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# 23.3 Hydraulic Calculation Forms

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Hydraulic calculations shall be prepared on form sheets that include a summary sheet, detailed worksheets, and a graph sheet.

*[See Figure A.23.3.2(a), Figure A.23.3.3, and Figure A.23.3.4 for copies of typical forms.]*The summary sheet shall contain the following information, where applicable:

- Date
- Location
- Name of owner and occupant
- Building number or other identification
- Description of hazard (for storage applications, the commodity classification, storage height, and rack configuration shall be included)
- Name and address of contractor or designer
- Name of approving agency
- System design requirements, as follows:
- Design area of water application, ft
^{2}(m^{2}). - Minimum rate of water application (density), gpm/ ft
^{2}(mm/min). Where sprinklers are listed with minimum water application in gpm (L/min) or pressure in psi (bar), the minimum rate of water application shall be indicated in gpm (L/min) or pressure, psi (bar). - Area per sprinkler, ft
^{2}(m^{2}).

- Design area of water application, ft
- Total water requirements as calculated, including allowance for inside hose, outside hydrants, and water curtain and exposure sprinklers
- Allowance for in-rack sprinklers, gpm (L/min)
- Limitations (dimension, flow, and pressure) on extended coverage or other listed special sprinklers

Detailed worksheets or computer printout sheets shall contain the following information:

- Sheet number
- Sprinkler description and discharge constant
*(K)* - Hydraulic reference points
- Flow in gpm (L/min)
- Pipe size
- Pipe lengths, center-to-center of fittings
- Equivalent pipe lengths for fittings and devices
- Friction loss in psi/ft (bar/m) of pipe
- Total friction loss between reference points
- In-rack sprinkler demand balanced to ceiling demand
- Elevation head in psi (bar) between reference points
- Required pressure in psi (bar) at each reference point
- Velocity pressure and normal pressure if included in calculations
- Notes to indicate starting points or reference to other sheets or to clarify data shown
- *Diagram to accompany gridded system calculations to indicate flow quantities and directions for lines with sprinklers operating in the remote area
- Combined K-factor calculations for sprinklers on drops, armovers, or sprigs where calculations do not begin at the sprinkler

A graphic representation of the complete hydraulic calculation shall be plotted on semiexponential graph paper (Q

^{1.85}) and shall include the following:- Water supply curve
- Sprinkler system demand
- Hose allowance (where applicable)
- In-rack sprinkler demand (where applicable)

Hydraulic calculations shall be prepared on form sheets that include a summary sheet, a graph sheet, a water supply analysis, a node analysis, and detailed worksheets.

The data shall be presented in the order shown in Figure 23.3.5.1.2(a) through Figure 23.3.5.1.2(d).

**FIGURE 23.3.5.1.2(a) Summary Sheet.**

**FIGURE 23.3.5.1.2(b) Graph Sheet.**

**FIGURE 23.3.5.1.2(c) Supply and Node Analysis Sheet.**

**FIGURE 23.3.5.1.2(d) Detailed Worksheet.**

The summary sheet as shown in Figure 23.3.5.1.2(a) shall contain the following information, where applicable:

- Project name and date
- Location (including street address)
- Owner or expected occupant of space being designed
- Name, address, and phone number of installing contractor
- Name and phone number of designer
- Authority having jurisdiction
- Standard or document system is being designed to, including the edition of the document
- Design area number and location
- Drawing or sheet number where design area is located
- Occupancy or commodity classification and information
- For storage applications (including miscellaneous), additional information including storage height, ceiling height, storage configuration, aisle width, orientation of upright or pendent, sprinkler K-factor and sprinkler temperature, and the table and or curve utilized in the design
- System type, including the system volume with type of protection system indicated in the notes
- Sprinkler type, including coverage and response type
- Slope of roof or ceiling within the design area
- System design requirements, as follows:
- Design area of application, ft
^{2}(m^{2}) - Minimum rate of water application (density), gpm/ ft
^{2}(mm/min) - Area per sprinkler, ft
^{2}(m^{2}) - Number of sprinklers calculated

- Design area of application, ft
- Total water requirements as calculated, including allowance for inside hose, outside hydrants, water curtain, and exposure sprinklers, and allowance for in-rack sprinklers, gpm (L/min)
- Ceiling height if used for quick response sprinkler reduction
- Elevation of highest calculated sprinkler
- Water supply information, including the following:
- Notes that include peaking information for calculations performed by a computer program, type of preaction system, limitations (dimension, flow, and pressure) on extended-coverage or other listed special sprinklers, system type, including the system volume

A graphic representation of the complete hydraulic calculation shall be plotted on semiexponential graph paper (Q

^{1.85}) as shown in Figure 23.3.5.1.2(b) and shall include the following:- Water supply curve
- Sprinkler system demand
- Hose demand (where applicable)
- In-rack sprinkler demand (where applicable)
- Additional pressures supplied by a fire pump or other source (when applicable)

Information summarized from the graph sheet as shown in Figure 23.3.5.1.2(c) shall include the following:

- Node tag at the source
- Static pressure [psi (bar)] available at the source
- Residual pressure [psi (bar)] available at the source
- Total flow [gpm (L/min)] available at the source
- Available pressure [psi (bar)] at the source when the total calculated demand is flowing
- Total calculated demand [gpm (L/min)] at the source
- Required pressure [psi (bar)] when flowing total calculated demand

Organized information as shown in Figure 23.3.5.1.2(c) regarding the node tags given to each hydraulic reference point on the system as indicated on the shop drawings shall include the following information:

- Node tag for each specific point on the system used in the hydraulic calculations
- Elevation in ft (m) of each node tag
- K-factor of flowing nodes (such as sprinklers)
- Hose allowance in gpm (L/min) requirements for the node tag
- Pressure in psi (bar) at the node
- Discharge in gpm (L/min) calculated at the node
- Notes that indicate any special requirements for the node

Detailed worksheets as shown in Figure 23.3.5.1.2(d) or computer printout sheets shall contain the following information:

- Sheet number
- Hydraulic reference points used in each step
- Elevation in ft (m) at each hydraulic reference point
- Sprinkler description and discharge constant (
*K)*for the flowing reference point - Flow in gpm (L/min) for the flowing reference point (when applicable)
- Total flow in gpm (L/min) through each step
- Nominal pipe size in in. (mm)
- Actual internal diameter of pipe in in. (mm)
- Quantity and length in ft (m) of each type of fitting and device
- Pipe lengths in ft (m), center-to-center of fittings
- Equivalent pipe lengths in ft (m) of fittings and devices for the step
- Total equivalent length in ft (m) of pipes and fitting for the step
- C-factor used in each step
- Friction loss in psi/ft (bar/m) of pipe
- Sum of the pressures from the previous step (starting pressure at beginning)
- Elevation head in psi (bar) between reference points
- Total friction loss in psi (bar) between reference points
- Required pressure in psi (bar) at each reference point
- Notes and other information shall include the following:
- Velocity pressure and normal pressure if included in calculations
- In-rack sprinkler demand balanced to ceiling demand
- Notes to indicate starting points or reference to other sheets or to clarify data shown
- Diagram to accompany gridded system calculations to indicate flow quantities and directions for lines with sprinklers operating in the remote area
- Combined K-factor calculations for sprinklers on drops, armovers, or sprigs where calculations do not begin at the sprinkler
- The pressure [psi/(bar)] loss assigned the backflow device when included on a system
- Friction factor and Reynolds number when the Darcy-Weisbach equation is used

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