Sprinkler Hanger Spacing NFPA

Sprinkler pipe hanger spacing and seismic bracing per NFPA 13. Maximum spans for steel, copper and CPVC, plus the hanger count for any run of pipe.

WHAT IT CALCULATES
- Maximum hanger spacing by pipe material and size, 1 in through 8 in
- Steel: 12 ft on 1 in and 1-1/4 in, 15 ft on 1-1/2 in and larger
- Copper: 8 ft to 15 ft depending on pipe size
- CPVC: 6 ft to 10 ft, listed sizes 1 in through 3 in
- Hanger count and spacing for a given length of pipe
- Lateral and longitudinal seismic brace spacing where bracing is required

CODE REFERENCES BUILT IN
- NFPA 13 Table 17.4.2.1(a) - maximum distance between hangers
- NFPA 13 18.5.5.2.2 and 18.5.6.1 - brace spacing: lateral no more than 40 ft, longitudinal no more than 80 ft on center
- CPVC above 3 in is not in the table: the app says so instead of returning a number, and the manufacturer listing governs

HOW IT WORKS
Pick material, pipe size, run length and seismic zone. You get the maximum span, the number of hangers and the brace spacing to lay out.

CORE FEATURES
- Works 100 percent offline, no signal needed on site
- Calculation history you can reopen and reuse
- PDF export for submittals and field records
- Light and dark themes
- English and Spanish
- Material Design 3 interface

TYPICAL USES
- Checking a layout on site before the pipe goes up
- Verifying a contractor submittal during plan review
- Sizing during a bid walk without pulling the code book out of the truck
- Backing a field decision with a PDF you can attach to the job file
- Studying for NICET certification

WHAT THE PDF REPORT INCLUDES
- Every input you entered
- The calculated results with units
- Date and time of the calculation

OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Unlimited saved calculation history
- PDF export of results
- Dark theme
- Ad-free experience

WHO IT IS FOR
- Fire protection engineers and system designers
- Sprinkler fitters and installers
- Fire inspectors and AHJ plan reviewers
- Contractors preparing bids and submittals
- NICET candidates and fire protection students

ACCURACY NOTE
Results are a design aid, not a stamped design. Verify against the edition of the standard adopted in your jurisdiction and confirm with the authority having jurisdiction.

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