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Advisory Committee/Documents/Appendix C: Water Works Calculations
Appendix

Appendix C: Water Works Calculations

April 25, 2017Pages 239–2413 sections

Hydrant curves and fire flow requirement calculations based on the Fire Underwriters Survey (1999).

1. CALL TO ORDER
Total FUS fire-flow coverage required: 262.5 L/sAvailable fire flow: 185 L/s at 20 psi

Appendix C

Water Works Calculations

Page 239–241

Hydrant Curve for Junction JCTGA744 (VRFD283) at MDD

Hydrant Curve chart for Junction JCTGA744 (VRFD283) at MDD showing Residual Pressure (m) vs Available Flow (L/s). The chart highlights a point at 14.1 m (20 psi) of residual pressure corresponding to an available flow of 185 L/s.
Hydrant Curve chart for Junction JCTGA744 (VRFD283) at MDD showing Residual Pressure (m) vs Available Flow (L/s). The chart highlights a point at 14.1 m (20 psi) of residual pressure corresponding to an available flow of 185 L/s.
Page 239–241

Fire Flow Calculation - based on Fire Underwriters Survey, 1999

Building A (with Sprinklers)

McElhanney Project No: 16-057 (4)

Type of Construction:

  • C= 1.5 Wood Frame - structure essentially all combustible
  • 1.0 Brick or masonry walls - ordinary construction
  • 0.8 Unprotected metal structural components - non combustible
  • 0.6 Fully protected frame, floor, roof - fire resistive
  • C= 1.5

Finished Floor area:

  • A= 11,046 sq.m
  • 118,900 sq.ft = 11,046 sq.m

Estimated Fire-Flow:

  • F= 220C(A^1/2)
  • F= 34,683 L/min
  • F= 35,000 L/min (Rounded to nearest 1000)
  • F= 583.3 L/s

The Estimated Fire-Flow above can potentially be reduced as follows:

Occupancy:

% Description Calculations
-25 Non-combustible Amount of Fire-Flow reduction (Occupancy):
-15 Limited Combustible F= -145.8 L/s
0 Combustible
15 Free burning Estimated Reduced Fire-Flow (Occupancy)
25 Rapid burning F= 437.5 L/s
%= -25 %

Sprinkler Protection:

% Description Calculations
-50 Fully automated sprinklers Amount of Fire-Flow reduction (Sprinkler):
-40 F= 218.8 L/s
-30
0 No sprinklers Estimated Reduced Fire-Flow (Sprinkler)
%= -50 F= 218.8 L/s

Exposure Separation:

# of sides Separation Charge % Calculations
0 0 - 3 meters 0 Exposure Separation charge:
0 3.1 - 10 0 F= 43.8 L/s
0 10.1 - 20 0
1 20.1 - 30 10
0 30.1 - 45 0
0 45 - 0
1 10 % (75% max)

TOTAL FUS FIRE-FLOW COVERAGE REQUIRED:

  • F= 262.5 L/s
  • 15750.0 L/min

Based on D'Ambrosio Data Sheet, dated November 29, 2016 2016-12-01 16-057 FUS Calculation for Building A.xls 12/1/2016

Page 239–241
Extracted from: 2017 04 25 Joint Advisory Committee Meeting Agenda - Agenda - Pdf