Moving a Wall? Here's Why Your Fire Protection Plan Just Broke
You budgeted for new flooring, new walls, and maybe HVAC. But did anyone account for the sprinkler heads that may need to move, the alarm devices affected by the new layout, or the permit review required for those changes?
When a floor plan changes, the fire protection systems serving that space need to be reviewed too. Moving a wall can affect sprinkler coverage. Adding a room can change smoke detector spacing. A revised corridor may affect pull station locations or notification coverage.
Property managers, commercial tenants, building owners, and general contractors sometimes find this out after demolition has already started, when someone finally asks, “What about the fire alarm?”
By then, fire protection work has to catch up with a construction schedule that’s already moving.
What Fire Protection Designers Actually Do
Our design team takes the building changes shown on the construction plans and determines what needs to change within the fire protection systems.
That can include fire alarm layouts, device placement, wiring pathways, sprinkler coordination, graphic maps, annunciator layouts, calculations, and permit documents.
The designer has to account for code requirements, existing system capacity, field conditions, and what the installation team will actually encounter on-site. A missed condition on the plans can mean a field question, a revision, or additional coordination once installation is underway.
Good drawings give the field team clear information to build from and give the local reviewer what they need to evaluate the proposed project work.
What Happens When You Move a Wall
Consider a typical tenant improvement project.
The tenant signs a lease, the build-out plans are approved, and demolition gets underway. The new layout puts a conference room where part of an open area used to be. Now the existing fire alarm and sprinkler layouts need to be checked against the new space.
It may look like one detector or sprinkler head needs to move. Once the layout changes, however, the designer needs to look at the surrounding system too.
A seemingly simple wall relocation can affect:
- Sprinkler coverage: New rooms, closets, storage areas, or enclosed spaces may require sprinkler heads to be added or relocated.
- Smoke detector placement: New walls, ceilings, rooms, or corridors can change spacing and detection coverage.
- Pull station locations: Revised exits or egress paths may affect where manual pull stations are required.
- Notification coverage: Changes to rooms and occupied areas can affect audible or visual notification requirements.
- Panel programming: Device addresses, descriptions, zones, or operating sequences may need to be updated.
- Permit review: Depending on the work and local requirements, fire alarm or sprinkler modifications may need to be reviewed by the Authority Having Jurisdiction before installation.
These changes are a normal part of modifying an occupied building but the comes when nobody accounts for them in the original tenant improvement scope and schedule.
File Type Matters
The drawings provided at the beginning of the project can affect how quickly the fire protection design gets underway. DWG files give designers editable geometry, dimensions, drawing layers, and other information they can work with directly.
PDF files may look nearly identical when you open it, but the underlying file is different. With a flattened PDF, the designer may need to trace walls, verify dimensions, clean up the background, or make field checks before working on the fire protection layout. That takes time…
Efficiency Advice: Before your next tenant improvement project starts, ask the architect or general contractor for the floor plans in DWG format when they’re available. If the plans were developed in AutoCAD or Revit, ask whether a DWG export can be provided.
Why In-House Design Helps During Construction
Tenant improvement plans don’t always match what the installer finds once the project begins. Existing piping may be routed differently than expected. A ceiling condition may not match the architectural drawings. Another trade may have equipment in the planned route. Construction changes can also happen after the fire protection drawings were prepared.
When the designer works directly with the project manager and field team, those questions can get back to the person who prepared the plans without adding another outside handoff.
The installer can explain what’s actually in the field, and the designer can review the condition and determine whether the plan needs to be revised. If an inspector requests a change, the same team already has the project information and can work through the response.
Since several trades may be working toward the same completion date, that level of communication is key to effective coordination.
What to Expect in a Tenant Improvement Project
Fire protection should come up early in the tenant improvement process, around the same time the team is discussing mechanical and electrical work.
The design schedule depends on the size of the project, the quality of the drawings provided, the condition of the existing systems, and how much the space is changing. Permit review also depends on the local jurisdiction and the scope being submitted.
Those timelines are worth discussing before the construction schedule is finalized. Installation may be relatively quick for a smaller modification, but design questions, missing information, permit comments, equipment availability, or coordination with other trades can affect when that installation can actually happen.
Fire protection also needs a place in the project budget. The amount will depend on the building, system type, occupancy, proposed layout, existing conditions, and local requirements.
If the floor plan is still being developed, that’s a good time to bring in the fire protection team. If construction documents are already finished, have the plans reviewed before demolition and installation get too far ahead.
Need Help Planning Fire Protection Scope for a Tenant Improvement Project?
If your team is planning a tenant improvement project, IFSS can review the proposed layout and help identify the fire alarm, sprinkler, design, and permitting work that may be affected.
Getting that review early gives the construction team time to account for the fire protection scope in the budget and schedule before crews are already working in the space.
