Collapse of an Uncertified Grain Silo
A 500-tonne flat-bottom grain silo at a farm in Gombe State collapsed during first loading, killing two workers and injuring three. The silo was fabricated and erected by AgriSteel Fabricators, which holds no COREN engineering-firm registration. The company's site supervisor is an engineering technician; the drawings carry the seal and signature of a registered engineer who says he 'reviewed the catalogue design' but never visited the site. The design was copied from a foreign brochure without foundation or wind-load checks for local conditions. Welds were not inspected; the concrete ring beam shows honeycombing. The state government has ordered the site sealed and wants prosecution within 30 days. The farm owner says he chose AgriSteel because it was 40% cheaper and 'COREN registration was not requested in the tender'. COREN's investigation team must decide immediate and longer-term action.
1. Identify the regulatory breaches and the parties responsible.
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AgriSteel Fabricators. The company carried out engineering design and erection without firm registration. That is a fundamental breach: a firm offering engineering services must be registered, and its engineering work must be under a registered engineer. Using a technician as site supervisor for structural works compounds the breach.
The registered engineer. Sealing drawings imposes responsibility for the design. A desk review of a catalogue design, without site verification, foundation checks or wind-load assessment, is not adequate. The seal was used to give an appearance of professional approval that the work did not receive. This is a professional-conduct issue as well as a technical failure.
The technician. A technician may supervise within competence and under direction, but cannot take responsible charge of structural design and erection. The title does not authorise independent engineering judgement.
The farm owner and tender process. The owner's claim that registration was not requested does not make unregistered practice lawful, but it explains how the risk entered the project. A private buyer still has a duty to verify that the provider is competent and registered.
Technical findings. The absence of foundation and wind-load checks, uninspected welds and honeycombed concrete are evidence that the design and construction control failed, not merely that an accident occurred.
2. Set out the enforcement sequence COREN should follow, including interim measures.
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Immediate preservation. The state has sealed the site; COREN should secure the drawings, calculation files, welding records, purchase documents and correspondence before they are lost. Inspectors should photograph the failed silo and ring beam and record witness statements.
Interim stop. COREN should issue a stop notice preventing AgriSteel from undertaking further engineering work and preventing further loading or repair without a registered engineer's design. If there is imminent danger at other sites, those should be inspected.
Investigation and due process. The team should prepare a factual report, invite the engineer, the technician and AgriSteel to respond, and refer the registered engineer to the disciplinary process. The firm cannot be registered retrospectively to validate the work.
Enforcement options. These include prosecution for unregistered practice, suspension or withdrawal of the engineer's licence or registration, publication of the outcome, and referral to the police or attorney-general for the deaths. Coordination with the state government and the coroner is essential.
Timeline. A preliminary report within days is realistic; a full disciplinary or prosecutorial process within 30 days may not be. COREN should not promise a prosecution it cannot deliver. It should publish the interim measures and explain the process.
3. Recommend procurement and verification changes to prevent recurrence, and address the farm owner's claim.
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The owner's claim. 'COREN registration was not requested' is an explanation, not a defence. Unregistered practice is prohibited by law regardless of what a private tender says. The owner also bears commercial and safety consequences: a cheaper fabricator transferred risk to workers and to the business.
Tender clauses. All silos, sheds, irrigation works and agro-processing structures should require a registered engineering firm, a named registered engineer with relevant experience, and evidence of current practising licences. The clause should permit verification with COREN and require notification of any change of personnel.
Technical controls. Critical structures need independent design review, foundation and wind-load calculations for the site, welding inspection and concrete testing. A hold point should prevent loading until the registered engineer issues a completion certificate.
Market measures. COREN can publish a register of firms and engineers and encourage farm associations, insurers and lenders to require registration. Insurers can refuse cover for unapproved structures. State agencies can include compliance checks in permits.
Deterrence. Publicising enforcement outcomes, including this case, will do more than a circular. Buyers need to see that the 40% saving was a false economy.