21.02.045 Fire flow requirements for buildings

(1) Scope. This section is the procedure for determining fire flow requirements for all buildings or portions of buildings and substantial alterations to all buildings, hereafter constructed. Fire flow requirements are site and building specific. The requirements of this section supersede any conditions, notes, or requirements on any plat that do not meet the requirements of this section.

Nothing in this section shall be deemed to reduce, replace, or waive any water system requirements in the Clallam County Code, including, but not limited to, minimum fire flow and hydrant spacing, nor shall a reduction or exception to fire flow and hydrant spacing requirements reduce or exempt fire flow requirements of this section.

(2) Fire Flow Requirements for Buildings. Prior to the issuance of a building permit for any building, portion of a building, or substantial alteration thereto, fire flow shall be provided in the amount required by this section, including UGA designations.

(a) The fire flow and duration requirements for buildings other than one- and two-family dwellings (R-3) and private garages or agricultural buildings (U) shall not be less than that specified in Table A.

(b) Exception: Buildings for which fire flow is 500 gallons per minute or less, following all applicable modifications, are exempt from fire flow requirements.

(a) Fire Areas. Portions of buildings which are separated into one or more fire areas shall be constructed in accordance with the IBC.

(b) Fire Flow Reduction for Automatic Fire Sprinkler Systems. The fire flow requirement for buildings protected with an automatic fire sprinkler system installed with the water supply provisions specified in NFPA 13 may be reduced up to 75 percent. Fire flow requirements for buildings with a limited supply fire sprinkler system may be reduced 50 percent.

(c) Fire Flow Reduction for Central Station Fire Alarm Systems. The fire flow requirement for buildings protected throughout with an approved automatic fire detection system including approved, UL listed central station monitoring installed in accordance with the provisions of the IFC may be reduced an additional 250 gallons per minute.

Minimum Fire Flow – Table B
Minimum Required Fire Flow and Flow Duration for Nonresidential Buildings
FIRE AREA (square feet) x 0.0929 for m²					FIRE FLOW (gal./min.)²	FLOW DURATION (hours)
Type I-A, I-B¹	Type II-A, III-A¹	Type IV, V-A¹	Type II-B, III-B¹	Type V-B¹	x 3.785 for L/min.	FLOW DURATION (hours)
0 – 5,500	0 – 3,700	0 – 2,600	0 – 2,100	0 – 1,600	500	1
5,501 – 7,800	3,701 – 5,000	2,601 – 3,500	2,101 – 2,700	1,601 – 2,000	750	1
7,801 – 11,100	5,001 – 6,800	3,501 – 4,700	2,701 – 3,500	2,001 – 2,400	1,000	1
11,101 – 15,900	6,801 – 9,300	4,701 – 6,200	3,501 – 4,500	2,401 – 2,900	1,250	1
15,901 – 22,700	9,301 – 12,700	6,201 – 8,200	4,501 – 5,900	2,901 – 3,600	1,500	1
22,701 – 30,200	12,701 – 17,000	8,201 – 10,900	5,901 – 7,900	3,601 – 4,800	1,750	1
30,201 – 38,700	17,001 – 21,800	10,901 – 12,900	7,901 – 9,800	4,801 – 6,200	2,000	1
38,701 – 48,300	21,801 – 24,200	12,901 – 17,400	9,801 – 12,600	6,201 – 7,700	2,250	1
48,301 – 59,000	24,201 – 33,200	17,401 – 21,300	12,601 – 15,400	7,701 – 9,400	2,500	1
59,001 – 70,900	33,201 – 39,700	21,301 – 25,500	15,401 – 18,400	9,401 – 11,300	2,750	1
70,901 – 83,700	39,701 – 47,100	25,501 – 30,100	18,401 – 21,800	11,301 – 13,400	3,000	1
83,701 – 97,700	47,101 – 54,900	30,101 – 35,200	21,801 – 25,900	13,401 – 15,600	3,250	1
97,701 – 112,700	54,901 – 63,400	35,201 – 40,600	25,901 – 29,300	15,601 – 18,000	3,500	1
112,701 – 128,700	63,401 – 72,400	40,601 – 46,400	29,301 – 33,500	18,001 – 20,600	3,750	1
128,701 – 145,900	72,401 – 82,100	46,401 – 52,500	33,501 – 37,900	20,601 – 23,300	4,000	1
145,901 – 164,200	82,101 – 92,400	52,501 – 59,100	37,901 – 42,700	23,301 – 26,300	4,250	1
164,201 – 183,400	92,401 – 103,100	59,101 – 66,000	42,701 – 47,700	26,301 – 29,300	4,500	1
183,401 – 203,700	103,101 – 114,600	66,001 – 73,300	47,701 – 53,000	29,301 – 32,600	4,750	2
203,701 – 225,200	114,601 – 126,700	73,301 – 81,100	53,001 – 58,600	32,601 – 36,000	5,000	2
225,201 – 247,700	126,701 – 139,400	81,101 – 89,200	58,601 – 65,400	36,001 – 39,600	5,250	2
247,701 – 271,200	139,401 – 152,600	89,201 – 97,700	65,401 – 70,600	39,601 – 43,400	5,500	2
271,201 – 295,900	152,601 – 166,500	97,701 – 106,500	70,601 – 77,000	43,401 – 47,400	5,750	2
295,901 – Greater	166,501 – Greater	106,501 – 115,800	77,001 – 83,700	47,401 – 51,500	6,000	2
"	"	115,801 – 125,500	83,701 – 90,600	51,501 – 55,700	6,250	2
"	"	125,501 – 135,500	90,601 – 97,900	55,701 – 60,200	6,500	2
"	"	135,501 – 145,800	97,901 – 106,800	60,201 – 64,800	6,750	2
"	"	145,801 – 156,700	106,801 – 113,200	64,801 – 69,600	7,000	2
"	"	156,701 – 167,900	113,201 – 121,300	69,601 – 74,600	7,250	2
"	"	167,901 – 179,400	121,301 – 129,600	74,601 – 79,800	7,500	2
"	"	179,401 – 191,400	129,601 – 138,300	79,801 – 85,100	7,750	2
"	"	191,401 – Greater	138,301 – Greater	85,101 – Greater	8,000	2

1Types of construction are based on the IBC.