Strength, rigidity and density characteristics
KVH® structural timber is available in the strength class C24 according to the agreement on KVH®. Strength classes C18 and C30 are available on request.
Strength class | C18 | C24 | C30 | |
| ||||
Strength values in N/mm² | ||||
Characteristic value of Bending strength | fm,ka) | 18 | 24 | 30 |
Characteristic value of Tension parallel to grain strength | ft,0,k a) | 11 | 14 | 18 |
Characteristic value of Tension perpendicular to grain strength | ft,90,k | 0.4 | 0.4 | 0.4 |
Characteristic value of Compressed parallel to grain strength | fc,0,k | 18 | 21 | 23 |
Characteristic value of Compression perpendicular to grain strength | fc,90,k | 2.5 | 2.7 | 2.7 |
Characteristic value of Shear and torsional shear strength | fv,k | 2.0 | 2.0 | 2.0 |
Stiffness values in N/mm² | ||||
Mean value of modules of elasticity parallel to grain | E0,meanb) | 9,000 | 11,000 | 12,000 |
Characteristic value of modules of elasticity | E0.05 | 6,000 | 7,400 | 8,000 |
Mean value of modules of elasticity perpenilicular to the grain | E90,mean | 300 | 370 | 400 |
Mean value of Shear modulus | Gmean | 560 | 690 | 750 |
Density values in kg/m² | ||||
Characteristic value of Density | Pk | 320 | 420 | 460 |
Mean value of density | Pmean | 380 | 420 | 460 |
a) For structural timber with rectangular cross-section and density of Pk < 700 kg/m³, the characteristic strength value can be multiplied by the coefficient
kh = min.{(150/h)0.2/1.3}
when bending cross-section heights and applying traction of h<150 mm to cross-section widths; see EN 1995-1-1: 2010-12, 3.2 (3).