A. Skirting: All manufactured buildings installed in the city are required to be skirted with material of like kind and quality as the exterior of the manufactured home itself. The skirting shall completely cover the underside of the manufactured home.
B. Foundation and Tie Down Specifications: Foundations and tie downs shall meet or exceed the following specifications:
1. Piers And Footings: All piers and footings shall be spaced at a maximum of ten foot (10') intervals on both frame rails with end piers no farther than five feet (5') from end of mobile home; footings of solid concrete sixteen inches by sixteen inches by four inches (16" x 16" x 4"); piers of standards eight inches by eight inches by sixteen inches (8" x 8" x 16") concrete blocks, open or closed cells with open cells in a vertical position. Wood blocks used for leveling not exceeding a maximum of four inch (4") thickness extending the length and width of the mobile home is acceptable. Piers shall be double locked with blocks interlocked and capped with a filler of wood or concrete footing measuring a minimum twenty four inches by twenty four inches (24" x 24") in width by eighteen inches (18") in depth with steel reinforcing dowels. Piers shall be a minimum sixteen inches by sixteen inches (16" x 16") with blocks interlocked and laid in; mortar with steel reinforcing dowels in each of the block cells and tied into the footing. All block cells shall be filled with concrete.
C. Anchoring Installations:
1. Every ground anchor shall have specifications data showing the soil classifications for which it qualifies. Anchor selection shall be based on a determination of the soil classification at the depth at which the anchor will be installed. Ground anchors, including means for attaching ties, shall be located to comply with anchoring system instructions provided by the manufactured home manufacturer, or, if there are no instructions, in accordance with the requirements of this standard.
2. Ground anchors shall be designed and installed to transfer the anchoring loads to the ground. The load carrying portion of the ground anchors shall be installed to the full depth called for by the manufacturer’s installation directions and shall extend below the established frost line into undisturbed soil.
3. Manufactured ground anchors shall be listed by an approved testing agency and installed in accordance with the terms of their listing and the anchor manufacturer’s instructions, and shall include means of attachment of ties meeting the requirements of subsection B7 of this section, which includes ground anchor manufactured homes, particularly damage that can be caused by frost heave. Each ground anchor shall be marked with the manufacturer’s identification and listed model identification number which shall be visible after installation. Instructions shall accompany each listed ground anchor specifying the types of soil for which the anchor is suitable under the requirements of this section.
4. Each approved ground anchor, when installed, shall be capable of resisting an allowable working load at least equal to three thousand one hundred fifty (3,150) pounds at forty (40) to fifty degrees (50°) from vertical without displacing the ties end of the anchor more than four inches (4") horizontally. Anchors designed for connection of multiple ties shall be capable of resisting the combined workload and overload consistent with the intent expressed herein.
5. Anchoring Equipment: Anchoring equipment, when installed as a permanent installation, shall be capable of resisting all loads as specified within this standard. When the stabilizing system is designed by a registered professional engineer or architect, alternative designs may be used; provided, that the anchoring equipment to be used is capable of withstanding a fifty percent (50%) overload.
6. Resistance To Weather Deterioration: All anchoring equipment exposed to weathering shall have a resistance to weather deterioration at least equivalent to that provided by a coating of zinc on steel of not less than six hundred twenty five thousandths (0.625) ounce per square foot on each side of the surface coated, as determined by ASTM A90-69. Slit or cut edges of zinc coated steel strapping do not need to be zinc coated.
7. Permanency Of Connections: Anchoring systems shall be so installed as to be permanent. Anchoring equipment shall be designed to prevent self-disconnection with no hook ends used.
8. Tension Device Design: Tension devices, such as turnbuckles or yoke type fasteners, shall be ended with clevis or forged or welded eyes.
9. Ties, Materials And Installation: Steel strapping, cable, chain, or other approved materials shall be used for ties. All ties shall be fastened to ground anchors and drawn tight with turnbuckles or other adjustable tension devices or devices supplied with the ground anchor. Tie materials shall be capable of resisting an allowable working load of three thousand one hundred fifty (3,150) pounds with no more than two percent (2%) elongation and shall withstand a fifty percent (50%) overload (4,750 pounds). Ties shall comply with the weathering requirements of subsection B4 of this section. Ties shall connect the ground anchor and the main structure frame. Ties shall not connect to steel outrigger beams which fasten to and intersect the main structural frame unless specifically stated in the manufacturer’s installation instructions. Connection of cable ties to main frame members shall be five-eighths inch (5/8") drop forged closed eye bolts affixed to the frame member in an approved manner. Cable ends shall be secured with at least three (3) U-bolt type cable clamps with the “U” portion of the clamps installed on the short (dead) end of the cable to assure strength equal to that required by this section.
D. Permit Required: Manufactured buildings may be installed, blocked, and anchored only upon issuance of a permit by the building inspector. The permit application shall include the location where the manufactured home is to be placed and shall receive zoning approval prior to issuance. (1985 Code ch. 4 § 9-4; Ord. 340, 10-7-2019)