Fillet Weld Moment of Inertia Equations

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The following are equations to define the Fillet Weld Moment of Inertia Equations for various weld configurations.

Weld

Moment of Inertia

Fillet "I" Weld [mm4, in4]

Linear Weld

Parallel Weld

 

Weld

Moment of Inertia
Location Center of Gravity

Linear Weld

Parallel Weld

-

 

Where:

I

= Moment of inertia [mm4, in4]

= Center of Gravity Location [mm, in]

a

= Height fillet weld [mm, in]

B

= Width of weld [mm, in]
s = Web thickness [mm, in]
L = Length of weld [mm, in] 
r = Weld radius [mm, in]
t = Flange thickness [mm, in]
H = Height of fillet weld group [mm, in]