Calculate moment of inertia (Ix, Iy) for common weld group patterns used in structural connections per AISC Steel Construction Manual
Input Parameters
Results
--
Ix (about x-axis)
in³
--
Iy (about y-axis)
in³
--
Sx (section modulus x)
in²
--
Total Weld Length
in
Note: Weld group properties are calculated treating welds as lines (unit width). Multiply by throat size (0.707w) for actual stress calculations per AISC.
Reference
AISC Steel Construction Manual, Table 8-8: Weld Group Properties
Rectangle: Ix = d^2(3b+d)/6, Iy = b^2(3d+b)/6
Two Lines: Ix = bd^2/2
C-Shape: Ix = d^2(3b+d)/6
Line weld properties treated as unit-width lines