"Fabrication" is the single word on a steel quote that hides the most work. It covers everything that happens between a raw section leaving the mill and a finished, weld-checked, drilled and primed member arriving at site ready to erect — cutting to length, coping and notching, drilling bolt holes, welding gusset plates and stiffeners, and quality-checking the welds. Because that scope can be simple or highly involved depending on the design, fabrication is priced with a multiplier for complexity, not a single flat rate.
This guide walks through what drives a Nigerian fabrication quote in 2026, what the different levels of complexity actually mean on the shop floor, what coating adds, and how transport and crane access change the delivered cost. It mirrors the fabrication section built into our free Steel Calculator.
Fabrication Scope: What "Cutting, Welding" Actually Covers
A basic fabrication scope for a structural member includes: cutting to length with a cold saw or plasma cutter, drilling or punching bolt holes to a connection design, and any welding needed to attach base plates, end plates or stiffeners. For a simple bolted connection between standard sections, this is quick, repeatable shop work. As soon as a connection involves compound cuts, curved members, moment connections that need full-penetration welds, or non-standard plate shapes, the labour time — and therefore the price — climbs quickly.
Complexity Multipliers: Simple, Medium and Complex
Fabricators price jobs by how much skilled time they consume, which is why the Steel Calculator lets you flag a job as simple, medium or complex:
| Complexity | What it looks like | Typical multiplier on the base rate |
|---|---|---|
| Simple | Straight cuts, standard bolted connections, repetitive members (purlins, straight columns) | 1.0× |
| Medium | Mixed bolted and welded connections, some site-fit tolerances, moderate plate work | ~1.4–1.6× |
| Complex | Moment connections, curved or tapered members, heavy plate stiffening, non-standard geometry | ~2.0–2.5× |
The starting base rate used across the site is roughly ₦500 per kilogram for simple work — a placeholder built from published fabricator day rates rather than a single quoted per-kg figure, since no consistent nationwide per-kg fabrication rate exists in the Nigerian market. Treat it as a planning figure and confirm with your own fabricator once drawings are ready.
Fabricator Day Rates in Nigeria, 2026
If you are pricing a job by labour days rather than by weight — common for smaller, bespoke jobs — indicative 2026 day rates are:
| Role | Day rate (₦) |
|---|---|
| Standard local fabricator / welder | 15,000–25,000 |
| Certified structural fabricator (coded welder) | 30,000–55,000+ |
| Assistant / iron bender | 5,000–10,000 |
A certified, coded welder costs roughly twice a standard fabricator but is required wherever a structural engineer specifies full-penetration or load-bearing welds that need to be certified — do not substitute a standard welder for this work to save money; the saving is false if the connection later fails inspection.
Coating Costs: Primer, Paint and Galvanising
Corrosion protection is priced per kilogram of steel, because heavier sections need proportionally more coating material and time:
- Shop primer only: roughly ₦100/kg — the minimum protection for steel that will stay dry and internal.
- Primer + paint system: roughly ₦250/kg — a reasonable middle ground for steel with some weather exposure.
- Hot-dip galvanising: roughly ₦900/kg — the most durable option, essential for anything permanently outdoors, in a coastal environment, or difficult to repaint later (roof steel, external columns, handrails).
- Power-brushing existing steel: roughly ₦80/kg — for removing rust before recoating, relevant to repair and refurbishment jobs rather than new steel.
On a 700 kg structure, the difference between primer-only and full galvanising is roughly ₦560,000 — a number worth comparing against the cost of repainting rusted steel every few years in a humid or coastal location.
Transport and Crane Access
Steel is moved by the tonne, at roughly ₦40,000 per tonne from a Lagos or Onitsha stockist to a typical site — more for remote locations, poor road access, or loads that need a police escort for oversized sections. Crane hire for lifting fabricated steel into place is a separate day-rate item, roughly ₦100,000 per day for a mobile crane or Hiab. A site with tight access for a crane, overhead power lines, or no hard-standing for outriggers can add cost that a simple weight-based estimate will not capture — always walk the erection route before finalising a quote.
