Impact Load Factor Calculator
Dynamic amplification when a weight drops onto a structure from height h.
Even h = 0 (suddenly applied load) gives factor 2! A 100 mm drop onto a stiff member can multiply stress 10ร. Stiff structures suffer impact most โ flexibility is armour.
Formula
Impact Load Factor Calculator is a free impact factor for structural engineers, fabricators and site engineers โ 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 Impact Load Factor Calculator
Dynamic amplification when a weight drops onto a structure from height h. The calculation implements n = 1 + โ(1 + 2h/ฮด_st) (Timoshenko, Strength of Materials โ impact loading). Even h = 0 (suddenly applied load) gives factor 2! A 100 mm drop onto a stiff member can multiply stress 10ร. Stiff structures suffer impact most โ flexibility is armour.
How to use Impact Load Factor Calculator
- 1Enter Drop height in mm.
- 2Enter Static deflection under the load in mm.
- 3Read Impact factor instantly โ no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Impact Load Factor Calculator?
- โImplements the standard formula โ n = 1 + โ(1 + 2h/ฮด_st)
- โReference cited on-page: Timoshenko, Strength of Materials โ impact loading
- โOne-click SI โ Imperial toggle โ values convert in place, physics stays in SI
- โLive worked example: the substitution recomputes from your numbers
- โRuns entirely in your browser โ nothing uploaded, free forever
Frequently asked questions
What formula does the Impact Load Factor Calculator use?+
It computes n = 1 + โ(1 + 2h/ฮด_st), per Timoshenko, Strength of Materials โ impact loading. 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?+
Even h = 0 (suddenly applied load) gives factor 2! A 100 mm drop onto a stiff member can multiply stress 10ร. Stiff structures suffer impact most โ flexibility is armour.
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 Impact Load Factor Calculator free to use?+
Yes โ 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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