Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-150M - Manufactured homes › ALTERATIONS AND INSPECTIONS › Alteration Approval › Section 296-150M-0306 - What codes and requirements are applicable when altering a manufactured/mobile home?

Current through Register Vol. 24-14, July 15, 2024
Alterations to a manufactured/mobile home must be in
					 compliance with the Manufactured Home Construction and Safety Standards, 24
					 C.F.R. Part 3280, as adopted by the Secretary for the Department of Housing and
					 Urban Development (HUD) and the amendments to that federal standard adopted in
					 this WAC chapter. The department will accept the following provisions, which
					 supersede the applicable requirements in 24 C.F.R. Part 3280.
(1) Tested equivalent air condition/heat pump
				  components that have been tested and listed for use with a particular furnace
				  by a nationally recognized testing laboratory or air conditioners and heat
				  pumps that are rated in accordance with Air-Conditioning, Heating and
				  Refrigeration Institute (AHRI) standards. The blower motor of the furnace
				  and/or air handler shall be tested at the time of installation to verify and
				  document adequate cubic feet per minute of air flow as required by the
				  manufacturer. Documentation of the blower motor test (such as a start-up sheet)
				  is required to be provided on-site for the inspector at the time of
				  inspection.
(2) Water heaters that
				  are listed by a nationally recognized testing laboratory and installed per the
				  manufacturer's installation instructions.
Note:
For installation of electrical or gas furnaces and/or
							 water heater in pre-HUD homes, the requirement of 24 C.F.R. Part 3280.203 for
							 flame spread limitations is waived as long as the installation meets the
							 requirement of the installed appliance for distance from combustibles. This
							 does not apply when performing fire safety alterations for relocation as
							 required by state law.
(3) Pellet stoves for installation that have
				  been listed by a department approved nationally recognized testing laboratory.
				  For a current list of approved laboratories, contact any department field
				  office or the department at the address shown in WAC
				  296-150M-0020.
(4) All electrical alterations and additions
				  to the manufactured/mobile home shall comply with the current edition of the
				  National Electrical Code.
Electrical disconnects must be secured to a
					 manufactured/mobile structural member (not the skirting) and have a 30" x 30"
					 clearance for maintenance.
(5) The International Residential Code for
				  structural alterations.
Note:
The replacement of exterior siding is an alteration
							 and requires the approval of the department and an alteration insignia.
(6)
				  The use of corrugated stainless steel tubing (CSST) listed in accordance with
				  ANSI LC-1/CSA 6.26 standard for "Fuel gas piping systems using corrugated
				  stainless steel tubing" is allowed when installed according to the
				  manufacturer's installation instructions for mobile/manufactured
				  homes.
(7) Installation of gas room
				  heaters in bedrooms must:
(a) Have direct
				  vented (sealed combustion) and be listed as UL 307A for liquid fuel burning
				  heater or ANSI Z21.88 and ANSI Z21.86 for vented gas fireplaces.
(b) Have a smoke detector, listed to
				  Underwriters Laboratory (UL) 217. The smoke detector can either be hardwired or
				  battery powered (ten-year battery) and installed according to the
				  manufacturer's installation requirements.
(c) Have a carbon monoxide (CO) detector,
				  listed to UL 2034. The CO detector must be installed according to the
				  manufacturer's installation requirements.
(d) Have at least one means of
				  egress.