Groove Welds: This post provides the requirements for the design of
connectors (Groove welds) and connecting elements such as plates, stiffeners,
gussets, angles, brackets, etc. The requirements for groove welds are stated
here following AWS : D 1.1 : Structural Welding Code-Steel.
Effective area
Effective area of groove welds shall be considered as the
effective length of the welds times the effective throat thickness.
The effective length of groove weld shall be the width of
the part joined.
The effective throat thickness of a complete penetration
groove weld shall be thickness of the thinner part joined.
The effective throat thickness of a partial-penetration
groove weld shall be as shown in Table-1.
Table-1: Effective throat thickness of a
partial-penetration groove welds.
The effective throat thickness of a flare groove welds when flush to the surface of bar or 900 bend in a formed section shall be as shown in Table-2. Random sections of a production weld for each welding procedure, or such test sections as may be required by design documents, shall be used to verify that the effective throat is consistently obtained.`
Table-2: Effective throat thickness of a Flare groove welds.
Type of
Weld
|
Radius (R)
of Bar or Bend
|
Effective
throat Thickness
|
Flare
Bevel Groove
|
All
|
5/16 R
|
Flare V-
Groove
|
All
|
½ R*
|
Use 3/8
for Gas Metal Arc Welding (except short circuiting transfer process when
R≥12mm.
|
||
Limitations
The minimum effective throat thickness of a partial
penetration groove weld shall be as shown in Table-3. Minimum effective throat
thickness is determined by the thicker of the two parts joined, except that the
weld size need not exceed the thickness of the thinnest part joined though a
large size is required by calculation. For this exception, particular care
shall be taken to provide sufficient pre-heat foe soundness of the weld.
Table-3: Minimum effective throat thickness of a
partial-penetration groove welds.
Material
Thickness of Thicker part joined, mm
|
Minimum Effective Throat Thickness,mm
|
To 6 Inclusive
|
3
|
Over 6 to 12
|
5
|
Over 12 to 20
|
6
|
Over 20 to 40
|
8
|
Over 40 to 60
|
10
|
Over 60 to 150
|
12
|
Over 150
|
16
|
