Fire Sprinkler Design Engineer: Shop Drawings and Hydraulic Calculations
DGA is the fire sprinkler design engineer and engineer of record for contractors, architects and owners in NYC, New Jersey, Pennsylvania, Maryland, Delaware, Washington, Oregon and Florida, delivering construction-ready NFPA 13 shop drawings and fire sprinkler hydraulic calculations for new systems and for sprinkler system modifications in existing buildings. Every package is prepared and sealed by a licensed Professional Engineer.
What’s Included
What Sprinkler Shop Drawings and Hydraulic Calculations Include
DGA delivers construction-ready fire sprinkler shop drawings and hydraulic calculations for commercial, industrial, and institutional projects.
Coordinated Sprinkler Shop Drawings
Floor plans, riser details, sections, and hanger details.
Hydraulic Calculations per NFPA 13
Including water supply analysis.
Submittal Packages
Equipment and material schedules, coordinated with your general contractor and the authority having jurisdiction.
PE-Stamped and NICET-Certified
Every package is produced by NICET-certified designers and bears the seal of a licensed Professional Engineer, built to move through plan review smoothly.
Who DGA Serves
Who Hires a Fire Protection Engineer of Record
Client Types
Who DGA Serves
- Fire Protection Contractors: Outsource shop drawings and hydraulic calculations, prepared and sealed under one engineer’s responsible charge, without adding a designer to payroll.
- General Contractors: Code-compliant, coordinated designs that reduce install-phase delays and inspection comments.
- Developers: Fast engineering turnaround and stamped drawings that satisfy plan reviewers and keep schedules moving.
- Building Owners: New construction, retrofits, and tenant fit-outs across NY, NJ, PA, MD, DE, WA, OR, and FL.
What We Deliver
Shop Drawing & Calculation Packages
- NFPA 13 Shop Drawings: Coordinated sprinkler layouts, riser details, and fabrication-ready plans.
- Hydraulic Calculations: Full-network pipe flow analysis, hazard classification, and municipal water supply analysis.
- PE Seal: Packages DGA prepares carry the seal of the engineer in responsible charge, for the building department, fire marshal, or owner that requires one.
- Submittal-Ready Packages: Calculations, material data sheets, and sealed drawings ready for AHJ submittal.
Process
How a Shop Drawing Package Comes Together
Every package follows the same disciplined sequence, from backgrounds to approved submittal.
Backgrounds and Existing Conditions
DGA starts from your architectural backgrounds and structural drawings, with a field survey when the building already exists.
Sprinkler Layout per NFPA 13
Head placement, spacing, and hazard classification laid out to NFPA 13, matched to the occupancy and the hazard present.
Hydraulic Calculations
Pipe-by-pipe calculations built on water supply data, proving the system delivers the required density and pressure at the most remote heads.
Trade Coordination
Drawings coordinated with HVAC, plumbing, electrical, and structural so mains, branch lines, hangers, and heads fit the building as it will be built.
Submittal and AHJ Review
A complete package submitted to the authority having jurisdiction. DGA responds to plan review comments and revises the drawings until the submittal is approved.
When It Applies
When You Need Sprinkler Shop Drawings and Hydraulic Calculations
- New construction and building additions
- Tenant fit-outs and interior renovations
- Modifications or extensions to an existing sprinkler system
- Change of occupancy or hazard classification
- Answering AHJ plan review comments on a prior submittal
This work is common on residential, commercial high-rise, and retail and shopping center projects.
FAQ
Sprinkler Shop Drawing Questions, Answered
What does DGA need to get started?
Architectural backgrounds in CAD, available water supply data such as a recent flow test, and the occupancy or hazard classification. DGA will tell you exactly what is missing before work begins.
Are the drawings PE-stamped?
Yes. Every package is produced by NICET-certified designers and bears the seal of a Professional Engineer licensed in the state where the project is located.
Do you handle AHJ plan review comments?
Yes. Responding to review comments and revising the submittal until approval is part of the service.
What do the hydraulic calculations prove?
That the water supply can deliver the required flow, density, and pressure to the most hydraulically remote sprinklers, calculated per NFPA 13.
Do sprinkler shop drawings need a PE stamp?
Not always. Many jurisdictions accept sprinkler shop drawings prepared by a NICET-certified designer, while others, and many owners, require a Professional Engineer’s seal. Every DGA package has both: NICET-certified preparation and a PE seal.
From the Technical Library
Related Services
Related Services
Also see FM Global Compliance for insurer recommendation responses, and PE Inspections & Certification Letters for sealed sprinkler certification letters.
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