Do I Need a Geotechnical Report? | Apex Grid Engineering

Quick Answer

Do I Need a Geotechnical Report?

Most commercial construction projects require a geotechnical report. Building departments typically require geotechnical investigation before approving foundation design for new construction, additions, and some renovation projects. The structural engineer needs the geotechnical report to design the foundation — so geotechnical should be ordered early.

Projects That Typically Require a Geotechnical Report

New commercial construction — virtually always required
Additions with new foundations
Parking lot construction in many jurisdictions
Retaining walls above certain height thresholds
Sites with known soil problems — expansive soils, fill, high groundwater
Projects with significant grading or earthwork
Some tenant improvements with new concentrated loads

Projects That May Not Require Geotechnical

Tenant improvements with no foundation work
Small additions on sites with recent geotechnical reports
Jurisdictions that allow presumptive bearing values in some cases
Consult with your structural engineer and local building department to confirm

What a Geotechnical Report Provides

Soil boring logs documenting subsurface conditions
Allowable bearing pressure for foundation design
Foundation type recommendations — spread footings, deep foundations
Expansive soil evaluation and mitigation recommendations
Groundwater depth and seasonal variation
Compaction recommendations for earthwork
Pavement subgrade recommendations if applicable

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Request a Geotechnical Investigation Proposal 480-490-0064