SPS 321.035(1)(a) (a) Except as provided under pars. (b) and (c), all entrances into common use areas.
SPS 321.035(1)(b) (b) At least 50% of the bedrooms.
SPS 321.035(1)(c)1.1. At least one full bathroom, including doors or openings to a sink, toilet and tub or shower. If this bathroom is accessible only through a bedroom, the bedroom door shall meet the minimum width requirements of this section.
SPS 321.035(1)(c)2. 2. If one or more full bathrooms are provided on the first floor, the bathroom meeting the requirements under this section shall be on the first floor.
SPS 321.035 Note Note: This section does not require a full bathroom on the first floor.
SPS 321.035(2) (2)Hallways.
SPS 321.035(2)(a)(a) Except as allowed under par. (b), the clear width of hallways shall be at least 36 inches.
SPS 321.035(2)(b) (b) The following are allowed to infringe on the required clear width of a hallway:
SPS 321.035(2)(b)1. 1. Door hardware and finish trim.
SPS 321.035(2)(b)2. 2. Handrails may infringe into the minimum width of a hallway up to 4½ inches on each side.
SPS 321.035(2)(b)3. 3. Heating registers may infringe into the minimum width of a hallway up to 4½ inches and no part of the register may be more than 38 inches above the floor.
SPS 321.035(2)(b)4. 4. Ducts, pipes, light fixtures, structural features, and corner treatments that are within 84 inches of the floor may infringe into the minimum width of a hallway by a maximum of 4½ inches on each side.
SPS 321.035(2)(b)5. 5. Unlimited infringements are allowed in a hallway more than 84 inches above the floor.
SPS 321.035(3) (3)Kitchens.
SPS 321.035(3)(a)(a) There shall be at least 30 inches of clearance between a wall, a permanently-installed kitchen island, permanently-installed kitchen cabinets and the following kitchen appliances, if provided:
SPS 321.035(3)(a)1. 1. A range, cook top or oven.
SPS 321.035(3)(a)2. 2. A sink, refrigerator or freezer.
SPS 321.035(3)(b) (b) Measurements shall be taken from the face of the wall, island, cabinet or appliance, ignoring knobs and handles.
SPS 321.035 Note Note: See ICC/ANSI A117.1 chapter 10 for more guidelines relating to doors and accessible routes. Under that standard, doors must be at least 80-inches in height and provide a minimum net clear opening of 31¾-inches in width in order to provide accessibility for people with disabilities.
SPS 321.035 History History: CR 08-043: cr. Register March 2009 No. 639, eff. 4-1-09.
SPS 321.04 SPS 321.04Stairways and elevated areas.
SPS 321.04(1)(1)Scope.
SPS 321.04(1)(a)(a) General. Except as provided under par. (b), the following stairways shall conform to the requirements of this section.
SPS 321.04(1)(a)1. 1. Every interior and exterior stairway attached to, or supported by any part of the structure covered under this code.
SPS 321.04(1)(a)2. 2. Tub access stairs, unless they are an integral part of an approved plumbing product.
SPS 321.04(1)(b) (b) Exceptions. The following stairways are not required to comply with the requirements of this section:
SPS 321.04(1)(b)1. 1. Stairways leading to non-habitable attics or crawl spaces.
SPS 321.04(1)(b)2. 2. Non-required stairways connecting the basement directly to the exterior of the structure without communicating with any other part of the structure.
SPS 321.04(2) (2)Details.
SPS 321.04(2)(a)(a) Width.
SPS 321.04(2)(a)1.1. Except for spiral staircases under subd. 2., stairways shall measure at least 36 inches in width. Handrails and associated trim may project a maximum of 4.5 inches into the required width at each side of the stairway. The minimum clear width at and below the handrail, including at treads and landings, may not be less than 31.5 inches where a handrail is installed on one side, and 27 inches where handrails are provided on both sides.
SPS 321.04(2)(a)2. 2. Spiral staircases shall be at least 26 inches wide measured from the outer edge of the supporting column to the inner edge of the handrail.
SPS 321.04(2)(b) (b) Riser height.
