A site off Lakeshore Drive with its sandy overburden bears little resemblance to a property perched on the crystalline rock outcrops near Airport Hill. In North Bay, a few hundred meters can shift your foundation design from shallow footings on bedrock to deep piles through compressible silts. The Standard Penetration Test (SPT) bridges this uncertainty. Our drilling program records N-values every 1.5 m through the overburden, directly feeding into bearing capacity calculations under NBCC 2015 and CSA A23.3. For sites where the glacial stratigraphy is complex, we often pair the SPT with a CPT program to capture continuous tip resistance and sleeve friction through the softer layers before the refusal horizon.
In the Nipissing Basin's layered deposits, a single corrected N60 profile replaces three days of guesswork on footing depth.
