SPS 321.18(2) (2)Concrete foundation walls.
SPS 321.18(2)(a)(a) General structural requirements. Except as provided in par. (b), unless designed through structural analysis, the minimum thickness of concrete foundation walls shall be determined from Table 321.18-B, but in no case shall the thickness of the foundation wall be less than the thickness of the wall it supports.
SPS 321.18(2)(b) (b) Equalized loading. A 6-inch nominal wall thickness may be used provided the fill on one side of the wall is within 12 inches vertically of the fill on the other side of the wall.
SPS 321.18 Note Note: See s. SPS 321.15 (1) (c) for trench footing requirements. - See PDF for table PDF
SPS 321.18(3) (3)Masonry foundation walls.
SPS 321.18(3)(a)(a) Dampproofing.
SPS 321.18(3)(a)1.1. Except as allowed under subd. 3., masonry block foundation walls shall be coated with a layer of minimum 3/ 8-inch thick type M or S portland cement mortar parging on the exterior of the wall from footing to finished grade.
SPS 321.18(3)(a)2. 2. Masonry foundation walls shall be damp-proofed by applying to the exterior surface of the portland cement parging from footing to finished grade, a continuous coating of one of the following:
SPS 321.18(3)(a)2.a. a. A bituminous coating applied in accordance with the manufacturer's instructions.
SPS 321.18(3)(a)2.b. b. Acrylic-modified cement applied at a minimum rate of 3 pounds per square yard.
SPS 321.18(3)(a)2.c. c. A layer of minimum 1/8-inch thick structural surface bonding material labeled as complying with ASTM C887.
SPS 321.18 Note Note: The ASTM C887 standard is entitled, "Standard Specification for Packaged, Dry, Combined Materials for Surface Bonding Mortar."
SPS 321.18(3)(a)2.d. d. A waterproofing treatment applied in accordance with the manufacturer's instructions.
SPS 321.18(3)(a)3.a.a. Parging of masonry block foundation walls is not required where a dampproofing material is sufficiently flexible to be listed or designed for direct application to masonry block.
SPS 321.18(3)(a)3.b. b. Parging of masonry block foundation walls is not required where a layer of minimum ¼-inch thick structural surface bonding material labeled as complying with ASTM C887 is used for dampproofing.
SPS 321.18(3)(b) (b) Structural requirements. Unless designed through structural analysis, the masonry foundation walls shall be constructed in accordance with ACI 530.1 and the following requirements:
SPS 321.18(3)(b)1. 1. The minimum thickness of unreinforced masonry foundation walls shall be determined by Table 321.18-C, but in no case shall the thickness be less than the thickness of the wall it supports.
SPS 321.18(3)(b)2. 2. Reinforced masonry walls shall be reinforced in accordance with the requirements of Tables 321.18-D, 321.18-E or 321.18-F. Vertical reinforcement shall be provided on each side of any opening and at intervals indicated in the appropriate table. - See PDF for table PDF - See PDF for table PDF - See PDF for table PDF - See PDF for table PDF
SPS 321.18(3)(b)3. 3. Vertical reinforcement shall have a minimum yield strength of 60,000 psi.
SPS 321.18(3)(b)4. 4. Solid-grouted hollow units or cores containing vertical reinforcement shall be filled with masonry grout that complies with ASTM C 476.
SPS 321.18(3)(b)5. 5. In lieu of the reinforcement provisions of Tables 321.18-D, 321.18-E and 321.18-F, alternative reinforcing bar size and spacing having an equivalent cross-sectional area or reinforcement per linear foot of wall is permitted, provided the spacing of the reinforcement does not exceed 72 inches and reinforcing bar size does not exceed No. 11.
SPS 321.18(3)(b)6. 6. The depth below grade, wall height and reinforcement spacing may exceed the maximum values indicated in Tables 321.18-D, 321.18-E and 321.18-F only if the design is based on structural analysis.
SPS 321.18(4) (4)Wood foundations. Wood foundations shall be designed and constructed in accordance with the standard adopted in Table 320.24-2.
SPS 321.18 Note Note: The department will accept Permanent Wood Foundations Design and Construction Guide published by the Southern Forest Products Association through the Southern Pine Council, as complying with this standard. The Design and Construction Guide requires a 3.5 inch thick floor slab if a poured concrete floor slab is used.
