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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.

Technical data of finger-jointed structural timber for selected strength classes

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).