Firestop Joint Calculator
Calculate sealant volume, width-to-depth ratio, and backer rod sizing for fire-rated joint systems.
Inputs
%
Results
Width-to-depth ratio
2
Total sealant (fl oz)66.5
Cartridges needed7
Backer rod diameter (in)1.25
Min sealant class12
Material cost ($)$87
How to Use This Calculator
- Enter Joint width (in), Joint depth (in), and Joint length (ft).
- Set Fire rating (hrs) and Expected movement (%).
- Review the Width-to-depth ratio result.
- Use Total sealant (fl oz) and Cartridges needed to inform your decision.
Ad Placeholder
Ad Placeholder