Steel · Connections: bolts & welds
Block shear rupture calculator
Block shear with the AS 4100 rupture/yield shear plane options and kbs for non-uniform tension.
Standard: AS 4100 Cl 9.1.9
Inputs in the worked example
The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.
| Input | Value | Unit |
|---|---|---|
| Gross shear area | 2400 | mm² |
| Net shear area | 1700 | mm² |
| Net tension area | 500 | mm² |
| fy | 300 | MPa |
| fu | 430 | MPa |
| kbs | 1.0 uniform tension | |
| Design force | 300 | kN |
Worked example — results
| Result | Value | Unit |
|---|---|---|
| 0.6 fu Anv + kbs fu Ant | 653.6 | kN |
| 0.6 fy Agv + kbs fu Ant | 647.0 | kN |
| φRbs = 0.75 min | 485.3 | kN |
- ✓ N* ≤ φRbs
Method, formulas and assumptions
- 0.6 fu Anv + kbs fu Ant = (0.6*430*1700+1*430*500)/1000 = 653.6 kN
- 0.6 fy Agv + kbs fu Ant = (0.6*300*2400+1*430*500)/1000 = 647 kN
- φRbs = 0.75 min = 0.75*MIN(653.6,647) = 485.25 kN
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.