Help - Design Criteria

Common issues:

Why isn't my area entered?:
  • Make sure to double check the output, as corrections are done automatically for area size. The output will always note when this occurs.

NFPA Reference:

These calculations are based on the following sections:
  • Ranges come from: Section 11.2, Page 593, Figure 11.2.3.1.1 Density/Area Curves
  • Correction to area for Quick response systems from: Section 11.2, Page 598, Figure 11.2.3.2.3.1 Design Area Reduction
  • Correction for area if ceiling slope is above 2/12 from: Section 11.2, Page 599, 11.2.3.2.4 Sloped Ceilings from NFPA 13
  • Correction for area if the system is Dry from: Section 11.2, Page 600, 11.2.3.2.5 Dty Pipe and Double Interlock
  • Correction for area if the system has unsprinklered combustible concealed spaces from: Section 11.2, Page 594, 11.2.3.1.4 Restrictions Part 3
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