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/ o n -a0-5 Aef = (a2 + n ■ - ■ a?] Aef = 69.74

2. Timber strength properties

Table 1.3, strength class C22 (BS EN 338:2003(E), Table 1)

Characteristic compression strength /c.0.k = 20 N/mm2 parallel to the grain, /c 0 k

Fifth-percentile modulus of elasticity parallel to the grain, E0.05

Characteristic tensile strength perpendicular to the grain, /t 90 k

Characteristic shear strength across the grain, /v.k

E0.05 = 6.7kN/mm2 /t.90.k = 0.5 N/mm2 /v.k = 2.4 N/mm2

3. Partial safety factors

Table 2.8 (UKNA to BS EN 1990:2002, Table NA.A1.2(B)) for the ULS

Permanent actions, yg Yg = 1-35

Variable actions, yq Yq = 1.5 Table 2.6 (UKNA to EC5, Table NA.3)

Material factor for solid timber, ym Ym = 1.3

0 0

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