Blog
Practical engineering resources with formulas, examples, assumptions, limitations, and clear internal links to related calculators.
5 min
CBR Test Explained
CBR test explained for pavement subgrade and base support evaluation.
5 min
Compaction Testing Explained
Compaction testing explained for field density, moisture control, and earthwork quality.
5 min
Concrete Volume Calculation
Concrete volume calculation explained for slabs, footings, and rectangular placements.
5 min
Culvert Sizing Basics
Culvert sizing basics, including inlet control, outlet control, slope, tailwater, and debris.
5 min
How to Estimate Concrete for a Slab
How to estimate concrete for a slab with thickness, waste factor, and field tolerance checks.
5 min
Manning's Equation Explained
Manning's equation explained for open channel flow, velocity, discharge, roughness, and slope.
5 min
Open Channel Flow Basics
Open channel flow basics for civil drainage design and field review.
5 min
Proctor Test Explained
Proctor test explained, including maximum dry density, optimum moisture, and field compaction control.
5 min
Roadway Subgrade Explained
Roadway subgrade explained for pavement support, moisture sensitivity, compaction, and stabilization.
5 min
Stormwater Drainage Basics
Stormwater drainage basics for site grading, runoff, conveyance, and erosion control.
5 min
Active, Passive, and At-Rest Earth Pressure
Active, passive, and at-rest earth pressure explained for retaining walls and braced excavations.
5 min
Cohesion and Friction Angle Explained
Cohesion and friction angle explained as soil strength parameters for geotechnical calculations.
5 min
Expansive Clay Soil Explained
Expansive clay soil explained, including shrink-swell behavior, moisture changes, and foundation implications.
5 min
Factor of Safety in Slope Stability
Factor of safety in slope stability explained with interpretation, uncertainty, and practical use.
5 min
How Drainage Affects Retaining Walls
How drainage affects retaining walls and why water pressure often controls wall distress.
5 min
How to Read a Geotechnical Report
How to read a geotechnical report, including borings, lab data, groundwater, recommendations, and limitations.
5 min
Soil Unit Weight Explained
Soil unit weight explained for geotechnical calculations, including total, dry, saturated, and effective unit weight.
5 min
Terzaghi Bearing Capacity Explained
Terzaghi bearing capacity equation explained with terms, assumptions, and practical limitations.
5 min
Ultimate vs Allowable Bearing Capacity
Difference between ultimate and allowable bearing capacity, including factors of safety and serviceability limits.
5 min
USCS Soil Classification Explained
USCS soil classification explained with coarse/fine fractions, plasticity, and engineering interpretation.
5 min
What Is an Infinite Slope Model?
Infinite slope model explained for shallow planar slope stability screening.
5 min
What Is Bearing Capacity?
Bearing capacity explained for shallow foundations, including ultimate capacity, allowable pressure, settlement, and field checks.
5 min
What Is Plasticity Index?
Plasticity index explained for soil classification, clay behavior, and geotechnical interpretation.
5 min
What Is Undrained Shear Strength?
Undrained shear strength explained for saturated clays and short-term stability checks.
5 min
Why Retaining Walls Fail
Why retaining walls fail, including drainage, surcharge, sliding, overturning, bearing, and construction issues.
5 min
Do You Need a Soil Report Before Building?
When a soil report is needed before building and what information it provides.
5 min
How Poor Drainage Damages Foundations
How poor drainage damages foundations through soil softening, erosion, expansive clay movement, and wall pressure.
5 min
How to Tell If a Slope Is Moving
How to recognize possible slope movement using cracks, scarps, bulging, seepage, and tilted features.
5 min
Should You Buy a House With Foundation Repairs?
How to think about buying a house with foundation repairs, including documentation, cause, and performance.
5 min
Signs of Expansive Clay Around Your Home
Signs of expansive clay around a home, including seasonal movement, cracks, and drainage clues.
5 min
What Causes Basement Wall Bowing?
Basement wall bowing explained, including lateral earth pressure, water pressure, expansive soil, and surcharge.
5 min
What Does a Geotechnical Engineer Do?
What a geotechnical engineer does for foundations, slopes, retaining walls, pavements, and site development.
5 min
When Should You Worry About Retaining Wall Cracks?
Retaining wall crack warning signs explained for homeowners and contractors.
5 min
Why Is My Foundation Cracking?
Foundation cracks explained for homeowners, including soil movement, drainage, settlement, and when to seek evaluation.
5 min
Why Soil Erosion Happens in Backyards
Backyard soil erosion explained with runoff, slope, vegetation, concentration of flow, and soil type.
5 min
Common Soil Mechanics Equations
Common soil mechanics equations with practical notes on phase relationships, effective stress, seepage, compaction, and strength.
5 min
FE Civil Geotechnical Formulas
FE Civil geotechnical formulas organized for bearing capacity, effective stress, compaction, seepage, and soil classification.
5 min
How to Study Retaining Wall Problems
How to study retaining wall problems for PE Civil and engineering review.
5 min
PE Civil Geotechnical Study Guide
PE Civil geotechnical study guide for foundations, slopes, retaining walls, seepage, and earthwork.
5 min
Slope Stability Concepts for PE Civil
Slope stability concepts for PE Civil, including factor of safety, pore pressure, failure surfaces, and strength selection.
5 min
Bearing Capacity Calculation Example
Worked bearing capacity example showing terms, units, allowable pressure, and interpretation.
5 min
Concrete Slab Volume Example
Worked concrete slab volume example with thickness conversion and waste factor.
5 min
Factor of Safety Example
Worked factor of safety example showing resistance-demand interpretation.
5 min
Infinite Slope Stability Example
Worked infinite slope stability example with slope angle, soil thickness, cohesion, friction, and pore pressure.
5 min
Manning's Equation Example
Worked Manning equation example calculating channel velocity and discharge.
5 min
Retaining Wall Active Pressure Example
Worked active earth pressure example using Rankine Ka, triangular soil pressure, and surcharge pressure.
5 min
Settlement Calculation Example
Worked settlement calculation example explaining stress increase, compressible layer thickness, and serviceability.
5 min
Soil Classification Example
Worked USCS soil classification example using gradation and Atterberg limits.
5 min
Surcharge Load on Retaining Wall Example
Worked surcharge load example for retaining wall lateral pressure.
5 min
Unit Weight Conversion Example
Worked unit weight conversion example between pcf and kN/m3.