L

Radius of gyration about the z-z axis, iz iz =

Slenderness ratio about the z-z axis, Xz

2. Timber and bolt strength properties

Table 1.3, strength class C24 (BS EN 338:

Characteristic bending strength, /m k Characteristic shear strength, /v k

2003(E), Table 1) fmk = 24.0 N/mm2 fv.k = 2.5 N/mm2

Characteristic compression strength parallel to the grain, /c.0.k

Characteristic compression strength perpendicular to the grain, /c.90.k

Characteristic density of the timber, pk

Mean density of the timber, pm

Mean modulus of elasticity of the timber parallel to the grain, E0.mean Fifth percentile modulus of elasticity of the timber parallel to grain, E0.05

pk = 350kg/m3 Pm = 420 kg/m3 £o.mean = 11.0 X 103 N/mm2

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