Table 3: Materials mechanical properties.

Steel Wood
Young’s modulus (MPa) 210000 6500
Poisson ratio 0.3 0.3
Shear modulus (N/mm2) 807.7 2450
Density (kg/m3) 7850 600
Coefficient of thermal expansion (°C-1) 1,70·10-5 6,00·10-6
Maximum allowable stress (N/mm2) 100 20