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Smoke Detector Spacing on Level Ceilings with Beams and Joists

Recommendations

Based on these findings, the report authors proposed language for addition to the body and annex of NFPA 72.
The language clarifies how smoke detectors shall be placed on ceilings with beams and joists. These changes
are expected to be incorporated into the 2007 edition of NFPA 72, which will be released in late 2006, to quell
some of the debate surrounding the current requirements for smoke detectors on beam ceilings.

Conclusion

As a part of the National Fire Protection Association’s mission to “reduce the worldwide burden of fire” by
continually updating their consensus codes based on the latest research available, NFPA commissioned this study
of smoke detector spacing. The results of this study and accompanying code changes are expected to reduce the
overall cost of fire protection systems in beam ceiling applications while not comprising occupant safety.

Acknowledgement

This document was written with guidance from Schirmer Engineering Corporation.

A05-0408-000 • 9/06 • #1703

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