Civil Engineering Reference
In-Depth Information
L
t
L
L
b
1
1
w
we
F
t,Ed
F
t,Ed
b
t
1
t
b
1
L
L
L
1
w
we
F
t,Ed
F
t,Ed
t
1
b
t
b
1
L
2
F
c,Ed
F
c,Ed
b
t
1
L
L
L
2
w
we
The smaller of
L
we
≥
0.75
b
and 0.75
b
For build-up members in tension:
The smallest of
L
1
≤ 16
t
and 16
t
1
and 200 mm
For build-up members in compression or shear:
The smallest of
and 200 mm
Figure 3.35 Intermittent fillet welds specified in EC3 (BS EN 1993-1-8) [2.13].
L
2
≤
12
t
and 12
t
1
and 0.25
b
as the smaller of the distances between the ends of the welds on opposite
sides and the distance between the ends of the welds on the same side. In
any run of intermittent fillet weld, there should always be a length of weld
at each end of the part connected. In a built-up member in which plates are
connected by means of intermittent fillet welds, a continuous fillet weld
should be provided on each side of the plate for a length at each end equal
to at least three-quarters of the width of the narrower plate concerned as
shown in
Figure 3.35
. Fillet welds all round, comprising fillet welds in cir-
cular or elongated holes, may be used only to transmit shear or to prevent the
buckling or separation of lapped parts. The diameter of a circular hole, or
width of an elongated hole, for a fillet weld all round should not be less than
four times the thickness of the part containing it. The ends of elongated holes
should be semicircular, except for those ends that extend to the edge of the
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