17.28.170 STANDARDS FOR MANUFACTURED HOMES AND MANUFACTURED HOME PARKS AND SUBDIVISIONS.
   .010   Anchoring. All manufactured homes and additions to manufactured homes shall be anchored and elevated to resist flotation, collapse, or lateral movement by one of the following methods:
   .0101   By providing an anchoring system designed to withstand horizontal forces of twenty-five pounds per square foot and up-lift forces of fifteen pounds per square foot;
   .0102   By providing over-the-top and frame ties to ground anchors. Specifically:
   (i)   Over-the-top ties be provided at each of the four corners of the manufactured home, with two additional ties per side at intermediate locations, with manufactured homes less than fifty feet long require only one additional tie per side;
   (ii)   Frame ties be provided at each corner of the home with five additional ties per side at intermediate points, with manufactured homes less than fifty feet long require only four additional ties per side; and components of the anchoring system be capable of carrying a force of four thousand eight hundred pounds.
   .020   Elevation. All manufactured homes that are placed, replaced, or substantially improved on sites located: (a) outside of a manufactured home park or subdivision; (b) in a new manufactured home park or subdivision; (c) in an expansion to an existing manufactured home park or subdivision; or (d) in an existing manufactured home park or subdivision upon which a manufactured home has incurred "substantial damage" as the result of a flood, shall be elevated on a permanent foundation such that the lowest floor, or bottom of the lowest horizontal member of the lowest floor, as applicable to the flood hazard area, is at or above the base flood elevation and securely anchored to an adequately anchored foundation system to resist floatation, collapse, and lateral movement. 
   .0201   All manufactured homes placed or substantially improved within Zones AH and AE on the FIRM on sites (a) outside of a manufactured home park or subdivision, (b) in a new manufactured home park or subdivision, (c) in an expansion to an existing manufactured home park or subdivision, or (d) in an existing manufactured home park or subdivision in which a manufactured home has incurred "substantial damage" as the result of a flood, shall be elevated on a permanent foundation such that the lowest floor, or bottom of the lowest horizontal member of the lowest floor,  of the manufactured home is elevated at least one foot above the base flood elevation and be securely anchored to an adequately anchored foundation system to resist flotation, collapse and lateral movement.
   .0202   In Zone A1-30, AH, and AE, all manufactured homes to be placed or substantially improved on sites in an existing manufactured home park or subdivision that are not subject to the provisions of 17.28.170.020, shall be elevated so that the lowest floor is at or above the base flood elevation, or the chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than 36 inches in height above grade and be securely anchored to an adequately anchored foundation system to resist floatation, collapse, and lateral movement.
   .030   No manufactured home shall be placed in a floodway, except in an existing manufactured home park or existing manufactured home subdivision;
   .040   Require that recreational vehicles placed on sites within Zone AH and AE on the FIRM either (i) be on the site for fewer than one hundred eighty consecutive days, (ii) be fully licensed, operational, registered, and ready for highway use, or (iii) meet the permit requirements in Section 17.28.100 and the elevation and anchoring requirements for "manufactured homes" in Section 17.28.170.020 above. A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions.
   .050   Adequate surface drainage and access for a hauler shall be provided. (Ord. 4138 § 1 (part); June 3, 1980:  Ord. 4879 §§ 15—19, 20 (part); December 1, 1987:  Ord. 5217 §§ 7, 8; May 7, 1991:  Ord. 6512 § 16; August 24, 2021.)