Addressable fire alarm design coordinated to NFPA 72.
Device layouts, risers, and the supporting calculations, documented well enough to permit, install, and pass inspection without a redesign.
Fire alarm is the system the authority having jurisdiction looks at hardest, and the one where an incomplete submittal costs the most schedule. Missing battery calculations, notification coverage that was estimated rather than calculated, or a riser that does not match the device count are all routine causes of a rejected permit set.
We design addressable systems to NFPA 72: initiating device placement, notification appliance coverage calculated for the required audibility and visibility, circuit layout, and the riser diagram that ties it together. Battery and voltage-drop calculations are delivered with the set rather than left for the installing contractor to produce later.
The fire alarm design is coordinated against the architectural and mechanical models along with the rest of the electrical scope, so device locations account for the ceiling conditions, duct detectors land where the ductwork actually runs, and the interfaces to sprinkler and mechanical systems are shown.
What it covers
- Addressable system design
- Initiating and notification device layouts
- Riser diagrams and circuit design
- NFPA 72 coordination
- Battery and voltage-drop calculations
- Interfaces to mechanical and sprinkler systems
Sealed fire alarm drawings
Device plans, riser diagram, and details, stamped by a PE licensed in the project's state.
Battery calculations
Standby and alarm load calculations sized for the required duration.
Voltage-drop calculations
Notification circuits verified so devices operate at their rated voltage at the end of the run.
Device schedule
Every initiating and notification device identified with its address and function.
Sectors served
Fire Alarm sealed by a professional engineer, in 22 states.
See where we are licensedFire Alarm: common questions.
What does a fire alarm design include?
An addressable fire alarm design includes initiating and notification device layouts, circuit design, a riser diagram, interfaces to mechanical and sprinkler systems, and the supporting battery and voltage-drop calculations, all coordinated to NFPA 72 and sealed by a licensed professional engineer.
Do you provide battery and voltage-drop calculations?
Yes. Both are delivered with the drawing set rather than deferred to the installing contractor. Battery calculations size standby and alarm load for the required duration, and voltage-drop calculations confirm notification devices still operate at rated voltage at the end of each circuit.
What is an addressable fire alarm system?
An addressable system identifies each device individually, so the panel reports the specific device in alarm rather than only the zone. That makes locating an event faster and makes maintenance and troubleshooting far more direct than on a conventional zoned system.
Will the design pass review by the authority having jurisdiction?
Sets are prepared to NFPA 72 with the calculations and documentation reviewers expect to see. The most common causes of rejection, missing calculations and a riser that does not reconcile with the device count, are addressed before the set is issued.
Need fire alarm on a project?
Share the project type, location, and timeline. A licensed engineer reviews every inquiry and responds directly.