Dimensional standards
Servicing
- Geographic extent
- Special Flood Hazard Area (SFHA)
Extracted standards
3 individual requirements pulled out of this section’s prose, each with the sentence it came from.
Floodplain
- 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 foot above the adjacent grade.
- Minimum 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 square inch for each square foot of enclosed area subject to flooding.
- Minimum number of flood openings2 count
Provide a minimum of two openings on different sides of each enclosed area subject to flooding.
From the ordinance
Include measures to automatically equalize hydrostatic flood forces on walls by allowing for the entry and exit of floodwaters. To meet this requirement, the openings must either be certified by a professional engineer or architect or meet the following minimum design criteria: a. Provide a minimum of two openings on different sides of each enclosed area subject to flooding. b. The total net area of all openings must be at least one square inch for each square foot of enclosed area subject to flooding. c. If a building has more than one enclosed area, each area must have openings to allow floodwaters to automatically enter and exit. d. The bottom of all required openings shall be no higher than one foot above the adjacent grade. e. Openings may be equipped with screens, louvers, or other opening coverings or devices, provided they permit the automatic flow of floodwaters in both directions. f. Foundation enclosures made of flexible skirting are not considered enclosures for regulatory purposes, and, therefore, do not require openings. Masonry or wood underpinning, regardless of structural status, is considered an enclosure and requires openings as outlined above.