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Material Properties
Reference library of structural material properties — concrete, reinforcing and structural steel, timber, masonry and aluminum. Every value cites its code clause. Characteristic values only; apply your project's partial factors and National Annex.
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Properties — C30/37
| Symbol | Property | Value | Unit |
|---|---|---|---|
| fck | Characteristic cylinder compressive strength EC2 Table 3.1 | 30 | MPa |
| fck,cube | Characteristic cube compressive strength EC2 Table 3.1 | 37 | MPa |
| fcm | Mean cylinder compressive strength (fck + 8) EC2 Table 3.1 | 38 | MPa |
| fctm | Mean axial tensile strength EC2 Table 3.1 | 2.90 | MPa |
| fctk,0.05 | 5% fractile tensile strength (0.7·fctm) EC2 Table 3.1 | 2.03 | MPa |
| fctk,0.95 | 95% fractile tensile strength (1.3·fctm) EC2 Table 3.1 | 3.77 | MPa |
| Ecm | Secant modulus of elasticity, 22·(fcm/10)^0.3 GPa EC2 Table 3.1 | 32,837 | MPa |
| εc1 | Compressive strain at peak stress fcm EC2 Table 3.1 | 2.16 | ‰ |
| εcu1 | Ultimate compressive strain EC2 Table 3.1 | 3.50 | ‰ |
| εc2 | Strain at fcd plateau (parabola-rectangle) EC2 Table 3.1 | 2.00 | ‰ |
| εcu2 | Ultimate strain (parabola-rectangle) EC2 Table 3.1 | 3.50 | ‰ |
| n | Exponent of parabola-rectangle diagram EC2 Table 3.1 | 2.00 | — |
| εc3 | Strain at fcd (bilinear diagram) EC2 Table 3.1 | 1.75 | ‰ |
| εcu3 | Ultimate strain (bilinear diagram) EC2 Table 3.1 | 3.50 | ‰ |
| fcd | Design compressive strength (αcc = 0.85, γc = 1.5) EC2 §3.1.6(1) | 17.00 | MPa |
| fctd | Design tensile strength (αct = 1.0, γc = 1.5) EC2 §3.1.6(2) | 1.35 | MPa |
Ecm, fctm and the strain limits are computed from the analytical relations of EN 1992-1-1 Table 3.1; the printed table rounds them (fctm to 0.1 MPa, Ecm to 1 GPa). Design values use αcc = 0.85 and γc = 1.5— the convention used across this site's RC tools; both are Nationally Determined Parameters.
Deliberately Omitted
- Glulam GL22h / GL26h: Classes exist in EN 14080:2013 but their stiffness/density table values could not be verified against a reliable reproduction of the standard; omitted rather than approximated.
- Glulam GL36h: Not a class of EN 14080:2013 — it belonged to the superseded EN 1194 and is no longer producible/declarable under the current standard.
- Hardwood timber classes (D18–D70): EN 338:2016 D-class values not verified; softwood C-classes cover the vast majority of structural use.
- Aluminum: EC9 values for 6060/6063/6005A/5083/7020: EN 1999-1-1 Table 3.2b values for these alloys could not be verified from an accessible copy of the table; only verified alloys are listed. 6063 is covered on the ASTM side.
- Masonry: tabulated fk per unit product: Unit strength is manufacturer-specific. The EC6 §3.6.1.2 model (K table + equations) is provided instead; K values are EN recommendations — check your National Annex.