Nominal values of yield strength fy and ultimate strength fu of structural steels
| Steel grade by EN10025-2 | Thickness of element t (mm) | |||
| t <= 40 mm | 40 mm < t <= 80 mm | |||
| fy[N/mm2] | fu[N/mm2] | fy[N/mm2] | fu[N/mm2] | |
| S 235 | 235 | 360 | 215 | 360 |
| S 275 | 275 | 430 | 255 | 410 |
| S 355 | 355 | 490 | 335 | 470 |
| S 450 | 440 | 550 | 410 | 550 |
Nominal values of yield strength fyb and ultimate strength fub for bolts
| Screw quality grade | 4.6 | 4.8 | 5.6 | 5.8 | 6.8 | 8.8 | 10.9 |
| fyb[N/mm2] | 240 | 320 | 300 | 400 | 480 | 640 | 900 |
| fub[N/mm2] | 400 | 400 | 500 | 500 | 600 | 800 | 1000 |
Design values of physical quantities of steels
| Volumetric weight | ρ = 7 850 Kg/m3 |
| Tensile and compressive modulus of elasticity | E = 210 000 N/mm2 |
| Shear modulus of elasticity | G = 81 000 N/mm2 |
| Coefficient of transverse deformation in the elastic region | ν = 0,3 |
| Coefficient of longitudinal thermal expansion | α = 12 . 10-6/K (pro T <= 100 oC) |
Classes and mechanical properties of concrete
| class of concrete | compressive strength | tensile strength | modulus of elasticity | |
| fck | fcm | fctm | Ecm | |
| MPa | MPa | MPa | GPa | |
| C 12/15 | 12 | 20 | 1,6 | 26 |
| C 16/20 | 16 | 24 | 1,9 | 27,5 |
| C 20/25 | 20 | 28 | 2,2 | 29 |
| C 25/30 | 25 | 33 | 2,6 | 30,5 |
| C 30/37 | 30 | 38 | 2,9 | 32 |
| C 35/45 | 35 | 43 | 3,2 | 33,5 |
| C 40/50 | 40 | 48 | 3,5 | 35 |
| C 45/55 | 45 | 53 | 3,8 | 36 |
| C 50/60 | 50 | 58 | 4,1 | 37 |