Fire Sprinkler Distribution LISP for AutoCAD: Free Download

Download free fire sprinkler distribution LISP for AutoCAD. Automate sprinkler and light layout with the barray autolisp tool. Speed up fire protectio

Heya! Welcome to Crypto To You. Today on this occasion I am going to share Fire Sprinkler Distribution LISP for AutoCAD: Free Download.

Designing fire sprinkler layouts is one of the most repetitive tasks in MEP drafting. A single floor can have 100+ sprinkler heads, each requiring precise placement to meet NFPA 13 spacing requirements. Doing this manually—one head at a time—is slow, error-prone, and mind-numbing.

This is exactly the problem that AutoLISP routines for sprinkler distribution solve. With a single command, you can:

Distribute sprinkler heads across an entire room or floor
Meet code spacing requirements automatically
Distribute lighting fixtures in the same pattern
Edit and adjust hundreds of heads in seconds

The barray LISP routine is one of the most popular tools for this task—it automates distribution of blocks (sprinklers, lights, diffusers) across regular and irregular spaces. In this guide, you'll learn what the tool does, how to install and use it, and where to download it free. We'll also connect you with fire protection and AutoCAD courses that will sharpen your skills.

What Is the Sprinkler Distribution LISP?

The sprinkler distribution LISP is an AutoLISP routine that automates the placement of sprinkler heads (and other blocks) across a defined area. Instead of manually drawing each sprinkler, you:

Define the area (rectangular or irregular)
Specify spacing
Specify the block to insert
Run the LISP routine
All sprinklers are placed automatically

This saves hours of drafting time per floor—and ensures consistency in spacing and layout.

The "barray" LISP Routine

The barray routine (Block ARRAY) is a popular AutoLISP tool that:

Distributes blocks in a rectangular or polar array
Works with any block—sprinklers, lights, diffusers, columns, furniture
Handles regular and irregular spaces
Allows custom spacing in X and Y directions
Supports rotation and alignment

🎯 Master Fire Protection Design and AutoCAD Drafting

Fire sprinkler design requires both technical knowledge and strong CAD skills. These courses will help you on both fronts.

🔥 Fire Sprinkler Systems Training Course

This course teaches you the design of fire sprinkler systems—including hydraulic calculations, pipe sizing, and layout principles—essential for anyone using sprinkler LISP tools.

👉 Enroll Now – Fire Sprinkler Systems Training Course

Download Your Free Sprinkler Distribution LISP

Get instant access to the LISP routine and a block library for sprinklers and lights:

📥 Download Free Fire Sprinklers Distribution LISP for AutoCAD

What's Inside:

✅ barray.lsp — the block array routine
✅ Sprinkler head blocks (various types)
✅ Lighting fixture blocks
✅ Installation instructions
✅ Sample DWG for testing

How to Install and Use the LISP Routine

Step 1: Load the LISP File

Method A — Manual Load:

In AutoCAD, type APPLOAD
Browse to barray.lsp
Click "Load"

Method B — Auto-Load:

Open AutoCAD
Type APPLOAD → "Startup Suite" → "Add"
Select the LISP file → it will load on every AutoCAD session

Step 2: Run the Command

Type the command name (typically BARRAY or BA) at the command line.

Step 3: Follow the Prompts

The routine will ask:

Select object: Choose the sprinkler block to distribute
Specify corner 1: First corner of the rectangular area
Specify corner 2: Opposite corner
Enter spacing X: Horizontal spacing (e.g., 12 feet)
Enter spacing Y: Vertical spacing (e.g., 12 feet)

The blocks will be distributed automatically across the area.

Step 4: Verify Layout

Check the distribution against NFPA 13 requirements:

Maximum spacing: 15 ft (light hazard), 12 ft (ordinary hazard)
Maximum coverage area per head: 225 ft² (light), 130 ft² (ordinary)
Minimum distance from walls: 4 inches
Maximum distance from walls: half the spacing

🔥 The Complete Fire Fighting with AutoCAD, Elite, Excel & NFPA

This comprehensive course covers fire protection design from fundamentals to advanced calculations—including sprinkler layout, hydraulic analysis, and AutoCAD drafting.

👉 Enroll Now – Complete Fire Fighting with AutoCAD, Elite, Excel & NFPA

NFPA 13 Sprinkler Spacing Rules

The LISP routine places blocks—but the spacing must comply with NFPA 13. Here are the key rules:

Hazard Class	Max Spacing	Max Coverage
Light Hazard	15 ft (4.6 m)	225 ft² (20.9 m²)
Ordinary Hazard	12 ft (3.7 m)	130 ft² (12.1 m²)
Extra Hazard	12 ft (3.7 m)	100 ft² (9.3 m²)

Additional Rules

Minimum distance from walls: 4 inches
Maximum distance from walls: Half the maximum spacing
Sprinklers must be perpendicular to the ceiling or angled per manufacturer instructions
Obstructions: Sprinklers must be positioned to avoid obstruction by beams, ducts, etc.

