Page 48 - Handbook of Structural Steel Connection Design and Details

Fasteners and Welds for Structural Connections

Fasteners and Welds for Structural Connections 33

The effects of the skew on the effective throat of a fillet weld can be very
significant as shown in Fig. 1.16. Figure 1.16 also shows how fillet legs W
o
and W are measured in the skewed configuration. On the acute side of the
a
connection the effective throat for a given fillet weld size gradually
increases as the connection intersection angle, Φ, changes from 90 to 60°.
From 60 to 30°, the weld changes from a fillet weld to a partial joint

Φ
60° ≤ Φ ≤ 90°

Acute side
w

w
t e

g
Skewed fillet welds
Φ
W = t e 2 sin 2 + g
a
(a)

Φ
Obtuse
side 90° ≤ Φ ≤ 135°
t
w

w
t e
g
Skewed fillet welds

Φ
W o = t 2 sin 2 + g
e
(b)
Figure 1.16 Geometry of skewed fillet welds. (Relationship of
weld size to effective throat, t ) (a) acute side (b) obtuse side.
e
Note how the skewed fillet welds are to be measured. The con-
tact leg length is not the weld size.

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