Butt-welded splice (CP / IP) calculator

Inputs in the worked example

The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.

Worked example — results

• ✓ Combined ≤ 1.0

Method, formulas and assumptions

• Plate yield stress fy (AS/NZS 3678) = CHOOSE(2,IF(20<=8,280,IF(20<=12,260,250)),IF(20<=8,320,IF(20<=12,310,IF(20<=20,300,280))),IF(20<=12,360,IF(20<=20,350,340))) = 300 MPa
• Plate tensile strength fu = CHOOSE(2,410,430,450) = 430 MPa
• φ for weld category = IF(1=1,0.9,0.6) = 0.9
• Tension capacity = IF(1=1,0.9*250*20*300/1000,IF(1=1,0.8,0.6)*0.6*490*12*250/1000) = 1350 kN
• Shear capacity = IF(1=1,0.9*0.6*300*250*20/1000,IF(1=1,0.8,0.6)*0.6*490*12*250/1000) = 810 kN
• Interaction √((N/φN)² + (V/φV)²) = SQRT((1100/1350)^2+(150/810)^2) = 0.83559
• Limit = 1 = 1

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