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Calculation Basis
Assumptions & Limits
- The page supports preliminary checks but does not replace full code compliance review.
- Allowable limits remain project-specific and must be checked separately.
- Elastic modulus, inertia, and loading inputs must match the real member.
Reference Basis
- Documentation: Methodology
- Documentation: Engineering Review
- Roark's Formulas for Stress and Strain
- Mechanics of Materials references
- Eurocode 3 steel reference
Validation Examples
These check cases show how key pages compare against known elastic beam benchmarks or symmetric reference cases.
Eurocode-style steel serviceability case
Case setup
L = 7.0 m, w = 6.5 kN/m, E = 210 GPa, I = 12000 cm^4
Validated metric
Maximum deflection
Reference
Reference result: 8.06 mm
Calculator
Calculator result: 8.06 mm
Check
Difference: 0.00%
Benchmark: closed-form simple-span UDL formula
Eurocode-Oriented Setup
| Material focus | Steel beams with E about 210 GPa |
| Typical check type | Serviceability deflection review |
| Common beam case | Simply supported beam under UDL |
| Typical follow-up | Compare output with project-specific SLS limit |
| Useful companion page | L/360 deflection limit calculator |
| Current preset | 7 m steel beam under 6.5 kN/m |
Engineering Notes
- This page is framed around Eurocode-style steel beam serviceability checks, but it intentionally keeps the calculator itself transparent and formula-based rather than pretending to replace clause-level project checking.
- For most steel beams the stiffness driver is section geometry, because the elastic modulus stays near 210 GPa across the common structural steel grades used in Eurocode practice.
- The correct allowable deflection still depends on the project brief, finishes, occupancy, vibration sensitivity, and national annex expectations, so use the output as a calculation engine and compare it against the governing SLS rule.
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