Info

a4,c

180° < a < 360°

0.6dc

0.6dc

0.6dc

ta is the angle between the direction of the connector force and the grain.

ta is the angle between the direction of the connector force and the grain.

t t

Fig. 11.2. Dimensions for connections with toothed-plate connectors.

the load-grain angle, however as the lateral strength of the connector bolt is a function of the angle of load relative to the grain, the strength of the toothed-plate connection will be dependent on the load-grain angle.

The characteristic load-carrying capacity of the connector, Fv Rk, has been determined from tests on joints [3], and to ensure that a brittle failure does not occur the minimum member thicknesses permitted in EC5 are:

• outer timber members: 2.25he

• inner timber member: 3.75he where he is the embedment depth and is shown for a double-sided toothed-plate connector in Figure 11.2.

Density and loaded end distance criteria were also included in the test programme and from a review of the results EC5 has adopted the relationships for the characteristic load-carrying capacity, Fv Rk, per toothed-plate connector given in equation (11.4):

I18k1k2k3d^5 for single-sided types

25k1 k2k3 dc for double-sided types

where:

Fv>Rk is the characteristic load-carrying capacity of the toothed-plate connector (in N).

- the toothed-plate connector diameter for types C1, C2, C6, C7, C10 and C11 (in mm),

- the toothed-plate connector side length for types C5, C8 and C9 (in mm),

- the square root of the product of both side lengths for types C3 and C4 (in mm). k1 is a modification factor for the effect of member thickness:

0 0

Post a comment