Fire Resistance Rating
Select construction classification and structural element to look up the IBC Table 601 hourly fire resistance rating, plus occupancy-specific code notes.
Use the Fire Resistance Rating
Parameters
Select parameters and click Calculate Rating
Required Rating
hours
0 hr
1 hr
2 hr
3 hr
4 hr
Occupancy
Construction
Element
Code Notes
Quick Reference — Structural Frame (IBC Table 601)
| Type | Frame | Ext. BW | Int. BW | Floor | Roof |
|---|
BW = Bearing Wall. Values in hours. Source: IBC 2021 Table 601.
Summary
Select construction classification and structural element to look up the IBC Table 601 hourly fire resistance rating, plus occupancy-specific code notes.
How it works
- Select the building occupancy type (e.g. Assembly, Business, Residential).
- Choose the construction type classification (Type I through Type V).
- Pick the structural element you need the rating for (columns, beams, floors, walls, etc.).
- Click "Calculate Rating" to get the required fire resistance rating in hours.
- Review the code reference and notes for your specific combination.
Use cases
- Verify fire resistance requirements during the schematic design phase.
- Cross-check contractor submittals against code-mandated hourly ratings.
- Quickly compare ratings across different construction type options.
- Support code compliance documentation for permit applications.
- Educate students and junior engineers on IBC fire resistance tables.
- Estimate upgrade costs when changing occupancy or construction type.
Frequently Asked Questions
Last updated: 2026-09-20 ·
Reviewed by Nham Vu