project included the fabrication of bespoke portal frame columns, rafters and roof steelwork, creating a durable structure capable of supporting large open internal spaces. All structural steel was fabricated by Franks Steel before being delivered to site for installation.

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Areas We Cover

Franks Steel supplies and installs steel portal frames throughout:

  • London
  • Essex
  • Kent
  • Surrey
  • Hertfordshire
  • Buckinghamshire
  • Berkshire

Frequently Asked Questions

A steel portal frame is a structural steel system designed to support large buildings with wide, open internal spaces using rigid steel columns and rafters.

Steel portal frames are commonly used for warehouses, industrial units, factories, agricultural buildings, workshops and commercial developments.

Yes. Franks Steel fabricates bespoke steel portal frames in-house to structural engineer specifications.

Yes. We provide a complete supply and installation service across London and the surrounding areas.

Get a Free Quote

If you’re planning a commercial, industrial or warehouse development, Franks Steel can fabricate and install a bespoke steel portal frame tailored to your project.

Contact our experienced team today for a free, no-obligation quotation and expert advice on your structural steel requirements.