Queensland Art Gallery External Works
Structural investigation of Queensland Art Gallery external works to establish concrete thickness, reinforcement placement, spacing, cover, and estimated bar diameters for engineering design and planning.
Scope
As-built detailing of footpath slabs, walls, and stair landings (Areas 7, 8, and 13), including void documentation and reinforcement mapping.
Challenge
The consultant team needed reliable as-built structural data across several external zones where available drawings were incomplete and field certainty was low. Because works were within a sensitive heritage precinct, the approach needed to minimize unnecessary invasive opening-up while still producing evidence engineers could design from with confidence.
Approach
SiteOps delivered a focused GPR programme over the nominated areas, then correlated scan results into clear markups and report outputs for each structural element type. The methodology prioritized reinforcement location, cover, spacing, and void risk identification so design decisions could be made early and with fewer assumptions.
Outcome
The project provided consultant-ready as-built evidence that reduced design uncertainty before intrusive works. The resulting documentation improved staging and scope definition for remediation and external upgrade planning.
Investigation data
Key findings
Reinforcement location and cover were confirmed across all nominated investigation zones
Local variability in bar spacing and arrangement was identified between nominally similar elements
Voids and anomalies were documented in targeted areas for follow-up design checks
As-built outputs supported design progression without broad demolition-style probing
Report pack provided a consistent evidence base for multidisciplinary coordination
Further reading
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