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Twenty-seven tools, from the outcrop to the lab

Each tool has its own page: what you enter, what you get, the equations behind it and the standards it follows.

29Specialist tools
10Disciplines
16Live international data services
150Cited scientific references
PDFBranded reports in Arabic and English

Engineering & geotechnics

Seismic design and hazard, soils, foundations and laboratory tests.

NBedding 045/38Slope face 060/62Joint sets J1, J2Friction cone φ = 30°Planar slidingPossibleRMR 47 · Class III Engineering & geotechnics

Rock Mass Classification Lab

RMR89, Q, Q-slope and GSI with Hoek–Brown strength and deformation modulus.

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0.20.40.60.81.00.511.522.53T₀TₛSD1 = 0.40 gSDS = 0.80 gPeriod T (s)Sa (g) Engineering & geotechnics

Seismic Evaluation & Building Code

From code accelerations to design spectrum, design category and base shear.

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10⁻³10⁻²10⁻¹10⁰10¹10²45678McGutenberg–Richterb = 1.02T(M≥6) ≈ 38 yrMagnitude MN(≥M) per year Engineering & geotechnics

Seismic Hazard Explorer

A century of earthquakes around your site, turned into statistics.

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ClayClay loamLoamSilt loamSandy loamClaySandSilt Engineering & geotechnics

Global Soil Properties

SoilGrids profiles and texture for any point.

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▽ GWTQVesić · squareqall 312 kPaFS = 3BDf Engineering & geotechnics

Bearing Capacity of Shallow Foundations

Terzaghi, Meyerhof and Vesić side by side.

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στFitted envelopec = 18 kPaφ = 32° Engineering & geotechnics

Mohr Circle & Failure Envelope

Stress transformation and Mohr–Coulomb failure, interactively.

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102030405060102030405060708090100CLCHMLMHA-lineU-lineLiquid limit LL (%)Plasticity index PI (%) Engineering & geotechnics

Atterberg Limits & Plasticity

Liquid limit from the flow curve, class from the plasticity chart.

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204060801000.0010.010.1110100Fines | SandSand | GravelUSCSSW-SMCu 7.2 · Cc 1.3Particle size (mm)Percent passing Engineering & geotechnics

Grain-Size Analysis

Sieve data to gradation curve, USCS class and Folk & Ward statistics.

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