Fire Resistance Rating Calculator

Estimate fire resistance ratings based on wall type, thickness, insulation, and assembly layers.

Select the primary wall construction material.
Total wall thickness including all layers. For gypsum, enter total assembly depth.
mm
Type of insulation in the assembly cavity, if any.
Number of gypsum board layers per side (for gypsum assemblies). Use 1 for concrete/CMU.

Results

Estimated Fire Rating-hours
Assembly Description-
Applicable Code Section-
References: IBC Chapter 7 — Fire and Smoke Protection, UL Fire Resistance Directory.