SPS 321.04(2)(b)1.a.a. Except for spiral staircases under subd. 2., risers may not exceed 8 inches in height measured vertically from tread to tread.
SPS 321.04(2)(b)1.b. b. At the top and bottom of a flight, measurement shall be taken from the top of the nosing to the finished floor surface unless the finished surface is carpeting, in which case measurement shall be made to the hard surface below the carpeting.
SPS 321.04(2)(b)2. 2. Risers in spiral staircases may not exceed 9.5 inches in height measured vertically from tread to tread.
SPS 321.04(2)(c) (c) Tread depth.
SPS 321.04(2)(c)1.1. `Rectangular treads.' Rectangular treads shall have minimum tread depth of 9 inches measured horizontally from nosing to nosing.
SPS 321.04(2)(c)2. 2. `Spiral staircase treads.' Spiral staircase treads shall have a minimum tread depth of 7 inches from nosing to nosing measured at a point 12 inches from the outer edge of the center column.
SPS 321.04(2)(c)3. 3. `Winder treads in series.' Two or more winder treads may be placed immediately adjacent to each other anywhere in a stairway provided both of the following conditions are met:
SPS 321.04(2)(c)3.a. a. The winder treads shall have a minimum tread depth of 7 inches measured at a point 12 inches from the narrow end of the tread.
SPS 321.04(2)(c)3.b. b. The depth of the immediately adjoining winder treads shall be equal at a point 12 inches from the narrow end of the tread or inside face of spindles or balusters.
SPS 321.04(2)(c)3.c. c. Winder treads may not be used on a straight stairway.
SPS 321.04(2)(c)4. 4. `Individual winder treads.'
SPS 321.04(2)(c)4.a.a. An individual winder tread may be placed between rectangular treads or at the end of a flight of rectangular treads provided the tread depth is at least 9 inches, when measured at a distance of 12 inches from the narrow end of the tread or from the inside face of the wall.
SPS 321.04(2)(c)4.b. b. There may be more than one individual winder tread in a stairway.
SPS 321.04(2)(c)4.c. c. Winder treads may not be used on a straight stairway.
SPS 321.04(2)(d) (d) Headroom.
SPS 321.04(2)(d)1.1. Stairways shall be provided with a minimum headroom clearance of 76 inches measured vertically from a line parallel to the nosing of the treads to the ceiling, soffit or any overhead obstruction directly above that line.
SPS 321.04(2)(d)2. 2. The headroom clearance shall be maintained over an intermediate landing.
SPS 321.04(2)(d)3. 3. The headroom clearance shall be maintained over a landing that is at the top or bottom of a stairway for a minimum distance of 36 inches in the direction of travel of the stairway.
SPS 321.04(2)(e) (e) Uniformity.
SPS 321.04(2)(e)1.1. Within a stairway flight, the greatest tread depth may not exceed the smallest tread depth by more than 3/8 inch and the greatest riser height may not exceed the smallest riser height by more than 3/8 inch.
SPS 321.04(2)(e)2. 2. The allowed variation in uniformity under subd. 1. may not be used to exceed the maximum riser height under par. (b) or to decrease the minimum tread depth under par. (c).
SPS 321.04(2)(f) (f) Open risers. Stairways with open risers shall be constructed to prevent the through-passage of a sphere with a diameter of 4 inches or larger between any 2 adjacent treads.
SPS 321.04(2)(g) (g) Walking surface. The walking surface of stair treads and landings shall be a planar surface that is free of lips or protrusions that could present a tripping hazard.
SPS 321.04(3) (3)Handrails and guards.
SPS 321.04(3)(a)(a) General.
SPS 321.04(3)(a)1.1. A flight of stairs with more than 3 risers shall be provided with at least one handrail for the full length of the flight.
SPS 321.04(3)(a)2. 2. Guards shall be provided on all open sides of stairs consisting of more than 3 risers and on all open sides of areas that are elevated more than 24 inches above the floor or exterior grade.
SPS 321.04 Note Note: A handrail provided at 30 to 38 inches above the tread nosing meets the height requirement for a guard on a stairway.
