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Costing Steelwork 30 is a 13 December 2024 sponsored feature that combines a UK structural-steel market snapshot with practical guidance on proving a steelwork contractor’s competence. Its frame, floor and fire-protection rates are historical 2024 benchmarks—not quotations for a 2026 project. Use them to test whether a design and budget are internally consistent, then obtain current, project-specific prices and verify the contractor’s documents, trained personnel and site controls before appointment.
The article’s central practical question is how a contractor can demonstrate competency before steel erection starts. The answer is an evidence chain: properly specified and documented products, an assessed factory production system, named role-holders with current training, an appropriate contractor assessment such as RQSC Buildings, and a safe, signed handover of site conditions and responsibilities.
What does Costing Steelwork 30 cover?
Published on 13 December 2024 in the Building/Steel for Life series, Costing Steelwork 30 has two strands. Aecom’s update reports construction-market indicators and illustrative steelwork costs. The second strand, developed with the British Constructional Steelwork Association (BCSA), explains what clients and supply-chain partners should look for when assessing a contractor’s capability.
Those strands should not be confused with a live tender. The cost data uses 2024 measures and location factors from the fourth quarter of 2023. Aecom says the rates are for comparative purposes and should not be relied on for another purpose without further discussion. A project team should therefore treat every number below as a dated benchmark, not as a promise of what a fabricator or erector will charge.
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What did the 2024 market snapshot show?
The article describes a mixed market rather than a simple boom or slump. The following figures are reported in Costing Steelwork 30, with the original sources identified there:
- Construction new-work output fell 6.6% in the first half of 2024, according to the Office for National Statistics (ONS).
- Repair and maintenance output rose 7.9% over the same period, also using ONS data.
- New construction orders were 12% higher in the first half of 2024 than in the first half of 2023 (ONS).
- Aecom’s composite building-cost index increased 1.8% in the third quarter of 2024.
- Department for Business and Trade composite indices showed material prices 2.6% lower year on year at the time of publication.
- The Construction Industry Training Board (CITB) estimate cited by the article said the industry would need an additional 50,300 workers a year through 2028.
These indicators explain why a single “steel price” is an inadequate budget input. Workload, labour availability, fabrication capacity, material movements, programme risk and location can all pull a project price in different directions.
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What are the Costing Steelwork 30 frame and floor rates?
The Costing Steelwork 30 PDF gives indicative rates at a base index of 100, expressed per square metre of gross internal floor area. The source was checked in November 2026; the figures themselves remain 2024 historical benchmarks.
| Element | Indicative rate (£/m²) | Assumption stated in the article |
|---|---|---|
| Low-rise steel frame | 153–186 | 55 kg/m² steelwork design |
| High-rise steel frame | 257–290 | 90 kg/m² steelwork design |
| Complex steel frame | 290–343 | 110 kg/m² steelwork design |
| Composite metal-deck floor and lightweight concrete topping | 88–137 | Two-way spanning deck, typically 3 m span; topping up to 150 mm |
| Precast concrete composite floor and topping | 134–188 | Hollowcore planks spanning between primary steel beams |
| Fire protection, 60 minutes | 24–36 | Factory-applied intumescent coating |
| Fire protection, 90 minutes | 30–49 | Factory-applied intumescent coating |
| Large-span portal frame, low eaves | 111–146 | 6–8 m eaves; 35 kg/m² steelwork design |
| Large-span portal frame, high eaves | 135–173 | 10–13 m eaves; 45 kg/m² steelwork design |
The ranges are not interchangeable. A low-rise multi-storey frame, a high-rise frame and a portal shed embody different spans, connection demands, erection methods and steel quantities. The floor system and fire period are separate cost components, so omitting either can make a frame comparison look artificially cheap.
How does the article’s worked example add up?
For its illustrative low-rise example, Aecom combines a frame rate of £169.50/m², a composite-floor rate of £112.50/m² and £30.50/m² for 60-minute fire resistance. The arithmetic is:
£169.50 + £112.50 + £30.50 = £312.50/m².
This is an example of a cost build-up, not a tender. It excludes whatever the project-specific brief, preliminaries, abnormal connections, site constraints, inflation between the source date and procurement, and other trades require. The article says to apply the relevant BCIS location factor where appropriate. Its cited factors are from Q4 2023, so a live estimate needs the current factor and a clearly stated base date.
How should two steel-frame options be compared?
Put both options on the same measurement and design basis before drawing a conclusion. A result outside a Costing Steelwork 30 range is a prompt to investigate the drivers, not automatic proof that the estimate is wrong.
