(1) Section B103 of the International Fire Code is amended by substituting subsection B103.1 with the following:

B103.1 Increases. The fire chief is authorized to increase the fire flow requirements where exposures could be impacted by fire. An increase shall not be more than twice that required for the building under consideration.

Exception: For one- and two-family residences when either of the following conditions apply.

1. The building and exposure are equipped with the 1-hour fire resistant rated exterior walls tested in accordance with ASTM E 119 or UL 263 with exposure on the exterior side and projections with 1-hour underside protection, fire blocking installed from the wall top plate to the underside of the roof sheathing and no gable vent openings.

2. The walls are a distance greater than 11' to the nearest exposure or lot line; or face an unbuildable lot, tract or buffer. The distance shall be measured at right angles from the face of the wall.

(2) Section B105 of the International Fire Code is amended by substituting subsection B105.1 with the following:

B105.1 One- and two-family dwellings. Fire-flow requirements for one- and two-family dwellings shall be in accordance with Sections B105.1.1 through B105.1.3.

B105.1.1 Buildings less than 3,600 square feet. The minimum fire-flow and flow duration requirements shall be 1,000 gallons per minute for 1 hour.

Exception: A reduction in required fire-flow of 50 percent, as approved, is allowed when the building is equipped with an approved automatic sprinkler system.

B105.1.2 Buildings greater than 3,600 square feet. The minimum fire-flow and flow duration requirements for shall not be less than that specified in Table B105.1(2).

Exception: A reduction of fire-flow and flow duration to 1,000 gallons per minute for 1 hour, as approved, is allowed when the building is equipped with the following:

1. An approved automatic sprinkler system

B105.2 Buildings other than one- and two-family dwellings. The minimum fire-flow and flow duration for buildings other than one- and two-family dwellings shall be as specified in Table B105.1(2).

Exception: A reduction in required fire-flow of 50 percent, as approved, is allowed when the building is provided with an approved automatic sprinkler system. The resulting fire-flow shall not be less than 1,500 gallons per minute for the prescribed duration as specified in Table B105.1(2).

B105.2.1 Tents and Membrane structures. No fire flow is required for tents and membrane structures.

B105.2.2 Accessory residential Group U buildings. Accessory residential Group U buildings shall comply with the requirements of B105.1.

(3) Section B105 of the International Fire Code is amended by deleting the following:

Table B105.1(1) Required Fire-Flow for One- and Two-family Dwellings, Group R-3 and R-4 Buildings and Townhouses

Table B105.2 Required Fire-Flow for Other than One- and Two-family Dwellings, Group R-3 and R-4 Buildings and Townhouses

(4) Section B105 of the International Fire Code is amended by adding new subsection B105.4 as follows:

B105.4 Urban Separator (R-1) Alternative Fire Flow Mitigation. For development projects within the Urban Separator (R-1) zone, the following alternative fire flow mitigations are approved for use in accordance with Sections B105.4.1 through B105.4.2

B105.4.1 One- and two-family dwellings. Fire flow will not be required for one- and two-family dwellings if all of the following mitigations are met:

1. The fire-flow calculation area is less than 3600 square feet

2. The construction type of the dwelling is Type VA

3. The dwelling is equipped with a central station monitored automatic fire sprinkler system installed in accordance with Section 903.3.1.3 with a water supply of no less than 30 minutes

4. The dwelling has a fire separation distance of no less than 150 feet on all sides

B105.4.2 Buildings other than one- and two-family dwellings. Fire flow will not be required for buildings other than one- and two-family dwellings if all of the following mitigations are met:

1. The fire-flow calculation area is less than 3600 square feet

2. The construction type of the dwelling is not Type VB

3. The dwelling is equipped with a central station monitored automatic fire sprinkler system installed in accordance with Section 903.3.1.1 with a water supply of no less than 30 minutes

4. The dwelling has a fire separation distance of no less than 150 feet on all sides