SPS 321.04(3)(a)3.a.a. Except as provided in subd. 3. b., guards shall be constructed to prevent the through-passage of a sphere with a diameter of 4 3/8 inches, when applying a force of 4 pounds.
SPS 321.04(3)(a)3.b. b. The triangular area formed by the tread, riser and bottom rail shall have an opening size that prevents the through-passage of a sphere with a diameter of 6 inches, when applying a force of 4 pounds.
SPS 321.04(3)(a)3.c. c. Rope, cable, or similar materials used in guard infill shall be strung with maximum openings of 3 1/2 inches with vertical supports a maximum of 4 feet apart.
SPS 321.04 Note Note: In some cases, the vertical supports could be simple cable stays that offer vertical support to the rope or cable span. Structural posts must be supplied to provide the rail with the minimum 200 pound load resistance, as well as to resist the tensile loads exerted by the tightened rope or cable.
SPS 321.04(3)(a)4.a.a. Handrails and guards shall be designed and constructed to withstand a 200 pound load applied in any direction.
SPS 321.04(3)(a)4.b. b. Handrail or guard infill components, balusters and panel fillers shall withstand a horizontally applied perpendicular load of 50 pounds on any one-foot-square area.
SPS 321.04(3)(a)4.c. c. Glazing used in handrail or guard assemblies shall be safety glazing.
SPS 321.04(3)(a)5. 5. Exterior handrails and guards shall be constructed of metal, decay resistant or pressure-treated wood, or shall be protected from the weather.
SPS 321.04(3)(b) (b) Handrails.
SPS 321.04(3)(b)1.1. `Height.'
SPS 321.04(3)(b)1.a.a. Handrails shall be located at least 30 inches, but no more than 38 inches above the nosing of the treads, except as provided in subds. 1. b. to d. Measurement shall be taken from the hard structural surface beneath any finish material to the top of the rail. Variations in uniformity are allowed only when a rail contacts a wall or newel post or where a turnout or volute is provided at the bottom tread.
SPS 321.04(3)(b)1.b. b. A volute, turnout, or starting easing that does not comply with subd. 1. a. may extend over the lowest tread.
SPS 321.04(3)(b)1.c. c. Transition fittings on handrails may extend above the 38-inch height limit.
SPS 321.04(3)(b)1.d. d. Where handrail fittings or bendings are used to provide a continuous transition between flights, or at winder treads, or from a handrail to a guard, or at the start of a flight, the height at the fittings or bendings may exceed 38 inches.
SPS 321.04(3)(b)2. 2. `Clearance.' The clearance between a handrail and the wall surface shall be at least 1 1/2 inches.
SPS 321.04(3)(b)3. 3. `Winders.'
SPS 321.04(3)(b)3.a.a. Except as provided under subd. 3. b., the required handrail on winder stairs shall be placed on the side where the treads are wider.
SPS 321.04(3)(b)3.b. b. Where all winder treads in a flight have a depth of at least 9 inches from nosing to nosing measured at a point 12 inches from the narrow end of the tread, the required handrail may be located on either side of the stairway.
SPS 321.04(3)(b)4. 4. `Projection.' Handrails and associated trim may project into the required width of stairs and landings a maximum of 4 1/2 inches on each side.
SPS 321.04(3)(b)5. 5. `Size and configuration.' Handrails shall be symmetrical about the vertical centerline to allow for equal wraparound of the thumb and fingers.
SPS 321.04(3)(b)5.a. a. Handrails with a round or truncated round cross sectional gripping surface shall have a maximum whole diameter of 2 inches.
SPS 321.04(3)(b)5.b. b. Handrails with a rectangular cross sectional gripping surface shall have a maximum perimeter of 6 1/4 inches with a maximum cross sectional dimension of 2 7/8 inches.
SPS 321.04(3)(b)5.c. c. Handrails with other cross sections shall have a maximum cross sectional dimension of the gripping surface of 2 7/8 inches with a maximum linear gripping surface measurement of 6 1/4 inches and a minimum linear gripping surface of 4 inches.
SPS 321.04 Note Note: See ch. SPS 325 Appendix A for further information on handrail measurement.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.