Bolt Bearing Capacity Calculator
Plate bearing strength at a bolt hole — often governs over bolt shear.
Thin plates fail by hole elongation long before good bolts shear. Generous edge distance (≥1.5d₀) and pitch (≥2.5d) push k_b — and capacity — up for free.
Formula
Bolt Bearing Capacity Calculator is a free bolt bearing for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Bolt Bearing Capacity Calculator
Plate bearing strength at a bolt hole — often governs over bolt shear. The calculation implements V_dpb = 2.5·k_b·d·t·f_u / 1.25 (IS 800:2007 cl. 10.3.4). Thin plates fail by hole elongation long before good bolts shear. Generous edge distance (≥1.5d₀) and pitch (≥2.5d) push k_b — and capacity — up for free.
How to use Bolt Bearing Capacity Calculator
- 1Enter Bolt diameter in mm.
- 2Enter Thinner plate thickness in mm.
- 3Enter Plate ultimate f_u in MPa.
- 4Enter k_b (edge/pitch factor) (= min(e/3d₀, p/3d₀−0.25, f_ub/f_u, 1). Typical 0.4–0.6).
- 5Read Design bearing capacity instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Bolt Bearing Capacity Calculator?
- ✓Implements the standard formula — V_dpb = 2.5·k_b·d·t·f_u / 1.25
- ✓Reference cited on-page: IS 800:2007 cl. 10.3.4
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Bolt Bearing Capacity Calculator use?+
It computes V_dpb = 2.5·k_b·d·t·f_u / 1.25, per IS 800:2007 cl. 10.3.4. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Thin plates fail by hole elongation long before good bolts shear. Generous edge distance (≥1.5d₀) and pitch (≥2.5d) push k_b — and capacity — up for free.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Bolt Bearing Capacity Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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