A five-story commercial building going up near the Saint-François River needed hard data fast. That project is typical of what we handle here in Drummondville every month. The SPT gives us a direct read on soil resistance at depth using a standard 63.5 kg hammer dropping 760 mm. We record blow counts every 300 mm to produce a clear N-value profile. This raw data feeds directly into bearing capacity calculations for shallow and deep foundations. Before any spread footing or pile design moves forward, we run the SPT to confirm what the soil actually delivers. Combining the SPT with a dilatometer test adds lateral stiffness data when the design calls for it, and a MASW survey complements the point measurements with vs30/" data-interlink="1">shear wave velocity profiles across the site.
Corrected N60 values from the SPT remove equipment variability and give engineers a true picture of soil strength at every depth tested.