Site Welding and Fabrication

Qualified site welding, mobile fabrication and structural modifications delivered as the final stage of an integrated design, fabrication and installation service.

APS Industrial Services provides site-based structural, machinery, pipework and specialist welding for construction, infrastructure, power generation, industrial and maintenance projects. Our qualified crews mobilise with the equipment, procedures and site controls required to complete new connections, resolve as-built conditions, undertake modifications and support critical repairs safely and efficiently.

The service is a natural continuation of APS Design & Engineering and our Melbourne steel fabrication capability. Designs, surveys and fabrication drawings can be developed in-house, components manufactured and trial-fitted in controlled workshop conditions, then delivered for final fit-up, welding, modification and completion on site. This continuity reduces interfaces, improves constructability and gives clients one accountable team from concept through to installed result.

From Engineering and Workshop Fabrication to Site Completion

Site work is most effective when it is planned before mobilisation. APS links engineering, detailing, procurement, workshop fabrication and field execution so connection details, tolerances, access, lifting requirements and welding controls are considered as one coordinated scope.

Welder in hi-vis welding a steel beam in the APS fabrication workshop, with sparks flying

Site measurement, surveys and verification of existing conditions
Design development, 3D modelling and fabrication drawings
Connection details, repair details and constructability reviews
Workshop fabrication, fit-up and prefabricated assemblies
Delivery, rigging, alignment and final site welding
As-built mark-ups, quality records and completion documentation

Structural Site Welding

APS undertakes coded structural welding for new steelwork, site connections and completion works. Crews coordinate with builders, engineers and erection teams to achieve accurate fit-up and compliant welds while maintaining progress across surrounding workfaces.

Structural beam, column, frame and support connections
Cleats, splice plates, stiffeners, brackets and connection plates
Site welding of stairs, platforms, walkways and handrails
Primary and secondary structural steelwork
Completion welding following steel erection and alignment
Class One and project-specific coded welding

Site Fabrication, Fit-Up and As-Built Modifications

Construction conditions do not always match the drawing. APS provides practical site fabrication and modification capability to resolve dimensional differences, changed interfaces and late design requirements without losing control of engineering intent or quality.

On-site cutting, preparation, fit-up and welding
Fabrication and installation of brackets, supports and frames
Alteration of steelwork to suit verified as-built conditions
Connection adjustments and tolerance rectification
Small-batch and bespoke components fabricated for site needs
Coordination of engineer review and approval where required

Structural Repairs, Alterations and Strengthening

APS supports planned upgrades, defect rectification and urgent structural works with repair and strengthening solutions developed around the condition of the existing asset. Where required, our engineers can assess the interface and produce a practical repair detail before field execution.

Crack, defect and damaged-steel repairs
Strengthening plates, stiffeners and supplementary supports
Alterations for new plant, services and building interfaces
Replacement of corroded or damaged components
Temporary restraint and staged repair methodologies
Maintenance welding during shutdowns and live operations

Pipework, Plant and Specialist Welding

Our welding capability extends beyond building steelwork to pipework, plant and specialist materials used in industrial, energy and marine environments. Welding procedures, material controls and inspection requirements are aligned with the applicable project specification.

Boiler tube and maintenance welding
Large line pipe, structural pipe and spool connections
Storage tank and plant-component welding
Carbon and low-alloy steel welding
Austenitic, duplex and super duplex stainless steels
Copper-nickel, alloys and other specialist materials

Qualified Welders, Procedures and Traceable Quality

Field conditions make control and documentation especially important. APS plans site welding around qualified personnel, approved procedures, material traceability and defined inspection points so the completed work can be verified and handed over with confidence.

Qualified welders matched to the process, material and position
Welding Procedure Specifications and supporting qualifications
Material identification, certificates and consumable control
Weld maps, logs and inspection records
Visual inspection and dimensional verification
NDT coordination and repair close-out where specified

Safe Welding in Live and Constrained Environments

Site welding often takes place beside operating assets, completed finishes, public interfaces or simultaneous trades. APS plans access, hot works, fume and spark controls, exclusion zones and work sequencing around the specific environment to protect people, assets and the programme.

Harnessed worker in hi-vis on a ladder against a steel pile above the water at a marine site

Site-specific work packs, permits and pre-start coordination
Hot-work controls, fire protection and area segregation
Fume management, screens and protection of adjacent finishes
Work in restricted, elevated and difficult-access locations
Coordination with scaffold, rope access and engineered platforms
Planned shutdown, possession and out-of-hours execution

Integrated Access, Rigging and Installation Support

Complex welding is often constrained by how the workface is reached and how the steel is held in position. APS can coordinate specialist access, scaffolding, rigging, lifting and mechanical support as part of the welding scope, reducing subcontractor interfaces and improving control of the installation sequence.

Scaffolding and engineered access platforms
Rope-access welding and difficult-access support
Rigging, lifting, temporary support and steel positioning
Alignment, levelling and fit-up before final welding
Mechanical installation and equipment-support steelwork
One coordinated methodology across access and execution

Site Welding Across Construction and Industry

APS supports Tier 1 builders, infrastructure contractors, asset owners and industrial operators across new construction, upgrades, shutdowns and maintenance. Our integrated model is particularly valuable where site conditions are complex, tolerances are tight or the welding scope depends on engineering, prefabrication, access and installation working together.

Aerial view of a large industrial building under construction with cranes and exposed structural steel

Commercial buildings and high-rise construction
Hospitals, laboratories and live operational facilities
Road, rail, bridge and tunnel infrastructure
Power stations, outages and industrial maintenance
Manufacturing, logistics and automated facilities
Marine, tanks, pipework and specialist plant

Why Choose APS?

APS combines engineering judgement, controlled workshop fabrication and qualified site execution within one accountable team. This end-to-end capability allows us to plan the work properly, prefabricate wherever practical and respond effectively when actual site conditions require safe, technically sound modification.

One accountable team from design and detailing through fabrication and site completion
Qualified welders experienced in structural, pipework and specialist materials
Melbourne fabrication facility supporting prefabrication and rapid site response
Integrated access, scaffolding, rigging and steel-installation capability
Traceable welding, inspection, NDT and handover documentation
Experience in live, constrained and safety-critical project environments
Strong focus on fit-up quality, constructability and programme certainty

Project Examples

Tower 1 – 7 Spencer St – Docklands VIC 3008

APS completed structural steelwork for The Gladstone

Elizabeth North – CSL Limited New Worldwide Headquarters

Melbourne Central Steel Install

A lattice metal facade around a cube shaped building.

Eastlands Facades

An arch of steel beams lining the roof of a shopping centre.

Eastlands Steel Erection

Scaffolding around the outside of an RMIT building under construction

RMIT NAS Building

Steelwork in the form of beams lining the inside of a building

Architectural Steelwork

APS Scaffolding lining the inside of an under construction train tunnel/

Melbourne Metro Tunnel

Get in touch with us today

Your Site Welding and Fabrication Partner

APS delivers site welding and fabrication that closes the gap between engineered design, workshop manufacture and the realities of field installation. From planned structural connections and bespoke modifications to repairs, shutdown work and specialist-material welding, our teams provide the technical capability, site discipline and delivery certainty required to complete complex steelwork safely and correctly.

Contact APS today to discuss your site welding and fabrication requirements.