MetFab - Air Products Welder's Handbook - Flipbook - Page 41
Leg length (z)
A fillet weld’s size is defined by throat
thickness (a) or leg length (z).
Throat thickness (a)
The ideal relation between throat thickness
and leg length is given in the following
formula and is shown in the table below z = √2 * a.
a-size
(mm)
z-size
(mm)
Weld surface
(mm2)
2
2.8
4.0
2.5
3.5
6.3
3
4.2
9.0
3.5
4.9
12.3
4
5.7
16.0
5
7.1
25.0
6
8.5
36.0
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