Common Sprinkler Distribution LISP Mistakes

❌ Mistake #1: Using Wrong Spacing

Fix: Always verify the spacing against the hazard classification. The LISP routine will place blocks at whatever spacing you enter—so enter the correct value.

❌ Mistake #2: Not Considering Obstructions

Fix: Sprinklers must be positioned to cover obstructions (beams, ducts, columns). Review the layout after LISP distribution and adjust manually.

❌ Mistake #3: Overlooking Ceiling Types

Fix: Different ceiling types (exposed, concealed, suspended) affect sprinkler placement. Adjust the block library accordingly.

❌ Mistake #4: Ignoring Slope

Fix: On sloped ceilings, sprinklers must be perpendicular to the slope. The LISP routine distributes on a flat plane—manual adjustment is needed.

❌ Mistake #5: Not Checking Clearances

Fix: Check that all sprinklers have proper clearance from walls, columns, and obstructions per NFPA 13.

🔥 Firefighting Systems Design Course by Ramy Ghoraba

A complete firefighting design course covering sprinkler systems, hydraulic calculations, and standards compliance.

👉 Enroll Now – Firefighting Systems Design Course

Beyond Sprinklers: Other Uses for the LISP Routine

The barray routine isn't just for sprinklers—it works with any block. Common uses in MEP drafting:

Application	Use
Lighting fixtures	Distribute lights across ceiling grid
Air diffusers	Distribute HVAC diffusers
Smoke detectors	Distribute fire alarm devices
Columns	Place structural columns at regular spacing
Furniture	Place desks, chairs, or workstations
Landscape plants	Distribute trees or shrubs
Parking spaces	Place parking lines

AutoLISP Basics: Understanding the Routine

If you want to modify or create your own LISP routines, here's the basic structure of a block distribution LISP:

(defun c:BARRAY ( / blk pt1 pt2 spcX spcY )
  (setq blk (car (entsel "\nSelect block to array: ")))
  (setq pt1 (getpoint "\nFirst corner: "))
  (setq pt2 (getcorner pt1 "\nOpposite corner: "))
  (setq spcX (getreal "\nX spacing: "))
  (setq spcY (getreal "\nY spacing: "))
  ;; Loop to insert blocks
  (setq x (car pt1))
  (while (< x (car pt2))
    (setq y (cadr pt1))
    (while (< y (cadr pt2))
      (command "_.insert" blk (list x y) 1 1 0)
      (setq y (+ y spcY))
    )
    (setq x (+ x spcX))
  )
  (princ)
)

This is a simplified version—real routines include rotation, alignment, and irregular boundary handling.

🔥 Firefighting Systems Checklists & AutoCAD Details

Learn fire protection design details, checklists, and AutoCAD drafting standards for sprinkler systems.

👉 Enroll Now – Firefighting Design with AutoCAD

FAQ

Q1: What is AutoLISP?

A: AutoLISP is a programming language embedded in AutoCAD. LISP routines automate repetitive tasks like block distribution, layer management, and drawing creation.

Q2: Is the LISP routine compatible with all AutoCAD versions?

A: Yes—LISP routines work on AutoCAD 2010 and later. They also work on AutoCAD LT (with limitations) and BricsCAD.

Q3: Can I modify the LISP routine?

A: Yes—the LISP file is plain text. You can open it in a text editor and modify spacing, block names, or add features.

Q4: What if the LISP doesn't work?

A: Check that: (1) The file loaded successfully via APPLOAD, (2) The command name matches (usually BARRAY or BA), (3) The block exists in the drawing.

Q5: Can I distribute sprinklers on non-rectangular areas?

A: The basic barray routine handles rectangular areas. For irregular spaces, more advanced routines (or manual adjustment) are needed.

Conclusion

The sprinkler distribution LISP routine is one of the highest-value productivity tools a fire protection designer can have. It turns hours of repetitive drafting into seconds of automation—while ensuring consistent spacing and layout.

Download the free LISP routine, follow the installation steps in this guide, and pair it with structured fire protection and AutoCAD training to become an expert fire protection designer.

📥 Download Free Sprinkler Distribution LISP

🚀 Recommended Courses for Fire Protection Designers

Course	Focus	Enroll
Fire Sprinkler Systems Training Course	Sprinkler design fundamentals	👉 Enroll
Complete Fire Fighting with AutoCAD, Elite, Excel & NFPA	Full fire protection workflow	👉 Enroll
Firefighting Systems Design Course by Ramy Ghoraba	Firefighting design + calcs	👉 Enroll
Fire Fighting Drafting with AutoCAD	Fire fighting AutoCAD drafting	👉 Enroll
Firefighting BOQ and Estimation	BOQ and cost estimation	👉 Enroll

Disclosure: This article contains affiliate links. If you purchase a course through these links, we may earn a commission at no additional cost to you.

Getting Info...

About the Author

Welcome to our platform, where we provide expert insights on SCADA systems, PLC programming, and industrial automation. Explore valuable resources, courses, and case studies to enhance your skills and stay ahead in the field.