Lifting Lug Check

15

Lift

Job ref Weight lifted kg Lugs sharing the load Dynamic / impact factor 1.5 – 2.0 typical Sling angle from vertical ° Side pull is

Lug plate

Thickness t mm Width at the hole W mm Hole diameter mm Shackle pin diameter mm Hole centre to top edge R mm Hole centre above the weld h mm Base length (weld length) mm Fillet weld leg mm, both sides Plate yield strength Fy MPa Weld allowable stress MPa (0.3 × 482 = 145 for E70 / E7018)

Allowables follow AISC ASD practice for pin-connected plates: tension 0.45 Fy on the net section, bearing 0.9 Fy, shear 0.4 Fy. Local stresses in the shell under the lug (WRC 107 / 537) are not checked.