Worked Example: A Medium-Complexity Steel Canopy
A cantilevered steel canopy uses 450 kg of hollow-section steel with welded moment connections at the columns (medium complexity) and needs a full paint system since it is fully exposed.
- Material (hollow sections, ~₦980/kg): 450 × 980 = ₦441,000
- Fabrication (₦500/kg base × 1.5 medium multiplier): 450 × 750 = ₦337,500
- Erection (₦200/kg): 450 × 200 = ₦90,000
- Paint system (₦250/kg): 450 × 250 = ₦112,500
- Transport (0.45t × ₦40,000): ₦18,000
Total: roughly ₦999,000 — showing how the complexity multiplier alone added ₦112,500 over a simple-scope price for the same weight of steel.
Common Fabrication Quote Mistakes
- Comparing quotes at different complexity levels. A cheaper quote may simply be assuming a simpler scope than your drawings actually require — always check what complexity level was assumed.
- Skipping certified welders for structural welds. If the engineer's drawings call for a coded weld, a lower quote from an uncertified welder is not a genuine option.
- Underpricing coating on exposed steel. Primer alone on external steel is a short-term saving that costs more in repainting within a few years.
- Forgetting crane access constraints. A confined site can turn a routine erection into a specialist (and expensive) lift.
- Not asking what "fabrication" includes. Confirm whether drilling, welding consumables, and quality checks are all inside the quoted rate.
Lead Times and Payment Terms
Fabrication is rarely an overnight service, and lead time should be built into any project schedule that depends on steel arriving ready to erect. A straightforward, simple-complexity job at a workshop with available capacity can turn around in a week or two once drawings are confirmed; a medium or complex job, or one competing for workshop time against other clients' jobs, can extend to three to six weeks or more. Confirm lead time explicitly before finalising a construction programme that assumes steel will be ready by a specific date, and build in a reasonable buffer — fabrication delays are a common, avoidable cause of knock-on delay to erection and every trade that follows it.
Payment terms for fabrication commonly follow a staged structure rather than a single lump sum: a deposit to secure material and workshop time, a further payment on completion of fabrication before delivery, and a final balance after successful erection and any snagging is resolved. This staged approach protects both sides — the fabricator secures cash flow to buy material upfront, and the client retains some leverage until the finished, erected steel is confirmed to meet specification. Agree this structure in writing before work starts, including what happens if a delay on either side (late drawings, late site access) pushes the schedule out.
Frequently Asked Questions
What does "complexity" mean on a fabrication quote?
It describes how much skilled shop time a connection needs. Simple bolted, repetitive work costs the least per kilogram; complex moment connections, curved members and heavy plate work can cost more than twice as much for the same weight of steel.
Do I need a certified welder for my project?
Ask your structural engineer. Any connection specified as a full-penetration or load-bearing weld on structural drawings should be done by a certified, coded welder, not a standard fabricator.
Is galvanising worth the extra cost?
For any steel that will be permanently exposed to weather — roof structures, external columns, canopies, handrails — yes. The upfront cost is higher than primer and paint, but it avoids repeated repainting and the risk of section loss from corrosion over the building's life.
How is transport priced if my site is far from a stockist?
The ₦40,000-per-tonne figure is a baseline for a typical delivery distance; remote sites, poor roads, or loads needing an escort for oversized sections should get a specific quote from the transporter rather than relying on the baseline rate.
Can I get a fixed-price fabrication quote, or does it always fluctuate with steel prices?
Some fabricators will hold a fixed price for a defined validity period, particularly if the raw material is purchased and secured early; others price at the time of fabrication using the day's material cost. Clarify this explicitly in the quote, especially on a project where fabrication will not start for some weeks after the quote is issued, since steel material cost is the more volatile component of the two.
Price Your Structural Steel in Minutes
The free Steel Calculator prices beams, channels, angles, hollow sections and fasteners by weight, then adds fabrication, erection, coating and transport. Working with reinforcement instead? Try the Rebar Calculator. Pricing a whole building? The Professional Estimator includes structural steel in every element that needs it.
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