1 Del. Admin. Code § 702-6-7.0

Current through Register Vol. 28, No. 5, November 1, 2024

Section 702-6-7.0 - Dry Hydrants

7.1 Where there is not a public water system or a central water system, the State Fire Marshal may require the installation of a dry hydrant at the nearest public body of water to provide access to a water source for fire protection for all buildings of less than 10,000 square feet of aggregate gross floor area.

7.2 The provision in subsection 7.1 of this Chapter for the providing of a dry hydrant shall also be meant that access to the dry hydrant and provisions for positioning fire apparatus to make use of the dry hydrant shall be provided.

7.3 The requirements of subsection 7.1 and subsection 7.2 of this Chapter shall meet the standards and specifications pursuant to the Construction Specifications for Dry Hydrant and Water Delivery Systems, Delaware 1991, prepared by the U. S. Department of Agriculture Soil Conversation Service and any updates thereto.

7.4 It is the responsibility of the developer, builder and/or owner to apply for and obtain any required permits for the installation of the dry hydrant.

7.5 It is the responsibility of the project developer, builder, and/or owner to provide the dry hydrants and any needed construction operations to place the dry hydrants in service.

7.6 All dry hydrants installed and accepted under this section shall be inspected, tested, and maintained in accordance with Regulation 703, Chapter 1, subsection 4.9.

Fire Flow Table 1*

The requirements of Fire Flow Table 1 apply to rural areas where public, private, or central water is not available and where specified elsewhere in these Regulations.

Occupancy	Maximum Aggregate Gross Square Footage	Provide a fire alarm system per Ch. 6, § 3.1.4	Minimum Set Back from all property lines	Maximum Height	Exposure Hazard on the Same Property	Internal Fire Separation	Apply
One & Two - Family Detached Dwellings	10,000	no	15'	3 Stories 35'	10'+	n/a	NFPA 1142
Multi-Family & Other Residential	10,000	no	15'	3 Stories 35'	10'+	n/a	NFPA 1142
Rowhouses & Townhouses	10,000	no	15'	3 Stories 35'	10'+	2-Hr rated wall Reg. 701 Chapter 2	NFPA 1142
Assembly	5,000	no	15'	1 Story 15'	10'+	n/a	NFPA 1142
Assembly1	5,001 to 10,000	YES	15'	2 Stories 30'	10'+	n/a	NFPA 1142
Health Care Business Education	10,000	no no no	15'	2 Stories 30'	10'+	n/a	NFPA 1142
Storage Industrial Mercantile	5,000	no no no	15'	To be reviewed on an individual basis	15'+	n/a	NFPA 1142
Storage1 Industrial1 Mercantile1	5,001 to 10,000	YES YES YES	25'	To be reviewed on an individual basis	15'+	n/a	NFPA 1142
Mini-Storage	5,000	no	15'	2 Stories 30'	15'+	n/a	NFPA 1142
Mini-Storage	5,001 to 10,000	no	25'	2 Stories 30'	15'+	n/a	NFPA 1142

1 A fire alarm signaling system shall be provided. See subsection 3.1.4.

*A-Fire Flow Table 1.

The requirements of Fire Flow Table 1 apply to rural areas where public, private or central water is not available. Where Exposure Hazard, Same Property (EHSP) or Minimum Set Back from all property lines (MSB) cannot be met, the following table may be utilized.

Maximum Aggregate Gross Square Footage	Fire Separation Distance (or Exposure Hazard, Same Property)	Exterior Wall Fire Resistance Rating
One- and Two-Family Detached Dwellings	10,000	Less than 10 feet	1-Hour
Multi-Family & Other Residential	10,000	Less than 10 feet	2-Hour
Rowhouses & Townhouses	10,000	Less than 10 feet	2-Hour
Assembly	10,000	Less than 5 feet	2-Hour
		5 to 10 feet	1-Hour
Health Care Business Education	10,000	Less than 5 feet	2-Hour
		5 to 10 feet	1-Hour
Storage Industrial Mercantile	10,000	Less than 5 feet	2-Hour
		5 to 15 feet	1-Hour
Mini Storage	10,000	Less than 5 feet	2-Hour
		5 to 15 feet	1-Hour

Fire Flow Table 2

The requirements of Fire Flow Table 2 apply to areas where there is a public, private, or central water system.

Occupancy	Maximum Aggregate Gross Square Footage	Internal Fire Separation	Flow Required	Hydrant Spacing
One- and Two-Family Detached Dwellings 1	10,000	n/a	500 GPM 20 PSI Residual Pressure 1 Hour Duration	800 feet on center
Other Residential1	10,000	n/a	1,000 GPM 20 PSI Residual Pressure 1 Hour Duration	800 feet on center
Rowhouses1 & Townhouses1	10,000	2-Hr rated wall	1,000 GPM 20 PSI Residual Pressure 1 Hour Duration	800 feet on center
		Reg. 701 Chapter 2
Assembly Health Care Business Education	10,000	n/a	1,000 GPM 20 PSI Residual Pressure 1 Hour Duration	800 feet on center
Storage Industrial Mercantile	10,000	n/a	1,500 GPM 20 PSI Residual Pressure 2 Hour Duration	800 feet on center
Mini-Storage	10,000	n/a	750 GPM 20 PSI Residual Pressure 1 Hour Duration	800 feet on center

1 Sites in New Castle County are subject to the provisions of New Castle County Code Chapter 40 Article 5. See Note on § 1.4.1 and § 1.4.2.

Note: Fire Flow Table 2, Hydrant Spacing. The phrase, "on center" is intended to represent the maximum distance fire hydrants are spaced from each other. Proper application of this intention would generally provide a fire department with a maximum "hose lay" to a hydrant that would not exceed 500 feet for One & Two Family Dwellings, and 400 feet for all other structures.

Fire Flow Table 3 It is the intent of Fire Flow Table 3 to allow a credit for water flow that is available on site, but does not meet the full water flow requirements of Fire Flow Table 2. However, the available water flow on site shall be a minimum of 500 GPM, otherwise the requirements of Fire Flow Table 1 shall be applied to the site. This Table does not apply to new public, private, nor central water systems, including municipalities.

Occupancy	Maximum Aggregate Gross Square Footage	Minimum Set Back from all property lines	Exposure Hazard on the Same Property	Internal Fire Separation
One- and Two-Family Dwellings, Multi-family, and Other residential	10,000	*15'	*10'+	n/a
Rowhouses Townhouses	10,000	*15'	10'+	Two-Hour Rated Design Wall Reg. 701, Chapter 2
Assembly	10,000	*15'	*10'+	n/a
Health Care Business Education	10,000	*15'	*10'+	n/a
Storage Industrial Mercantile	10,000	*25'	*15'+	n/a
Mini Storage	5,000	*15'	*15'+	n/a
Mini Storage	5,001 to 10,000	*25'	*15'+	n/a

Note: Fire Flow Table 3: For example, if 1,000 GPM is required for a 9,000 sq. ft. Business Occupancy business occupancy, but only 500 GPM is available, or 50%, then the required setbacks shall be reduced by 50% so that the Minimum Setback (MSB) from property lines would be 7.5 feet, instead of 15 feet, and the Exposure Hazard on the Same Property (EHSP) would be five feet, instead of ten feet.

1 Del. Admin. Code § 702-6-7.0

25 DE Reg. 74 (7/1/2021) (final)