## AS 1720.1-2010 Table 4.10(A)

## AS 1720.1-2010 Table 4.10(A)

(OP)

In Table 4.10(A), for "Two member", the effective timber thickness b_eff is given as 2 x t_1 for use to determine the characteristic capacity. I could not figure out the reason for this value being 2 x t_1 instead of t_1. Does anyone know the reason for the use of "2 x t_1"?

## RE: AS 1720.1-2010 Table 4.10(A)

## RE: AS 1720.1-2010 Table 4.10(A)

b_eff = 2 x t_1

System capacity Q_skp = Q_kp, so no 0.5 factor in the System capacity Q_skp to scale back the thickness.

## RE: AS 1720.1-2010 Table 4.10(A)

I suspect overall the effect is due to some double curvature in the bolts bearing on the timber where the thickness of the second timber can govern or at least influence the behaviour.

## RE: AS 1720.1-2010 Table 4.10(A)

## RE: AS 1720.1-2010 Table 4.10(A)