Every bolted connection
starts with the right hole.

Steel beam drilling is critical to the strength and accuracy of any structural steel connection. At MAH Steel, we are steel fabricators providing steel drilling services across Kent, London and the South East, ensuring every connection is accurate, clean, and ready for site installation.

We use advanced magnetic base drilling systems (mag drills) to carry out controlled drilling directly into steel beams, plates, and fabricated components. This keeps the drill stable during operation and helps achieve accurate hole placement for bolted connections and structural fixing points.

Drilling can be part of a complete structural steel fabrication package, alongside CNC steel profiling, welding, steel connection design and delivery. We work with all types of steel, and structural sections used in residential, commercial, and industrial builds.

Steel beam drilling for bolted connections
Plate and cleat hole drilling
Workshop drilling
Onsite drilling and adjustments

Workshop drilling.
Onsite flexibility.

We provide both workshop-based and onsite steel drilling depending on project requirements.

A steel beam on workshop trestles with a drill press and workbench behind it in the MAH Steel workshop

Workshop drilling

Workshop drilling is used for fabrication work, planned with cutting, plating and welding in our Gravesend workshop.

Used for beams, columns, plates and fabricated assemblies

A steel frame erected on a building site beside a brick wall, with steel beams laid on the ground in front

Onsite drilling

Onsite drilling supports adjustments, repairs and installation needs when changes happen during construction.

Used for site adjustments, repairs and installation needs

Close-up of a drill bit cutting into steel, with metal swarf around it

Accuracy and equipment

Magnetic base drills keep the drill stable during operation, with controlled positioning for correct hole alignment.

Used for beams, columns and heavy plate steel

Grey painted steel beams with drilled bolt holes laid out in a yard beside a MAH Steel van and a forklift

Planned with the whole package

Drilling is planned with the rest of the order, so drilled steel is ready for bolting, assembly and erection.

Used for fabrication, welding, finishing and delivery together

Steel drilling
capabilities.

We carry out steel drilling for a wide range of structural applications, including:

A steel box beam on workshop stands with a drilled end plate, six bolt holes and a job number marked on it in yellow paint

Steel beam drilling for bolted connections

Accurately positioned holes in beams and adjoining steelwork, prepared for bolted connections and structural fixing points. Magnetic base drills keep the drill stable during operation, and drilling is carried out to tight tolerances to ensure all bolt connections align correctly during erection.

Plate and cleat hole drilling

Hole preparation for end plates, cleats and other plates that connect structural members. For some plate work, steel plate punching is the related hole-making process, so tell us what you are making and we can advise.

Structural steel drilling

Drilling across beams, columns and structural sections, with equipment suitable for beams, columns, and heavy plate steel. We work with all types of steel, and structural sections used in residential, commercial, and industrial builds.

Onsite steel drilling and adjustments

Onsite drilling supports adjustments, repairs, and installation needs. This flexibility helps keep projects moving when changes happen during construction. Working on an active site brings extra access and safety considerations, so talk to the office early about the scope. See on-site steel fabrication and steel erection.

Drilling for complex connection layouts

Steel drilling for both standard and bespoke fabrication projects. Whether it's simple bolt holes or complex connection detailing, all drilling is carried out accurately to match engineer drawings and ensure correct fit during installation. See steel connection design and our connections.

Where we work

We provide structural steel drilling services across London, Kent, Essex, Surrey and Sussex, and the wider South East, supporting builders, contractors, and steel fabricators with reliable work. If you need steel beam drilling or structural steel fabrication support, MAH Steel can deliver accurate results that keep your project on track. See all our service areas.

Why steel beam drilling matters

Correct drilling directly affects how smoothly and safely steel can be installed on site. Poor alignment can lead to delays during steel erection, rework or re-fabrication, and increased labour and project costs. We focus on getting it right first time, so your structural steel fits as designed and installs without issues. See bolted connections compared with welded ones.

From drawing to drilled steelwork.

Drilling is one stage in a longer fabrication sequence. Which stages apply depends on the steel, the drawings and the services agreed with MAH.

Review

Check the sections, plates and connection details against the approved drawings.

Mark up

Mark the plates and beams, ready for the drill team.

Drill

Drill the holes with stable, controlled equipment, including magnetic base drills.

Check

Check the holes again, then carry on with welding, finishing and delivery as the job needs.

Drilling is one part
of the job.

Drilling sits alongside fabrication, cutting, welding, punching and connection design, each with its own service page.

A galvanised steel beam with stiffener plates and a shelving plate on workshop stands

Structural steel fabricationBeams, plates, cranked members and frames made to approved drawings.

A MAH Steel operator measuring a steel section on the workshop saw line

CNC steel profilingCNC profiling and laser cutting of plates and sections, with drilling, milling, scribing and marking for fabrication-ready steel.

A fabricated steel beam end with a drilled connection plate in the workshop

Steel connection designCranked beams, splice connections and plates for the joints between steel members.

Steel connection plates with bolt holes lying on a steel beam in the workshop

Steel plate punchingPunched holes in steel plates, brackets and connection plates.

A welder in a protective mask working on the drilled end plate of a large steel beam in the MAH Steel workshop

Steel weldingMIG, TIG and gas welding for structural steelwork, railings, gates and repairs.

Explore all MAH services

Drilling on real MAH projects.

Published MAH case studies where drilling was part of the fabrication, with the actual locations and links to the work.

London

Structural steel fabrication for a client in London

Beams and columns with welded end plates and drilled connections: holes drilled by the drilling team and checked again, with the welding…

View project

North London

2 structural splices in North London

Two structural splices and shelving plates, with the drilling done on mag drills and a hole punch machine, then welded, primed and lifted…

View project

Edgware, London

Edgware steel beams & columns

Edgware beams and columns where the plates and beams were marked up for the drill team and the holes checked before the steel moved on.

View project

See all MAH Steel projects

Steel drilling questions and answers.

Drilling in steelwork is used to create correctly positioned fixing points that allow components to be securely assembled within structural frameworks. This section outlines how our steel drilling services are carried out, including typical applications, preparation steps, equipment used, and how drilled elements are incorporated into fabrication and site installation processes.

What is steel drilling used for in structural steel fabrication?

Steel drilling is used to create precise holes in beams, plates, and structural components for bolted connections and assembly. It is a key part of the fabrication process, ensuring all elements can be securely fixed together on site.

What is the difference between steel drilling and steel punching?

Steel drilling removes material using rotating drill bits to create clean, accurate holes, making it ideal for thicker steel and high-precision work. Steel punching, on the other hand, uses force to press holes through thinner material and is typically faster for high-volume production.

Do you offer drilling for bespoke and complex steelwork?

Yes, we provide steel drilling for both standard and bespoke fabrication projects. Whether it’s simple bolt holes or complex connection detailing, all drilling is carried out accurately to match engineer drawings and ensure correct fit during installation.

Can MAH drill steelwork on site?

Yes. We provide both workshop-based and onsite steel drilling depending on project requirements. Onsite drilling supports adjustments, repairs and installation needs. Send the drawings and details so the team can advise on the approach.

What do you need to price drilling work?

Send the steel section details, the drawings, the hole sizes and positions if they are set, the quantities, and whether the work is needed in the workshop or on site. The team can advise what else is useful.

See all our FAQs

Have drilling or connection drawings ready?

Send MAH the drawings and details. We can advise on the drilling work and on any related fabrication, delivery or installation requirements, and quote for it all together.

Get a quote Or call 01322 276948

Steel beam drilling services in London and Kent.

Every bolted connection
starts with the right hole.