OMRF Ordinary Moment Frame Applicability Calculator

Evaluate applicability of ordinary moment frames based on Seismic Design Category. Determine height limits, R factor, and detailing requirements for OMRF systems per AISC 341.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Evaluate applicability of ordinary moment frames based on Seismic Design Category. Determine height limits, R factor, and detailing requirements for OMRF systems per AISC 341

Each component has a specific meaning:

  • Seismic Design Category — The seismic design category recorded for the scenario being assessed.

Note: Interpret the omrf applicability result against the thresholds and context described above.

How to Use

Enter the Seismic Design Category for the scenario you are assessing. Evaluate applicability of ordinary moment frames based on Seismic Design Category. Determine height limits, R factor, and detailing requirements for OMRF systems per AISC 341. Use the omrf applicability result to inform your calculation.

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Frequently Asked Questions