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- Fix the area basis. Confirm that both rates use gross internal floor area and define exclusions consistently.
- Record the frame assumption. Compare like with like for storey count, spans, grid, eaves or floor-to-floor height, stability system and the assumed steelwork weight in kg/m².
- Price the floor separately. State whether the build-up uses composite metal deck and topping or precast hollowcore units, including span and topping thickness.
- State the fire strategy. Identify the required resistance period and whether protection is factory-applied intumescent coating or another specified system.
- Apply location correctly. Use the project’s current BCIS or other agreed location adjustment, and record the index date rather than silently mixing dates.
- Interrogate outliers. Check unusual connection density, transfer structures, temporary works, difficult access, programme compression, coating environment and erection sequencing before accepting a low or high number.
A transparent comparison sheet should show the source, date, base index, quantities, assumptions and exclusions. That audit trail is more useful than presenting a single blended rate with false precision.
Are the 2024 numbers still suitable for a 2026 budget?
No. They can illustrate relationships between frame, floor and fire-protection components, but they should not be rolled forward mechanically. A later Costing Steelwork 36 update reports that steel-section prices had risen by around 30% in 2026 and provides separate Q2 2026 ranges. That is different source material from Costing Steelwork 30.
BCIS separately reported that structural-steelwork rates in its Major Works dataset rose 8.2% year on year in Q2 2026, while the average increase across all covered trades was 4.2%. The BCIS measures are not the same as a steel-section price movement: one is a rate dataset for structural work, the other is a material-price observation. A current estimate should use the latest appropriate index, current supplier quotations and project-specific market testing rather than treating either statistic as a universal uplift.
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Costing Steelwork 30 groups the evidence under products, specification, people and site conditions. A client should be able to follow responsibility from the design requirement through fabrication, coating, delivery, erection, inspection and handover.
1. Compliant products and factory controls
The article describes fabricated structural-steel products as requiring the applicable conformity marking and factory-production-control arrangements associated with BS EN 1090-1, supported by BS EN 1090-2 and the specified execution class. It also describes independent auditing and welding-process assessment under BS EN ISO 3834 in many cases.
That is a description of the article’s framework, not a substitute for a legal check. The UK government construction-products guidance is scoped to Great Britain and states that it does not cover Northern Ireland. Marking, designated standards, accepted conformity routes and any project-specific product requirements must therefore be checked for the jurisdiction and product concerned. Ask for current certificates, their scope, expiry dates, covered processes and the execution class; do not accept a logo or an undated declaration as proof by itself.
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2. A complete and usable specification
The steelwork package should state steel grades, member and plate requirements, tolerances, connection types, corrosion-protection system, fire-protection performance, inspection and testing, temporary conditions, interfaces and records required at handover. The National Structural Steelwork Specification for Buildings (NSSS), 7th edition, first revision is a widely used reference for setting those requirements. It should be adopted or amended deliberately, with project departures identified, rather than cited without telling the contractor which clauses apply.
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BCSA’s RQSC Buildings scheme assesses contractor capability. Its published information describes a technical assessment visit to the works, with an assessment visit every three years, covering health and safety, finance and resources as well as technical capability. Capability is expressed through a class and category.
RQSC is useful evidence, but registration is not a blanket approval for every job. Check the contractor’s current status, class and category against the proposed project’s value, building type, execution demands and technical complexity. Record the verification date and any conditions or scope limitations.
4. Named, trained role-holders
The article identifies the following functions that should have clear ownership:
- Responsible welding coordinator.
- Responsible bolting coordinator.
- Responsible painting or coating coordinator.
- Erection methods manager.
- Designated individual for temporary works.
- Technical or design manager.
For work within higher-risk-building regimes, request evidence that the appointed people have current, appropriate training and authority for their roles. Useful records include competence matrices, training and renewal dates, experience summaries, appointment letters, delegation arrangements and the escalation route when a person is absent. A named person without defined authority, time or resources is not a complete control.
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5. Site readiness and safe handover
Before erection, the contractor and principal project parties should agree a safe site handover certificate or equivalent record. Costing Steelwork 30 highlights access, suitable hardstandings, work-at-height arrangements, personal protective equipment and fall prevention. The handover should identify who has checked each condition, what remains open, the restrictions on delivery and lifting, and who may release the area for steelwork.
