Sample data from Engineering Database — 375 reference tables, deterministic calculators, and Engineering AI. Sign up free
Pavement Aashto: crushed stone base
AASHTO pavement design material properties including layer coefficients, drainage coefficients, and modulus values for flexible and rigid pavement design
| material id | description | drainage coefficient max (dimensionless) | drainage coefficient min (dimensionless) | layer coefficient | layer type | material name | max thickness in | min thickness in (in) | standard | typical modulus MPa (MPa) | typical modulus psi (psi) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| crushed stone base | Crushed aggregate base course (CBR >= 80) | 1.4 | 0.4 | 0.14 | base | Crushed Stone Base | 12 | 4 | AASHTO Guide for Design of Pavement Structures (1993) | 207 | 30,000 |
What else is in Engineering Database
Iron Engine ↗Engineering AI at ironengine.ai
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators