The Haul Road Instruction: Variation, Time Bar and Extension of Time
A 24-storey composite residential tower in Kowloon is being built under the HKIA Standard Form of Building Contract with quantities. The contract sum is HK$680 million, completion is due on 30 June 2026, and liquidated damages are HK$80,000 per day, capped at 10% of the contract sum. During basement excavation, the architect issues a site instruction requiring the contractor to relocate its temporary haul road so that the employer's separate piling contractor can gain access. The contractor complies, incurs HK$2.3 million in additional temporary works and loses 18 days on the critical path. Forty days after the instruction, the contractor submits a notice and claim for an extension of time and HK$2.3 million. The contract requires notice within 28 days of an instruction. The employer says the instruction was merely 'coordination', not a variation, and refuses to pay. The architect must now administer the instruction and the claim.
1. Was the site instruction a variation, or something else? Explain how you would characterise it and why the label matters.
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The label matters because it determines the contractual mechanism: a variation engages the valuation and extension-of-time provisions; a breach or prevention engages damages and the prevention principle; a mere coordination instruction may engage neither. On the facts, the instruction changed the contractor's temporary works and was given by the architect under the contract. Even if it is not a 'variation' in the narrow sense, it is an instruction the contractor was bound to comply with, and it arose from the employer's decision to bring a separate contractor onto the site. The employer cannot both require compliance and deny all consequence. The architect should look at substance, not label: did the instruction alter the works, the sequence or site access? Here it did all three. The architect should therefore treat it as an instruction with cost and time consequences, either as a variation or as an employer-risk event. The architect should record the analysis in writing and not simply adopt the employer's characterisation.
2. The contractor's notice was 12 days late. How should the architect deal with the time-bar argument, and what risks arise if the architect simply rejects the claim?
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Late notice does not automatically extinguish a claim, but the architect must apply the contract. If the contract makes the 28-day notice a condition precedent, the contractor's failure is serious. However, the architect should check: whether the notice provision applies to this type of instruction; whether the employer or architect waived the time bar by dealing with the claim on its merits; whether the instruction itself was given late or the need arose from employer-side coordination; and whether the delay in notice prejudiced the employer. A blanket rejection risks an adjudication or arbitration finding that the architect acted unfairly or that the employer waived the requirement. The architect should write to the contractor identifying the late notice, ask for reasons, and reserve rights, while still investigating the merits. The architect should not use the time bar as a shortcut to avoid assessing a genuine employer-risk event. A balanced approach protects the employer's position and the architect's independence.
3. If the contractor is entitled to relief, outline how the architect should value the HK$2.3 million and assess the 18-day delay.
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Value the additional temporary works under the contract's valuation rules. First check whether the bills of quantities contain rates for temporary haul roads or for relocating site access; if so, apply those rates. If not, require a detailed breakdown of the HK$2.3 million: plant, labour, materials, subcontractor costs, overheads and profit. Test whether the costs were actually incurred and are reasonable; compare with market rates and with the contractor's tender allowances. Do not simply accept the lump sum. For time, assess the 18-day delay against the accepted programme: was the haul-road relocation on the critical path, and for how long? Consider concurrent delay and mitigation. If the delay is employer-risk, certify an extension of time of 18 days, or the properly evidenced period, and relieve liquidated damages accordingly. If the instruction is a variation, issue a valuation and include it in the next interim certificate, with records of the assessment.