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Nail pointside penetration, tpen

tpen — ¿nail t1

îpen = 25 mm

Minimum penetration of nail in inner member, tpoint.pen (10.3.5.1(1) (EC5, 8.3.1.2(1)))

tpoint.pen — 8 ' d ^omt.prn _ 0 8S tpen

îpoint.pen = 2l.2mm ratio less than 1, i.e.

Pentration of nail into timber support member in terms of nail diameter, coeff

Minimum nail penetration criteria met

2. Timber and plywood properties

Table 1.3, strength class C18 (BS EN 338:2003(E), Table 1)

Characteristic density of the timber, pk pk = 320kg/m3

Plywood:

Characteristic density of the plywood

3. Partial safety factors

Material factor for connections

4. Actions

Design action per metre length of the plywood at the support, Fax d

5. Modification factors

Factor for instantaneous duration loading and service class 3, £mod,inst (Table 2.4 (EC5, Table 3.1))

6. Tensile strength of the connection

Because there is no permanent or long-term axial loading on the connection, smooth nails can be used(EC5, 8.3.2(1))

Characteristic pointside withdrawal strength, /ax.k (10.8.1 (EC5, 8.3.2(6), (7)))

Assuming the connection may be in a condition where it is installed near its fibre saturation point. (The equation incorporates dimension factors for Mathcad.)

Pointside penetration factor, Dp

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