N.M. Admin. Code § 14.12.5.10

Current through Register Vol. 35, No. 21, November 5, 2024

Section 14.12.5.10 - NON-PERMANENT FOUNDATIONS (NEW OR USED; PRE-OWNED OR RESOLD)

The following requirements apply to new, used, pre-owned or resold manufactured homes, unless otherwise indicated.

A. Ordinances of any political subdivision of New Mexico relating to installation of manufactured homes shall not be inconsistent with any rules, regulations, codes or standards adopted by the division pursuant to the Manufactured Housing Act, including the foundation systems.

B. Perimeter enclosements.

(1) All materials to be used for a perimeter enclosement must have prior approval by the division.

(2) Material shall be installed in accordance with the material manufacturer's recommended installation instructions or in accordance with the minimum standards adopted by the division.

(3) The manufactured home's perimeter enclosement must be self-venting, and no flammable objects may be stored under the manufactured home.

(4) An access or inspection panel shall be installed in the perimeter enclosement and shall be located so that utilities and blocking may be inspected.

(5) All vents and openings shall be installed to prevent entry of rodents and direct rainfall not to exceed 1/4 inch mesh.

(6) All perimeter enclosements in excess of thirty inches (30") in height must be supported vertically at least every four (4) feet or installed according to the enclosement material manufacturer's specifications.

C. Anchoring. When the manufacturer has issued required instructions for anchoring, the manufacturer's instructions shall be followed.

D. New homes. The manufacturer's installation manual shall be followed for all new homes installed within the state of New Mexico. The person(s) performing the work to install a new home shall be responsible to insure that all necessary installation permits have been obtained by the homeowner, customer or installer, to be determined in writing prior to the delivery of subject home.

E. Used, pre-owned and resales. The person(s) performing the work to install a used, preowned or resold manufactured home shall be responsible for: a) all installation permits; b) calling for inspections; and c) compliance with all locally adopted zoning, planning and floodplain ordinances and d) compliance with all minimum soil compaction criteria, slope and drainage requirements. The person(s) performing the work shall be responsible only for the work they perform. When available all units shall be installed in accordance with the manufacturer's installation manual. Requirements when the manufacturer's installation manual is not available:

(1) blocking: all piers and footings shall be installed in such a manner that the manufactured home shall be leveled;

(2) all marriage joints in multi-wide homes shall be installed to prevent air infiltration;

(3) all roofs and floor marriage joints shall be lag bolted no more than four (4') feet apart; beam support blocking must be provided.

F. Materials.

(1) Standard eight inch by eight inch by sixteen inch (8"X8"X16") hollow, concrete or concrete masonry unit (CMU), or other listed material may be used for block pier construction.

(2) Standard eight inch by four inch by sixteen inch (8"X4"X16") solid concrete or cinder blocks or other listed materials may be used for pier, top cap and footing construction.

G. Footings.

(1) Each pier shall have a footing beneath it of solid concrete or CMU or other listed material with a minimum sixteen inch by sixteen inch (16"X16") ground bearing surface four (4") inches thick.

(2) Two (2) eight inch by four inch by sixteen inch (8"X4"X16") solid blocks may be used for a footing provided they are placed together with seam between the two blocks running parallel with the frame of the manufactured home.

(3) Any concrete ribbon footings installed by the licensee shall be a minimum of six (6") inches thick by sixteen (16") inches wide and centered as closely as possible to the center of the frame members.

(4) Other listed materials which provide equivalent load bearing capacity and resistance to decay may be used, when they receive prior approval by the division.

H. Spacing.

(1) The maximum distance allowed between piers is eight (8') feet on center.

(2) Piers shall be placed within three (3') feet from each end of the manufactured home.

(3) Exceptions. If the wheel space of the manufactured home does not permit eight (8') foot blocking, additional support shall be provided at both ends of the wheel space.

I. Concrete masonry unit (CMU) piers, top caps and shims.

(1) CMU piers shall be positioned perpendicular to the frame of the manufactured home.

(2) Each CMU pier must have a minimum four (4") inch solid top cap or two (2") inch nominal wood cap which has the same perimeter dimension as the pier.

(3) A maximum of four and one-half (4-1/2") inches of wood are allowed on top of each CMU pier. Each layer of shims shall be driven from the opposite direction as the shim below it. Concrete masonry unit's (CMU) pier heights: when the footings, CMU piers and wood exceed forty-one (41") inches in height, the CMU piers must be constructed of double tiers of interlocking blocks. When the footings, CMU piers and wood exceed forty- eight (48") inches in height, the interlocking blocks shall be filled with concrete and reinforced with four (4) three-eighths (3/8") inch rebar. When the footings, CMU piers and wood exceed sixty (60") inches in height, the pier construction must be designed by a New Mexico licensed professional engineer and submitted to the division for approval.

J. Pre-fabricated piers.

(1) All piers shall be approved by the division prior to installation.

(2) The spacing of piers shall be the same as for block piers.

(3) One (1) listed, treated, sixteen inch by sixteen inch (16"X16") pad may be used with each pier as a footing.

(4) The maximum height that a pier jack extension shall be raised is two (2") inches.

(5) The maximum height for piers, including the footing and jack extension, is thirty-four (34") inches.

(6) The flanges on the top of the jack extension shall be alternated.

K. Other piers: all other piers shall be pre-approved by the division prior to their use or installation.

L. Multi-wide homes shall be supported within two (2) feet of each end and ten (10') feet on center (O.C), and or on each end of any opening exceeding four (4') feet along the marriage line.

M. Perimeter support blocking on used homes shall be supported on each side of all egress doorways and on each side of any opening four (4') feet or larger to allow for proper structural support.

N.M. Admin. Code § 14.12.5.10

14.12.5.10 NMAC - Rp, 14.12.2.56 NMAC, 12-01-10