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Calculation Basis
Assumptions & Limits
- Preset values speed up the setup but do not replace final section or material verification.
- The page is designed for fast deflection and reaction checks.
- Local code rules, long-term effects, and connection details still need separate review.
Reference Basis
- Documentation: Methodology
- Documentation: Engineering Review
- Roark's Formulas for Stress and Strain
- Mechanics of Materials references
S-Shape Reference Setup
| Profile family | American S-shape steel section |
| Elastic modulus E | 210 GPa |
| Preset stiffness basis | 3600 cm^4 |
| Profile intent | Historic American beam family |
| Preset support case | Simply supported beam |
| Preset loading | Uniform load |
| Use case | Preliminary S-shape check |
Engineering Notes
- Use this page when the S-shape series is known but the exact section size still needs to be selected.
- The preset stiffness is only a starting point and should be replaced with real section data once the member is fixed.
- If the exact American section is already selected, replace the default stiffness with the actual section property rather than using the preset as-is.
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