| 熔接設計 | 填角熔接的慣性力矩 J [mm 4 、in 4 ] | 熔接群組剖面的重心位置 | 
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 | J = π a (r + a / 2) 3 | - | 
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所用變數的含義:
| a | 填角熔接高度 [mm, in] | 
| B | 熔接群組寬度 [mm, in] | 
| H | 熔接群組高度 [mm, in] | 
| L | 熔接長度 [mm, in] | 
| r | 熔接半徑 [mm, in] | 
| s | 腹板厚度 [mm, in] | 
| t | 凸緣厚度 [mm, in] |