Washington Administrative Code

(1) You must contact us, and we will let you know where your request for inspection should be submitted. Our address is noted in the definition of department.(2) We must receive in-state inspection requests at least seven calendar days prior to the date that you want the inspecti…

If your commercial coach passes inspection and you have met the other requirements of this chapter, we will attach the insignia.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 296-150C-0520, filed 10/23/96,…

(1) If you ask us to inspect a commercial coach within Washington state but you are not prepared when we arrive, you must pay the inspection fee and travel. (See WAC 296-150C-3000.)(2) If you ask us to inspect a commercial coach outside Washington state but you are not prepared w…

The local enforcement agency (city or county) must approve the installation.Note:The local enforcement agency may not open the concealed construction of a commercial coach to inspect it if our insignia is attached.Note:Alterations to commercial coaches must be inspected and appro…

Commercial coaches must be completed at the manufacturing location before an insignia is attached.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 296-150C-0550, filed 10/23/96, effective 11/25/96.]

(1) If your commercial coach alteration does not pass our inspection, you will receive a notice of noncompliance. The notice of noncompliance explains what items must be corrected.(2) You have twenty days after receiving the notice of noncompliance to send us a written response t…

All used commercial coaches that are to be installed on a building site or used in Washington state must have an insignia of approval from us. (See exceptions WAC 296-150C-0200 (1)(a)(b).)[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and …

We consider used commercial coaches as new units for purposes of insignia approval. To obtain insignia, you must:(1) Have the design plan approved (see WAC 296-150C-0300 through 296-150C-0480);(2) Purchase insignia (see WAC 296-150C-0200 through 296-150C-0230); and(3) Pass a unit…

(1) If you are manufacturing commercial coaches at more than one location, approved design plans must be available at each manufacturing location.(2) You must send us the following information for each manufacturing location:(a) Company name;(b) Mailing and physical address; and(…

(1) If you are moving you must notify us in writing prior to a change of business name or address.(2) Your notice must include the change of name and address.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § …

(1) When a manufacturer changes ownership, the new owner must notify us in writing immediately.(2) A new owner may continue to manufacture the units according to a prior approved design plan if the prior owner provides written releases of the design plan.[Statutory Authority: RCW…

(1) All design, construction, and installations of commercial coaches must conform with the following codes and the requirements of this chapter:(a) The latest adopted version of the Washington State Ventilation and Indoor Air Quality Code, as adopted by chapter 51-13 WAC;(b) The…

In addition to the requirements in this chapter, the department of health has rules regulating primary and secondary schools in chapter 246-366 WAC. One of those requirements in WAC 246-366-050(2) is that "Instructional areas shall have a minimum average ceiling height of 8 feet.…

The following definitions and the definitions in each of the state codes adopted in WAC 296-150C-0800 apply to commercial coach construction."Anchoring system" is the means used to secure a commercial coach to ground anchors or to other approved fastening devices. It may include …

Each commercial coach must be designed and constructed as a completely integrated structure capable of sustaining the design-load requirements of this chapter. It shall be capable of:(1) Transmitting these loads to stabilizing devices without causing unsafe deformation or abnorma…

Roof framing must be securely fastened to wall framing, walls to floor structure, and floor structure to chassis. This must secure and maintain continuity between the floor and chassis and resist wind uplift, overturning, and sliding as imposed by design loads.[Statutory Authorit…

(1) The design live loads must be established according to this chapter and must be considered to be uniformly distributed.(2) The roof live load must not be considered as acting simultaneously with the wind load. The roof and the floor live loads must not be considered as resist…

All roofs must be designed to sustain loads as follows:(1) Dead loads plus a minimum unit live load of 30 lb/ft2 (2 months load duration); and(2) A vertical net uplift load of 9 lb/ft2 (1 day load duration).[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]43…

The roof of a commercial coach must be designed for the loads to which it will be subjected in areas where snow records or experience indicate snow loads in excess of 30 lb/ft2.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480…

The commercial coach and each wind resisting part must be designed for the following wind loads:Horizontal15 lb/ft2(1 day load duration)Vertical upward9 lb/ft2(1 day load duration)Vertical downward(see WAC 296-150C-0850 Roof loads)A commercial coach must be designed for higher wi…

(1) Each commercial coach must have provisions for support and anchoring systems that, when properly designed and installed, will resist overturning and lateral movement of the commercial coach as imposed by the respective design loads. Support and anchoring systems can be instal…

Interior walls and partitions must be:(1) Constructed with structural capacity adequate for the intended purpose; and(2) Capable of resisting a horizontal load of at least five pounds per square foot without exceeding the deflections specified in WAC 296-150C-0920.[Statutory Auth…

See use or occupancy of the 2003 edition of The International Building Code for group occupancy loads.[Statutory Authority: Chapter 43.22 RCW and 2003 c 291. WSR 05-01-102, § 296-150C-0910, filed 12/14/04, effective 2/1/05. Statutory Authority: RCW 43.22.340, 43.22.350, 43.22.355…

When a structural assembly is subjected to total design live loads, the deflection for structural framing members must not exceed the following:L = The clear span between supports or two times the length of a cantilever.FloorL/240Roof and ceilingL/180Headers, beams, girdersL/180W…

(1) A structural assembly or subassembly tested for qualification must sustain the design dead load plus the superimposed design live loads (see WAC 296-150C-0840) equal to 1.75 times the required live loads for a period of twelve hours without failure of the assembly or subassem…

