Usd

mean. fin

E 2p.mean.fin + E 1mean.fin

Emean.fin = 5.46kN/mm2

Final mean value of the stiffness of each Kfin = fastener, Kfin

E 1q mean

Adopting the symbols used for profile (e) in Figure 8.2

Width of plywood section, member 2, h2

Thickness of each plywood flange, member 2, h h = 12 mm

Width of the timber section, member 1, h 1 = 50 mm hi

Clear distance between the inside faces b = h 2 - 2 ■ h1 of members 2, b b 200 mm

Check the effective flange width of the panel (7.3.2.1 (EC5, 9.1.2))

In compression, b1c ef (Table 7.2 (EC5 b1c ef = min(0.1 ■ Le z, 25 ■ h)

" b1c,ef = 240 mm i.e the value is based on plate buckling criteria

As the width exceeds the clear distance between members 2, the full width of the section flange can be used in the design.

Also, check on the buckling length of -= 0.5 the value is less than 1;

the compression flange - based on plate 2 ' b therefore OK

buckling criteria

Combined thickness of plywood b2 = 24 mm members 2, h1

Depth of timber member, 1, b1 b1 = 100 mm

VEA of the section, EAcM EAcM = (2 ■ E 1mean.fin ■ b1 ■ h1 + E2p.mean.fin ■ b2 ■ h2)

Properties of section about the y-y axis:

Connection efficiency factor, yy1 (equation 8.3; EC5, equation (B.5))

Effective bending stiffness about the y-y axis, E/c.ef.y (Table 8.1)

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