These arrangements support duties under health-and-safety legislation and the Building Safety Act. The government guidance on meeting building requirements explains competence duties and points separately to procedures for higher-risk buildings in England. Apply the guidance according to the project’s jurisdiction and legal status; do not assume that an English higher-risk-building process applies to a different building or nation.
What should a client request before appointing the contractor?
A proportionate pre-appointment pack can turn broad assurances into checkable evidence. Request:
- The contractor’s current company and factory-production-control certificates, with scope, execution class and expiry dates.
- Welding, bolting and coating procedures, inspection-and-test plans, non-conformance procedures and sample completion records.
- The proposed project specification, including the adopted NSSS edition, steel grades, tolerances, connections, fire and corrosion protection, and required deliverables.
- Current RQSC Buildings registration details, class and category, where the scheme is being used as part of selection.
- A project organisation chart naming the welding, bolting, coating, temporary-works, erection and technical leads.
- Training, competence and experience evidence for those individuals, including arrangements for substitution.
- An erection method statement, lifting plan, temporary-works design responsibility and interface schedule.
- A site-readiness and handover plan covering access, hardstanding, exclusion zones, work at height, weather limits, PPE, fall protection and emergency arrangements.
- A document-and-data schedule showing what will be handed over: material certificates, weld records, bolt records, coating reports, inspection results, as-built information and outstanding defects.
Information should be checked against the actual scope. A contractor may be competent for conventional building frames but not for a heavily transferred, architecturally exposed, fatigue-sensitive or unusually complex structure without additional resources and specialist controls.
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What are the common mistakes when using Costing Steelwork 30?
- Presenting a 2024 rate as a 2026 quotation. Keep the publication date and index basis beside every copied figure.
- Comparing unlike frames. A portal-frame rate, a high-rise rate and a complex-frame rate answer different design questions.
- Leaving out floors or fire protection. The article’s worked example adds these components to the frame; omitting them understates the build-up.
- Applying an old location factor without saying so. Replace the Q4 2023 factor with current data for a live estimate.
- Treating a certificate as universal. Check its scope, execution class, process coverage, validity and jurisdiction.
- Assuming an assessment scheme removes project due diligence. Confirm current RQSC class and category, then test the contractor’s people, programme and site plan against this job.
- Leaving interfaces implicit. Clarify who designs temporary works, releases foundations, verifies survey information, accepts coatings and signs the handover.
How can the evidence be kept current through the job?
Set review points rather than collecting documents once at tender. Recheck certificates and role appointments at mobilisation, confirm that substitutions receive the same competence review, and update the risk assessment when design, sequence, access or fire requirements change. At completion, reconcile the document schedule with the physical work and record non-conformances, repairs, coating data and as-built information.
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This approach gives the client an auditable trail while allowing the contractor to show capability in practical terms. It also makes a later investigation more reliable because the record identifies which person accepted which condition and when.
Bottom line
Costing Steelwork 30 is most useful as a disciplined framework, not as a current price book. Use its 2024 ranges to structure a cost comparison, preserve the 55, 90 and 110 kg/m² frame assumptions, add floor and fire components, and apply a current location and index basis. For competency, demand evidence across factory controls, a complete specification, RQSC or equivalent capability assessment, named trained personnel and a signed safe-site handover. Then refresh both the commercial data and the legal/product checks before procurement.
Frequently Asked Questions
Can I use the £312.50/m² example in a planning application or funding model?
Only as a clearly labelled historical sensitivity or early-stage benchmark. A planning or funding model should state the 2024 source date, test inflation and location assumptions, and be replaced by a current cost plan before a commitment is made.
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No. The scheme assesses a contractor organisation’s capability through its class and category, with technical, health-and-safety, financial and resource considerations. Individual role competence still needs separate appointment, training and experience evidence.
What changes if the project is in Northern Ireland?
Do not assume Great Britain construction-products guidance or marking routes apply. The government’s Great Britain guidance expressly excludes Northern Ireland, so the project team must verify the applicable Northern Ireland and UK-wide requirements for each product.
Who should sign a steelwork site handover certificate?
The project should name signatories in its responsibility matrix; typically this involves the party controlling the site conditions and the steelwork contractor’s authorised erection representative. The record should show checks, outstanding restrictions and the date of release, rather than relying on an informal email.
How often should contractor competence evidence be revisited?
Revisit it whenever scope, personnel, sequence, design risk or site conditions change, and at planned mobilisation and handover gates. Certificates and scheme registrations also need a date-and-scope check because a document can remain genuine while no longer covering the work being proposed.
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