(A) Type I manufactured homes. All HUD-code Type I manufactured home foundations shall be installed in conformance with the regulations in the One- and Two-Family Dwelling Code and with the manufacturer’s installation specifications.
(B) PL 360 Code homes. All PL 360 Code home foundations shall be installed in conformance with the regulations in the One- and Two-Family Dwelling Code and with the manufacturer’s installation specifications.
(C) Type II and III manufactured homes and mobile homes. All HUD-Code Type II and III manufactured home and all mobile home foundations shall be installed in conformance with the manufacturer’s installation specifications or with the regulations in the ANSI/NFPA 501a Installation Standards.
(D) Pier design. In addition to the above code requirements, the following minimum design standards shall apply to all manufactured and mobile homes.
(1) Piers and caps. Piers or load-bearing supports or devices shall be designed and constructed to evenly distribute the loads. Piers shall be securely attached to the frame of the home or extend at least six inches from the centerline of the frame member. Manufactured load-bearing supports or devices shall be approved for the use intended or piers shall be constructed as follows.
(a) When single eight-inch by eight- inch by 16-inch concrete blocks are used, they shall not exceed three high, with open cells vertically placed upon the footing and with the 16-inch dimension perpendicular to the I-beam frame, and then shall be covered with two inch by eight inch by 16-inch preservative-treated hardwood or solid concrete block caps.
(b) When four-high and five-high block piers are used, they shall be double-blocked with interlocking concrete blocks and they shall be covered with four-inch by eight-inch by 16-inch preservative-treated hardwood or solid concrete block caps.
(c) For piers extending more than 40 inches above finished grade level, they shall be double-blocked with interlocking concrete blocks, with No. 3 reinforcing steel in the four corners, poured solid with 2,500 psi concrete, and they shall be covered with four-inch by eight-inch by 16-inch preservative-treated hardwood or concrete caps.
(2) Plates and shims. The plate shall be a cushion of preservative-treated hardwood or other approved material not exceeding two inches in thickness. The preservative-treated hardwood shims, which cannot exceed one inch in thickness, shall be used to fill the gap between the top of the pier cap and the frame of the home. Two-inch or four-inch solid concrete blocks may be used to fill the remainder of any gap. Shims shall be fitted and driven tight between the plate and the main frame.
(Prior Code, § 151.22) (Ord. 1982-4, passed 4-6-1982) Penalty, see § 151.99