Reference library
Fire protection reference tables
Structured lookup tables that support calculator setup and engineering checks.
Tables
8
Engineering lookup pages
Linked tools
30
Calculator library
Use
Setup
Inputs and screening checks
How reference tables support the calculators
Use these tables to select C values, K-factors, internal pipe diameters, equivalent fitting lengths, density and area baselines, AWG resistance, and hazard classes before running a calculator.
Tables
| Reference table | Lookup purpose | Used by | Open |
|---|---|---|---|
Hazen-Williams C Values for Fire Sprinkler Pipe Hazen-Williams C values pipe | Lookup common Hazen-Williams roughness coefficients for steel, copper, CPVC, cast iron, and dry-system sprinkler pipe materials. | 2 linked calculators | Open |
Fire Sprinkler K-Factor Table sprinkler K-factor table | Reference common sprinkler K-factor values used for quick flow and pressure checks in NFPA 13 style sprinkler calculations. | 2 linked calculators | Open |
Sprinkler Pipe Internal Diameter Reference pipe internal diameter schedule 10 40 | Compare typical Schedule 10 and Schedule 40 internal pipe diameters used in sprinkler hydraulic and velocity calculations. | 2 linked calculators | Open |
Equivalent Pipe Lengths for Common Fittings equivalent pipe length fittings NFPA 13 | Reference common equivalent length allowances for fittings when estimating sprinkler pipe friction loss and remote-area demand. | 2 linked calculators | Open |
NFPA 13 Design Density and Area Reference NFPA 13 density area curve | Lookup common density and design-area combinations for light, ordinary, and extra hazard sprinkler design screening. | 2 linked calculators | Open |
AWG Wire Resistance Table for Fire Alarm Circuits AWG wire resistance table | Lookup copper conductor resistance values for fire alarm NAC and SLC voltage drop calculations using common AWG sizes. | 2 linked calculators | Open |
Occupancy Hazard Classification Reference NFPA 13 occupancy hazard classification | Screen common occupancy examples against broad NFPA 13 hazard classes for early sprinkler design scoping and calculator setup. | 2 linked calculators | Open |
US Code Adoption and AHJ Checkpoints US fire code adoption AHJ checklist | Use this jurisdiction checklist before applying NFPA calculators on a United States project because adopted editions, local amendments, and AHJ direction can vary. | 3 linked calculators | Open |