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AI drafting for sprinkler layouts

AI Fire Sprinkler Layout Drafting

Sprinkler layout is a spacing puzzle repeated room by room: every head has to meet the NFPA 13 limits for the hazard, clear the lights and diffusers on the ceiling plan, and stay out of the shadow of ducts and beams. Nomic drafts the head layout, branch lines, and mains in CAD from the RCP and the hazard classification, checks the spacing and obstruction rules, and hands your sprinkler designer a DWG ready for hydraulic calculation and sign-off.

Start for freeAll drafting work
Last reviewed: November 2026

You send

  • Reflected ceiling plans and architectural backgrounds
  • The hazard classification for each area, set by your designer
  • Mechanical ductwork plans with duct sizes
  • Fire flow test data and the riser location
  • Your fire protection CAD standards and past sprinkler sheets

Nomic hands back

  • Sprinkler layout plans as DWG files on your layers
  • Branch lines and mains routed and ready for hydraulic sizing
  • Head counts by type in Excel
  • Clouded PDFs and an open items list for the sprinkler designer
1234567ABCNURSE STATION201EXAM202EXAM203EXAM204EXAM205EXAM206EXAM207EXAM208EXAM209PATIENT ROOM210PATIENT ROOM211PATIENT ROOM212PATIENT ROOM213PATIENT214PATIENT215STAIRS24" CROSS MAIN12'-0" MAXR27'-3"27'-0"27'-3"27'-3"27'-0"27'-3"94'-8"1AFIRE SPRINKLER PLANSCALE: 1/8" = 1'-0"N1234CONSULTING ENGINEERSREVISIONS1ISSUED FOR REVIEWPROJECTNORTHGATE MEDICALSCALE1/8" = 1'-0"DATE02/10/2026KEY PLANSHEET TITLEFIRE SPRINKLERPLANSHEET NUMBERFP-101

On the sheet

Fire Sprinkler Plan, annotated

A fire sprinkler plan with the main, branch lines, and heads spaced to the hazard classification.

  1. 1Sprinkler head at listed spacing
  2. 2Branch line feeding the heads
  3. 3Cross main in the corridor
  4. 4Riser to the floor control valve

The problem

Every ceiling change moves the heads

A sprinkler layout sits on top of a ceiling that keeps changing. The architect revises the RCP, the lighting moves to a new grid, the mechanical engineer adds a linear diffuser, and heads that were centered in tile are now 6 inches from a pendant fixture or under a 4 foot wide duct. The designer moves them one at a time, rechecks spacing to the walls and to each other, and reroutes the armovers.

The rest is counting and measuring. Light hazard offices allow up to 225 square feet per head and ordinary hazard storage rooms 130, and most floors have both, so the spacing changes at every door. Hydraulic calculations, remote area selection, and the final sign-off belong to the sprinkler designer, and that work waits until the head layout settles.

01 / Layout

Heads laid out by hazard and by ceiling

Attach the RCP, the architectural plans, and the hazard classification your designer set for each area. Nomic places heads within the protection area and spacing limits for each hazard, centers them in tile where the ceiling allows, and routes branch lines and mains back to the riser on your layers and blocks.

  • Pendent, upright, and sidewall heads chosen by ceiling type
  • Spacing to walls and between heads held to the hazard limits
  • Branch lines, armovers, and mains drawn back to the floor control valve
02 / Coordination

Drawn around the ceiling and the ductwork

Nomic reads the RCP for lights, diffusers, speakers, and soffits, and reads the mechanical plans for duct widths and elevations, so heads land where the ceiling and the ductwork leave room. The hazard plan and fire flow test go to your designer with the layout, because the hydraulic calculation is theirs to run.

  • Heads kept clear of light fixtures and diffusers on the RCP
  • Heads added below ducts and soffits wide enough to block discharge
  • Layout drawn to your fire protection CAD standards and past sheets
03 / Check

Spacing and obstructions checked before the calc

Nomic checks its layout against the NFPA 13 edition you name, the RCP, and the mechanical plans. Each drawn change is clouded, and the findings list what Nomic fixed and what the sprinkler designer has to decide, starting with the hydraulic calculation and remote area.

  • Protection area and maximum spacing checked for every head
  • Obstruction rules checked against lights, beams, and ducts
  • Open items listed for the sprinkler designer of record

Checked against

The code and documents behind every sheet

Name the editions the project is designed to and Nomic checks its own drawing against them before handing it back. Your engineer or architect of record makes the final call and stamps the set.

  • NFPA 13 Standard for the Installation of Sprinkler Systems
  • NFPA 13 Chapter 4 occupancy hazard classification
  • IBC Chapter 9 fire protection and life safety systems
  • Local fire marshal amendments
  • Project specifications Section 21 13 13

How it works

From a sentence to a stamped set

  1. Step 1

    Ask for the drawing

    Say what the sheet needs to show and attach the backgrounds, markups, cutsheets, or photos. A sentence is enough to start.

  2. Step 2

    Nomic drafts it in CAD

    Nomic works in CAD on its own computer, on your layers and blocks, following how your firm drew the same thing before. It saves real DWG files to the project.

  3. Step 3

    Nomic checks its own work

    The drawing is checked against the code editions you name and the source documents. Everything Nomic drew is clouded, and open questions are listed.

  4. Step 4

    Your team reviews and stamps

    Your engineers and architects review the clouded changes, make the final call, and issue the set under their own stamp.

FAQ

Frequently asked questions

Yes. Nomic works in CAD on its own computer and saves sprinkler layouts as DWG files, with heads, branch lines, armovers, and mains on your layers. It spaces heads to the NFPA 13 limits for the hazard your designer sets, coordinates with the RCP and the ductwork, and checks its own layout before your designer reviews it.

No. Hydraulic calculations, remote area selection, final pipe sizing, and the signed submittal stay with your sprinkler designer. Nomic lays out the heads and routes the piping, then draws the pipe sizes onto the plan once the designer returns them from the calculation.

Your sprinkler designer or fire protection engineer. Nomic reads the hazard classification plan they provide and applies the protection area and spacing limits for each hazard, so a light hazard office and an ordinary hazard storage room on the same floor are each laid out to their own limits.

Yes. Nomic checks each head against the obstructions on the RCP and the mechanical plans, including the three times rule for columns and pipes and the requirement for heads below ducts and soffits more than 4 feet wide. Anything it cannot resolve by moving a head goes on the open items list.

No. Nomic works in CAD on its own computer and saves DWG files to your project, which open in AutoCAD or any DWG editor. Teams that model sprinklers in Revit get DWGs and a change list their modeler links into the model.

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