Appendix D: Fire Flow Estimates and Hydrant Curve Data
Calculations of required fire-flow based on the 2020 Fire Underwriters Survey for the North and East buildings of the development.
APPENDIX D
FIRE FLOW ESTIMATES AND HYDRANT CURVE DATA
Underground Utilities Brief | Prepared for Boardwalk REIT 339 / 341 / 345 Island Highway, View Royal, BC
Fire Flow Calculation - based on 2020 Fire Underwriters Survey
McElhanney Proj.# 2241-22-149 #339 Island Highway - East Building (East Section)
Construction Coefficient (C)
| C= | Construction Type |
|---|---|
| 1.5 | for Type V Wood Frame Construction |
| 0.8 | for Type IV-A Mass Timber Construction |
| 0.9 | for Type IV-B Mass Timber Construction |
| 1.0 | for Type IV-C Mass Timber Construction |
| 1.5 | for Type IV-D Mass Timber Construction |
| 1.0 | for Type III Ordinary Construction (Joisted Masonry) |
| 0.8 | for Type II Noncombustible Construction |
| 0.6 | for Type I Fire Resistive Construction |
C = 1.5 Type IV-C
Total Effective Floor Area (A)
A = 4100 sq.m 44035 sq.ft = 4091 sq.m
Required Fire Flow (RFF)
F = 220C(A^1/2) F = 21130 L/min F = 21000 L/min (Rounded to nearest 1000) F = 350.0 L/s
Occupancy and Contents Adjustment Factor
| % | Content Description |
|---|---|
| -25 | Noncombustible Contents |
| -15 | Limited Combustible Contents |
| 0 | Combustible Contents |
| 15 | Free Burning Contents |
| 25 | Rapid Burning Contents |
%= -15 Residential Occupancies, Limited (Description of Major Occupancy and Contents)
Amount of Fire-Flow reduction (Occupancy): F = -52.5 L/s Estimated Reduced Fire-Flow (Occupancy): F = 297.5 L/s
Automatic Sprinkler Protection
| Sprinkler Credits | Automatic Sprinkler System Design |
|---|---|
| -30% | design and installed to NFPA 13 |
| -10% | water supply stnd for system and FD Hoses |
| -10% | Fully supervised system |
| -25% | Community Level Automatic Sprinkler (see guide pg 28) |
%= -50 Amount of Fire-Flow reduction (Sprinkler): F = -148.8 L/s
Exposure Adjustment Charge
| # of sides | Separation | Charge % | Notes |
|---|---|---|---|
| 1 | 0 - 3 m | 25 | North to Building L Firewall (0m) |
| 0 | 3.1 - 10 m | 0 | |
| 0 | 10.1 - 20 m | 0 | |
| 0 | 20.1 - 30 m | 0 | |
| 3 | > 30 m | 0 | East to Ex. Firehall (34m), South to Prop Line (32m), West to South Building (22m [auto sprin]) |
Total # of sides: 4 Charge %: 25% (75% max) Exposure Separation charge: F = 74.4 L/s
See Table 6 for exposure adjustment charges for subject building considering construction type of expose building face
Estimated Fire-Flow (with reductions & charges)
F = 223.1 L/s
TOTAL FUS FIRE-FLOW COVERAGE REQUIRED:
F = 223.1 L/s 13387.5 L/min
2023-02-23 22-149 FUS 2/23/2023
Fire Flow Calculation - based on 2020 Fire Underwriters Survey
McElhanney Proj.# 2241-22-149 #339 Island Highway - East Building (North Section)
Construction Coefficient (C)
| C= | Construction Type |
|---|---|
| 1.5 | for Type V Wood Frame Construction |
| 0.8 | for Type IV-A Mass Timber Construction |
| 0.9 | for Type IV-B Mass Timber Construction |
| 1.0 | for Type IV-C Mass Timber Construction |
| 1.5 | for Type IV-D Mass Timber Construction |
| 1.0 | for Type III Ordinary Construction (Joisted Masonry) |
| 0.8 | for Type II Noncombustible Construction |
| 0.6 | for Type I Fire Resistive Construction |
C = 1.5 Type IV-C
Total Effective Floor Area (A)
A = 3400 sq.m 36297 sq.ft = 3372 sq.m
Required Fire Flow (RFF)
F = 220C(A^1/2) F = 19242 L/min F = 19000 L/min (Rounded to nearest 1000) F = 316.7 L/s
Occupancy and Contents Adjustment Factor
| % | Content Description |
|---|---|
| -25 | Noncombustible Contents |
| -15 | Limited Combustible Contents |
| 0 | Combustible Contents |
| 15 | Free Burning Contents |
| 25 | Rapid Burning Contents |
%= -15 Residential Occupancies, Limited (Description of Major Occupancy and Contents)
Amount of Fire-Flow reduction (Occupancy): F = -47.5 L/s Estimated Reduced Fire-Flow (Occupancy): F = 269.2 L/s
Automatic Sprinkler Protection
| Sprinkler Credits | Automatic Sprinkler System Design |
|---|---|
| -30% | design and installed to NFPA 13 |
| -10% | water supply stnd for system and FD Hoses |
| -10% | Fully supervised system |
| -25% | Community Level Automatic Sprinkler (see guide pg 28) |
%= -50 Amount of Fire-Flow reduction (Sprinkler): F = -134.6 L/s
Exposure Adjustment Charge
| # of sides | Separation | Charge % | Notes |
|---|---|---|---|
| 1 | 0 - 3 m | 25 | South to Building L Firewall (0m) |
| 0 | 3.1 - 10 m | 0 | |
| 0 | 10.1 - 20 m | 0 | |
| 0 | 20.1 - 30 m | 0 | |
| 3 | > 30 m | 0 | East to Firehall (34m), North to # IslHwy (44m), West to North Building (13m [auto sprinker]) |
Total # of sides: 4 Charge %: 25% (75% max) Exposure Separation charge: F = 67.3 L/s
See Table 6 for exposure adjustment charges for subject building considering construction type of expose building face
Estimated Fire-Flow (with reductions & charges)
F = 201.9 L/s
TOTAL FUS FIRE-FLOW COVERAGE REQUIRED:
F = 201.9 L/s 12112.5 L/min
2023-02-23 22-149 FUS 2/23/2023