Current through Register Vol. 35, No. 6, March 26, 2024
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 ¼ 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.
