Structural assessment · Trois-Rivières
Structural assessment in Trois-Rivières
Structural assessment evaluates the condition of a concrete structure with non-destructive test methods, before a repair, an alteration or a regulatory verification in Trois-Rivières. Documenting the condition of a structure before deciding on work, rather than after announcing it.
Trois-Rivières
Working in Trois-Rivières
An assessment answers a question put by an engineer or a manager, it does not produce a general verdict. In Trois-Rivières, when what follows involves an alteration subject to a municipal process, a documented survey helps describe the work rather than assume it. State the area to cover, the grid spacing expected and the deliverable format. Earlier drawings and reports, even incomplete ones, guide the survey and avoid redoing what already exists.
In Trois-Rivières, some light work does not require a building permit, yet a work declaration remains mandatory before starting. It is free of charge and can be filed by whoever carries out the work, with written authorization from the owner. Before coring or opening a slab, check which side your work falls on.
Preparing your project in Trois-Rivières
- State the question the survey has to answer, and who is asking it
- Outline the area to cover and the expected grid spacing on a drawing
- Gather earlier drawings and reports, even partial ones
Non-destructive test methods
The American Concrete Institute report ACI 228.2R-13 reviews non-destructive test methods for in-place concrete, including visual inspection, stress-wave, magnetic and electrical methods, infrared thermography and ground-penetrating radar.
Parking garages in Quebec
In Quebec, the Building chapter of the Safety Code requires parking garage owners to carry out a visual verification every year and, every five years, to obtain an in-depth verification report from an engineer. Non-destructive surveys can document the condition of the concrete in support of these verifications.
- Before repairing or strengthening a slab
- Before a change of use or an alteration
- When monitoring a parking garage
- After cracks or spalling appear
Complementary methods
An engineer may specify acoustic, electrochemical or ultrasonic tests, or targeted samples. GPR does not answer every condition-assessment question.
Methods described in technical references are not automatically included in a ScanAxis assignment. Scope and availability must be specified in the quote.
Survey and report
Agree on objectives, critical zones, available drawings and access. The measurement grid should match the decision being considered.
Define the methodology, maps, observations, limitations, delivery format and schedule required before work begins.
What the assessment does not replace
Estimated thickness and rebar locations alone do not establish load-bearing capacity. A survey does not replace structural calculations or an engineer’s conclusions.
Provide results to the professionals responsible for any change in loading, strengthening or repair.
Frequently asked questions
Does a structural assessment replace an engineer’s opinion?
No. Non-destructive tests provide data on the condition of the concrete; structural interpretation and recommendations are an engineer’s responsibility, as the Safety Code provides for parking garages, for example.
Which structures can be assessed?
Usually reinforced concrete slabs, walls, columns, beams and parking garages, in commercial, industrial, institutional or residential buildings.
Does an assessment replace an engineer’s opinion?
No. It provides observations and their limits, which the engineer interprets to conclude. The survey documents, it does not rule on capacity or on the repair to choose.
What if the original drawings cannot be found?
The survey is then framed on what can be observed and on the question asked. Mention the missing drawings in your request: it changes the grid used and what the report can state.
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