Steel Fabrication Toronto

Professional Steel Fabrication in the GTA

Last updated: March 6, 2026

Konstruction Group is one of the trusted steel fabricators serving residential and commercial construction throughout Toronto and the GTA. We handle the entire process in-house: detailing, fabrication, and installation - no middlemen, no coordination headaches. Our CWB-certified shop fabricates beams, columns, moment frames, and connection assemblies, then our welders install them on-site. This single-source approach delivers quality structural steel on schedule and integrates seamlessly with our framing, insulation, and drywall services.

Steel Fabrication Services

• Structural Steel Beams – I-beams, W-shapes, and HSS fabricated with connection details, copes, and holes
• Steel Columns – Fabricated columns with base plates, cap plates, and connection hardware
• Connection Plates – Gusset plates, shear tabs, moment plates, and custom connection details
• Base Plates & Anchors – Column base plates with anchor bolt patterns per engineering drawings
• Miscellaneous Steel – Lintels, angles, channels, plates, and custom fabricated components
• Handrails & Guards – Steel pipe and tube railings fabricated to code requirements

Our Fabrication Capabilities

• Cutting – Precision cutting of beams, plates, and shapes to exact dimensions
• Drilling & Punching – Bolt holes positioned accurately per connection drawings
• Welding – CWB-certified welding for structural connections and assemblies
• Bending & Forming – Plate bending, angle bending, and formed components
• Surface Preparation – Cleaning, priming, and coating as specified
• Assembly – Pre-assembly of components for efficient site installation

Quality & Certification

Our fabrication shop holds CWB (Canadian Welding Bureau) certification, ensuring our structural welding meets the quality standards required by Ontario Building Code. All fabrication follows approved shop drawings and engineering specifications. We maintain traceability of materials and provide mill certificates and documentation as required for your project.

In-House Detailing

We provide steel detailing in-house as part of our fabrication service - shop drawings, connection details, and erection drawings are all produced by our team. This eliminates the need to hire a separate detailer and ensures drawings are optimized for our fabrication process. In-house detailing means faster turnaround and direct communication between detailers and fabricators.

Supply and Install

Our specialty is complete supply and install packages - detailing, fabrication, delivery, and erection under one contract. You get single-source accountability and seamless coordination. Our installation crews understand every piece because they came from our shop. This integrated approach is especially valuable on multiplex and custom home projects where steel must coordinate with framing, soundproofing, and fireproofing.

Residential Steel Applications

Structural steel has become a standard part of residential construction in Toronto as homes get larger and floor plans get more open. The most common residential steel we fabricate is carrying beams — wide flange or HSS sections that span across open-concept living areas where a load-bearing wall has been removed. Steel columns replace timber posts where loads are too heavy for wood, and moment frames provide lateral resistance on homes with large window walls or minimal interior bracing. We also fabricate lintels over garage openings, steel posts for elevated decks, and header beams for oversized doorways. Every piece of structural steel in a residential project requires engineer-stamped drawings before we begin fabrication. Our detailing team works directly from these engineering drawings to produce shop drawings, which go back to the engineer for approval. This process ensures the steel you receive is exactly what the design calls for — correct grade, correct size, correct connection details.

Commercial & Multi-Unit Projects

Commercial and multi-unit residential projects rely on steel for spans and loads that wood alone cannot handle. On multiplex builds, we commonly fabricate steel beams that span across party walls to carry upper floor and roof loads, allowing open layouts on main floors without intermediate columns. Mezzanine structures in commercial spaces, steel stairs with stringers and landings, and tenant improvement beams for retail fit-outs are all regular work for our shop. On larger commercial projects, steel coordinates closely with metal stud framing — the steel skeleton goes up first, then metal studs frame around and between the structural members. Fireproofing is applied after steel installation and before framing encloses it, which means the steel schedule directly affects every trade that follows. We manage this sequencing on projects where we handle both steel and framing, eliminating the back-and-forth between separate contractors.

Steel Grades & Material Selection

The standard structural steel grade in Canada is CSA G40.21 350W, a weldable grade with a yield strength of 350 MPa. This is what your structural engineer will specify on most residential and commercial projects in Toronto. HSS (Hollow Structural Sections) — rectangular and round tubes — are common for columns and exposed applications because of their clean profile. Wide flange beams (W-shapes) are the workhorse for carrying beams and headers. The structural engineer specifies the grade and section size based on load calculations, and we fabricate to those specifications exactly. We source steel from established Canadian suppliers and obtain mill certificates for every heat of steel that enters our shop. Mill certificates provide full material traceability — chemical composition, mechanical properties, and heat number — which is required documentation on engineered projects. If your project calls for a non-standard grade or a specific coating system, we confirm availability and lead times during the quoting stage so there are no surprises during fabrication.

Coordination With Other Trades

Steel installation sits at a critical point in the construction sequence, and poor coordination here delays every trade that follows. Anchor bolts and embed plates must be placed in concrete before the pour — if bolt patterns are wrong, the steel does not land on the foundation correctly. We provide anchor bolt layouts and embed details to the concrete contractor well before their pour date. Once foundations are ready, steel erection happens before framing begins, because the structural frame must be in place and inspected before wood or metal studs can be built around it. After steel is installed and connections are torqued or welded, fireproofing is applied to achieve the required fire rating — this must happen before framing encloses the steel and makes it inaccessible. On projects where Konstruction handles both the steel and the framing, we schedule these handoffs internally. There is no waiting on a separate steel contractor to finish before our framing crew can start. This single-contractor approach consistently saves one to two weeks on project timelines compared to splitting the work between independent trades.

What We Provide vs. What You Need

• We Provide – In-house detailing, CWB-certified fabrication, finishing, delivery, and professional on-site installation
• You Provide – Structural engineering drawings, permit coordination, concrete/masonry work, other trades

Structural Steel Fabrication

Structural steel fabrication is our core capability — cutting, drilling, welding, and assembling steel members to the exact specifications on your stamped structural drawings. We fabricate beams, columns, base plates, gusset plates, moment connections, and custom brackets in our shop, then deliver and install on site. Every structural weld is performed by CWB-certified welders, and all fabrication follows CSA W59 and CSA S16 standards for structural steel.

Why Choose Our Steel Fabricators

• Site-Verified Measurements – We measure on-site to account for variances between drawings and actual conditions - ensuring your steel fits perfectly
• Supply & Install – Complete packages - detailing, fabrication, and installation under one contract
• In-House Detailing – Shop drawings produced in-house - no third-party detailers needed
• CWB Certified – Canadian Welding Bureau certified shop and on-site welders
• $10M Insurance – Full coverage for structural steel fabrication, delivery, and installation
• Framing Integration – Steel coordinates seamlessly with our framing, insulation, and drywall
• Residential & Commercial – Custom homes, multiplexes, and commercial projects