Fire Sprinkler Design, Built for Contractors
Our founder has been an installer, a foreman running crews, and now a designer. He knows where drawings fall apart in the field, and makes sure yours do not.
What We Design
Not a generalist engineering firm. Every service here exists because contractors needed it. Drawings, calcs, head modifications, pump rooms. Nothing else.
Fire Sprinkler Drawings
Shop drawings for new builds, remodels, and underground systems. Stamped and ready to submit.
Hydraulic Calculations
NFPA 13, 13R, and 13D hydraulic calculations. Stamped and ready to drop into your permit package.
Add or Relocate Heads
Moving or adding heads on an existing system. Starting at $500 for up to 50 heads, then $2 each beyond that.
Pump Room Design
Equipment layout and connection detail drawings for commercial and industrial fire pump rooms.
How It Works
The whole process runs online. No back-and-forth calls, no in-person meetings required.
Submit Plans
Upload your project plans through our online form. No calls needed to get started.
Review
We review your plans, confirm the scope, and provide a quote before anything starts.
Design
We produce the drawings and calculations in-house. One designer on your project, start to finish.
Delivery
Stamped documents delivered as digital files. Hand them to the plan reviewer as-is.
Revisions
If the AHJ requests changes, we handle them. No extra charge.
Why Contractors Choose 4I Design
Fire sprinkler design is the whole business here. Not a department inside a generalist firm routing your job to whoever has bandwidth that week. We confirm pricing before we touch a file, and the entire process runs online, so you never have to call to get started.
- Residential and commercial, one firm for both
- Revisions included, no extra charge
- Background across four Houston fire protection firms
“Contractors deserve design work that is accurate, affordable, and delivered without delays. That is what we build every project around.”
Frequently Asked Questions
Directly with fire sprinkler contractors. We produce the drawings and calculations your crew needs to pull permits and finish the job.