Roof framing must be securely fastened to wall framing, walls to floor structure, and floor structure to chassis to secure and maintain continuity between the floor and chassis and to resist wind uplift, overturning, and sliding as imposed by design loads.[Statutory Authority: RC…

(1)(a) The roof covering must be securely fastened in an approved manner to the supporting roof construction and must provide weather protection for the commercial coach and the occupants. The roof covering must be installed according to the manufacturer's instructions and approv…

(1) The construction of roof trusses must be approved by a professional engineer. Roof trusses may be produced by one of the following methods:(a) Use of graded materials when an approved testing agency certifies truss construction and load requirements are met; the testing agenc…

(1) All roofs must be framed and tied into the framework and supporting walls to form an integral part of the commercial coach.(2) All trusses must be laterally braced.(3) All roof decks must be designed and built with sufficient slope or camber to assure adequate drainage, or mu…

All exterior wall openings or penetrations into the commercial coach around piping, ducts, plenums, or vents must be sealed with moisture-resistant material.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 2…

(1) Cutting and notching. In exterior walls and bearing partitions, any wood stud may be cut or notched to a depth not exceeding twenty-five percent of its width. Cutting or notching of studs to a depth not greater than forty percent of the width of the stud is permitted in nonbe…

Walls must be of sufficient strength to withstand the load requirements of this chapter. The connections between the bearing walls, floor, and roof framework members must be fabricated to provide support for the material used to enclose the commercial coach and to provide for the…

(1) Fire-blocking must be provided in commercial coaches to cut off all concealed draft openings in all stud walls and partitions, including furred spaces at the ceiling and floor levels and at ten foot intervals both vertical and horizontal.(2) Fire-blocking must be provided aro…

(1) Wood floors or subfloors in kitchens, bathrooms (including toilet compartments), laundry rooms, water heater compartments, and any other areas subject to excessive moisture must be moisture resistant; or they must be made moisture resistant by sealing or by an overlay of nona…

(1) Notches on the ends of joists must not exceed one-fourth the joist depth, unless substantiated by engineering design or approved tests.(2) Holes bored in joists must not be within two inches of the top or bottom of the joist, and the diameter of any such hole must not exceed …

Roof framing must be securely fastened to wall framing, walls to floor structure, and floor structure to chassis to secure and maintain continuity between these elements to resist wind uplift, overturning and sliding imposed by the design loads.[Statutory Authority: RCW 43.22.340…

The closure material must meet ASTM D-781 standard or equal and be installed as follows:(1) Fibrous material (with or without patches) must meet or exceed the level of 48 inch-pounds of puncture resistance as tested.(2) The material must be installed according to installation ins…

Each commercial coach chassis must be designed and constructed to be capable of:(1) Effectively sustaining the design loads consisting of the dead load plus five PSF load on the floor and the superimposed dynamic load resulting from highway movement, in no case shall the dynamic …

The manufacturer's equipment and installation specifications must be followed. Other approved standards are acceptable when:•Installed according to the manufacturer's installation instructions; and•Approved by a listing or testing agency.[Statutory Authority: RCW 43.22.340, [43.2…

(1) The interior finish of all walls and partitions must have a flame-spread rating not exceeding two hundred except as otherwise specified in this section. The flame-spread limitation does not apply to:(a) Molding, trim, windows, doors, or series of doors four feet wide or less;…

(1) The exposed wall adjacent to the cooking range, must be fifty flame-spread or less, such as 5/16 inch gypsum board or material having equivalent fire protective properties.(2) All openings for pipes and vents in furnace and water heater spaces shall be tight-fitted or fire-st…

The bottom and sides of combustible kitchen cabinets over cooking ranges or tops including a space of six inches from the edge of the burners must be protected with at least materials rated at twenty-five or less flame-spread covered with at least twenty-six gauge sheet metal (.0…

Insulation standards for commercial coaches must comply with the Washington State Energy Code, unless another state law supersedes the Washington State Energy Code.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-1…

(1) Every habitable room must have a minimum ceiling height of not less than seven feet.(2) No habitable room, except a kitchen, must be less than five feet in any clear horizontal dimension.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 a…

(1) Hallways in structures required to meet accessibility standards must have a minimum horizontal dimension that conforms to accessibility standards set by the International Building Code, current edition, standards set in the accessibility standard in WAC 296-150C-0800 (1)(d).(…

When applicable, a commercial coach must meet the accessibility standards set by the Washington State Building Code in RCW 19.27.030(5).[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 296-150C-1160, filed 1…

(1) Habitable rooms must be provided with exterior windows or doors having a total glazed area of at least ten percent of the floor area, or they must have artificial light.(2) An area equal to a minimum of five percent of the floor area must be available for unobstructed ventila…

The provisions of this section shall apply to the installation of glass or glazed openings, including hazardous locations.(1) Standards. Standards for material shall meet International Building Code Section 2406.1.(2) Identification. Flat glass shall bear the manufacturer's label…

When applicable, a commercial coach must comply with International Building Code, Chapter 11 Accessibility and with the following requirements:(1) Commercial coaches must have at least two exterior doors that are remote from each other. Remote means that in:(a) Single-wide units …

If a commercial coach interior door, such as a bathroom door, has a privacy lock, the lock must contain an emergency release. The emergency release must be on the outside to permit entry when the door is locked from the inside.[Statutory Authority: RCW 43.22.340, [43.22.]355, [43…