Dimensional standards
Servicing
- Geographic extent
- All areas of special flood hazard as shown on the Flood Insurance Rate Map (FIRM) and included in the Flood Insurance Study (FIS) for the City of Franklin.
Extracted standards
14 individual requirements pulled out of this section’s prose, each with the sentence it came from.
Floodplain
- Flood opening net area ratio1 sqin/sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
The total net area of all openings must be at least one (1) square inch for each square foot of enclosed area subject to flooding.
- Freeboard above base flood elevation2 ft
The City of Franklin requires BFE plus twenty-four inches of freeboard.
- Maximum heightMaximum heightThe tallest a building may be, given in feet, in storeys, or both — whichever binds first. of flood opening bottom above grade1 ft
The bottom of all required openings shall be no higher than one (1) foot above the adjacent grade.
- Minimum number of flood openings2 count
Provide a minimum of two openings on different sides of each enclosed area subject to flooding.
Other
- Anchoring to prevent flotation
New construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure.
- Flood damage resistant materials
New construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage.
- Maximum accessoryAccessory useA secondary activity customarily incidental to the main use of the lot — a garage, a home office. structure floor area600 sqftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000.
Accessory structures are not to exceed 600 square feet in total floor area.
- On-site waste disposal flood protection
On-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding.
- Zoning permit required
All uses, activities, and development occurring within any floodplain district, including placement of manufactured homes, shall be undertaken only upon the issuance of a zoning permit.
- Sanitary sewage system flood protection
New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters.
- Subdivision BFE data threshold5 lots or acresacre43,560 square feet — about the size of an American football field without the end zones.
Base flood elevation data shall be obtained from other sources or developed using detailed methodologies... for subdivision proposals and other proposed development proposals (including manufactured home parks and subdivisions) that exceed five lots or five acres, whichever is the lesser.
- Utility equipment flood protection
Electrical, heating, ventilation, plumbing, air conditioning equipment and other service facilities shall be designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
- Maximum lot size for varianceVariancePermission to depart from a specific dimensional rule, granted on a showing of hardship.0.5 acresacre43,560 square feet — about the size of an American football field without the end zones.
While the granting of variances generally is limited to a lot size less than one-half acre...
- Water supply system flood protection
New and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system.
From the ordinance
New construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement. ... The City of Franklin requires BFE plus twenty-four inches of freeboard.