Aluminium Design and Construction John Dwight

Table 11.6 Limiting stress p w (N/mm 2 ) for MIG or TIG weld metal
The weld throat dimension g is defined as the minimum dimension
through the weld metal, measured from root to outer surface and ignoring
any reinforcement or convexity (Figure 11.7). Any penetration into the
preparation at a butt or at the root of a fillet would also be ignored,
unless clearly specified.
The factor a depends on the angle � between the line of action of the
transmitted force and the assumed failure plane (the weld throat in this
case). Figure 11.8(a) shows how � is measured, while the curve in Figure
11.9 gives the variation of a with �. The equation to this curve is:
Figure 11.7 Weld dimensions g and h.
(11.16)
Figure 11.8 Definition of angle �: (a) weld metal failure; (b) fusion boundary failure.
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