Code analysis tool — not a code compliance determination.
This analysis is based on the 2024 International Building Code (IBC 2024) and IECC 2021.
Local jurisdictions may have adopted different editions or local amendments. Verify all
findings with your authority having jurisdiction (AHJ) and a licensed architect or
building official before using these results for design or permitting decisions.
Project
Code Baseline
Enter your project parameters and this tool generates the IBC 2024 baseline — viable construction types,
fire-resistance ratings, sprinkler requirements, egress, fire separation, insulation minimums, and the
cost and insurance implications of changing construction type.
Project parameters
Construction type options — IBC 2024 Tables 504.3, 504.4, 506.2
Types shown in green are permitted for this occupancy, story count, and floor area.
Red types exceed the allowable limits. Select any viable type below the table for its full baseline requirements.
Type
Description
Status
Max stories
Max height
Max area / floor
Baseline requirements by construction type
Select a viable construction type to see its full baseline: fire-resistance ratings, required assemblies, and code references.
Egress and occupant load — IBC 2024 Chapter 10
Occupant load and exits
Occupant load calculated from IBC 2024 Table 1004.5. Exit count per §1006.3. All exits must be accessible and properly distributed. Verify against actual floor plan.
Travel distance and common path
Travel distance per Table 1017.1 measured from most remote point to nearest exit. Sprinklered buildings receive increased limits.
Fire separation and rated construction — IBC 2024 Chapter 7
Required fire-rated assemblies for this occupancy
Requirements shown are for the primary occupancy selected. Mixed-occupancy projects require additional separation analysis per IBC §508.
Mixed-occupancy analysis — IBC 2024 §508
Three paths under IBC §508 — choose based on secondary occupancy size and construction strategy
Sprinkler systems — NFPA 13 / 13R / 13D cost and area impact
Cost estimates based on the Arch Datum Cost Benchmark 2025–2026 national average. Apply regional multiplier for your location.
Cost benchmark synthesized from published industry references including RSMeans Building Construction Cost Data 2025–2026 (Gordian), with regional adjustment.
Estimate confidence: ±20%.
Minimum insulation requirements — IECC 2021
Thermal envelope minimums
What this means by construction type
Cost premium and insurance impact by construction type
Percentages show estimated total project cost premium relative to Type V-B baseline.
Insurance rate index shows relative fire insurance premium (1.00 = highest rate).
Upgrading construction type can offset its cost premium through long-term insurance savings.
Type
Structural system
Cost premium vs. V-B
Cost premium on $— project
ISO fire class
Insurance rate index
Cost estimates: 2025–2026 benchmark structural system data; WoodWorks 2024 Cost Comparison Studies.
Confidence: ~55% — ranges are wide. Use as order-of-magnitude only.
Insurance class: ISO Commercial Lines Manual.
Sources: WoodWorks |
ISO/Verisk
Exterior wall fire resistance by separation distance — IRC 2024 Table R302.1
Requirements are based on the fire separation distance — measured from the exterior wall of the building
to the centerline of the street, an imaginary lot line, or the face of an adjacent building.
Enter the distance in the inputs panel above to highlight the applicable row.
Reminder: This analysis is based on IBC 2024 and IECC 2021. Local jurisdictions may have adopted
different code editions or local amendments. All findings require verification by a licensed architect or building
official. This tool does not constitute a code compliance determination.