WAC 296-150M-0306   What codes are used when altering a manufactured/mobile home?  Alterations to a manufactured/mobile home must be in compliance with the Manufactured Home Construction and Safety Standards, 24 CFR 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 CFR Part 3280.

     (1) Tested equivalent air conditioning/heat pump components that have been tested and listed for use with a particular furnace by a nationally recognized testing laboratory.

     (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 furnaces and/or water heater in pre-HUD homes, the requirement of 24 CFR 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.

     (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) is allowed when installed according to the manufactured installations instructions for mobile/manufactured homes by the following CSST manufacturers:

     (a) Gastite;

     (b) TracPipe;

     (c) Pro-Flex.

     (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) Not be able to draw combustion air from the living space and must be designed so that it will become inoperative if any door, latch, or opening is not properly sealed.

     (c) Have a smoke detector, listed to UL 217. The smoke detector can either be hardwired or battery powered and installed according to the manufacturer's installation requirements.

     (d) Have a carbon dioxide (CO₂) detector, listed to UL 2034. The CO₂ detector must be installed according to the manufacturer's installation requirements.

     (e) Have at least one means of egress.



[Statutory Authority: Chapter 43.22 RCW. 08-12-041, § 296-150M-0306, filed 5/30/08, effective 6/30/08; 07-05-063, § 296-150M-0306, filed 2/20/07, effective 4/1/07. Statutory Authority: Chapter 43.22 RCW and 2005 c 399. 05-24-020, § 296-150M-0306, filed 11/29/05, effective 1/1/06. Statutory Authority: RCW 43.22.340, 43.22.350, 43.22.355, 43.22.360, 43.22.400, 43.22.432, 43.22.433, 43.22.434, 43.22.450, 43.22.480, and 43.22.485. 00-17-148, § 296-150M-0306, filed 8/22/00, effective 9/30/00. Statutory Authority: RCW 43.22.340 and 43.22.480. 99-13-010, § 296-150M-0306, filed 6/4/99, effective 7/5/99. Statutory Authority: Chapter 43.22 RCW. 98-14-078, § 296-150M-0306, filed 6/30/98, effective 7/31/98.]