Fire Sprinkler Design (NFPA 13)

Pythian Design provides complete automatic fire sprinkler system design in accordance with NFPA 13. Our services include hazard classification, density/area determination, hydraulic calculations, water supply coordination, and submittal package preparation. We deliver code-compliant designs with fast turnaround to keep your project on schedule.

NFPA 13 Design Process

Hazard Classification: Determine occupancy hazard (Light Hazard, Ordinary Hazard Groups 1 & 2, Extra Hazard, or Special) based on building use and contents.

System Type Selection: Select appropriate system type (wet pipe, dry pipe, preaction, or deluge) based on building conditions and hazard.

Density and Area Requirements: Apply NFPA 13 density/area curves to determine required sprinkler discharge density and design area.

Sprinkler Selection and Spacing: Select sprinkler type (standard response, quick response, ESFR, etc.) and determine maximum spacing per NFPA 13.

Hydraulic Calculations: Calculate required water supply (flow and pressure) using hydraulic calculation methods per NFPA 13.

Water Supply Verification: Coordinate with available water supply to ensure adequate flow and pressure, or design fire pump if needed.

Standards & Compliance

• NFPA 13: Standard for the Installation of Sprinkler Systems - the comprehensive standard for automatic sprinkler design.

• NFPA 20: Fire pump requirements if water supply is insufficient.

• NFPA 14: Standpipe systems where required.

• NFPA 24: Installation of private fire service mains.

• Local Amendments: Many jurisdictions have local amendments to NFPA 13 that must be followed.

What We Deliver

•Basis of design narrative with hazard classification justification

•Sprinkler system layout drawings showing all devices and piping

•Hydraulic calculation reports meeting NFPA 13 requirements

•Water supply analysis and flow test coordination

•Equipment specifications for sprinklers, pipe, fittings, and accessories

•Riser detail drawings

•Fire pump specifications if required

•Submittal package ready for AHJ review and approval

•Contractor coordination support during installation

Why Choose Pythian Design

Fast Hydraulic Calculations: Our streamlined process delivers calculation reports faster than traditional firms.

NFPA 13 Expertise: Deep understanding of the standard including recent code changes and local amendments.

Practical Designs: We balance code compliance with constructability and cost-effectiveness.

Submittal Package Excellence: Our submittals are thorough and pass AHJ review on first submission.

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