SPS 321.18 History History: Cr. Register, November, 1979, No. 287, eff. 6-1-80; am. (3) (intro), Register, February, 1985, No. 350, eff. 3-1-85; cr. (2) (c) to (e), r. and recr. Tables C and D, r. (3) (a) 2., renum. (3) (a) 1. to be (a), Register, January, 1989, No. 397, eff. 2-1-89; am. (intro.), (2) (b), (3) (b) and Table 21.18-D, cr. Table 21.18, r. (2) (c), renum. (2) (d) and (e) to be (2) (c) and (d), Register, March, 1992, No. 435, eff. 4-1-92; renum. (1) to (3) to be (2) to (4), and am. (3) (b), (4) (intro.) and (b), Table 21.18-A, r. (intro.) and Table 21.18, cr. (1), (3) (e), Register, November, 1995, No. 479, eff. 12-1-95; am (2), Register, January, 1999, No. 517, eff. 2-1-99; r. and recr. (1) (b), (3), Tables 21.18-C and D, am. (2) (a), r. Table 21.18-B, renum. Table 21.18-A to be Table 21.18-B and cr. (1) (c), (d), Tables 21.18-A, E and F, Register March 2001 No. 543, eff. 4-1-01; CR 02-077: r. (1) (c) 1., renum. (1) (d) to be (1) (e), cr. (1) (d), am. (4) (intro.), (b) and Tables 21.18-A, C and F Register May 2003 No. 569, eff. 8-1-03; CR 08-043: am. (1) (d) 2. b. and Tables 21.18-C to F, cr. (2) (a) (title) and (b) (title), r. and recr. (3) (a) and (4) Register March 2009 No. 639, eff. 4-1-09; correction in (1) (e), (2) (a), (3) (b) 1., 2., 5., 6., (4), Table 321.18-C to -F made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
subch. VI of ch. SPS 321 Subchapter VI — Floors
SPS 321.19 SPS 321.19 Floor design. Floors shall support all dead loads plus the minimum unit live loads as set forth in s. SPS 321.02. The live loads shall be applied to act vertically and uniformly to each square foot of horizontal floor area. Basements shall be provided with wood or concrete or similar type floors that comply with s. SPS 321.20 or 321.205.
SPS 321.19 History History: Cr. Register, November, 1979, No. 287, eff. 6-1-80; r. and recr., Register, March, 1992, No. 435, eff. 4-1-92; correction made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
SPS 321.20 SPS 321.20 Concrete floors.
SPS 321.20(1)(1) When concrete floors are provided, the thickness of the concrete shall measure at least 3 inches.
SPS 321.20(2) (2) When a concrete floor is placed in clay soils, a 4-inch thick base course shall be placed in the subgrade consisting of clean graded sand, gravel or crushed stone.
SPS 321.20(3) (3) When a concrete floor is placed on sand or gravel soils, the base course may be omitted unless drain tile is installed. If drain tile is installed, the requirements of s. SPS 321.17 shall be met.
SPS 321.20 History History: Cr. Register, November, 1979, No. 287, eff. 6-1-80; am. Register, January, 1989, No. 397, eff. 2-1-89; r. and recr. Register, January, 1999, No. 517, eff. 2-1-99; correction in (3) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
SPS 321.203 SPS 321.203 Garage floors.
SPS 321.203(1)(1) Materials. Garage floors shall be constructed of concrete or other noncombustible materials which are impermeable to petroleum products. Slab-on-grade concrete garage floors shall be at least 4 inches thick and placed over at least 4 inches of granular fill.
SPS 321.203 Note Note: It is not the intent of sub. (1) to require a concrete floor to be sealed to make it completely impermeable.
SPS 321.203(2) (2)Configuration. The floor shall be sloped such that water is removed in accordance with one of the following:
SPS 321.203(2)(a) (a) Water drains toward the overhead door or to exterior grade such that no damage will be caused to any structural member or wall covering of the garage or the dwelling.
SPS 321.203(2)(b) (b) Water drains into an interior floor drain that complies with the requirements of ch. SPS 382.
SPS 321.203 Note Note: See s. SPS 382.34 for floor drain requirements.
SPS 321.203 History History: Cr. Register, November, 1995, No. 479, eff. 12-1-95; CR 02-077: r. and recr. (2) Register May 2003 No. 569, eff. 8-1-03; correction in (2) (b) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
SPS 321.205 SPS 321.205 Wood floors in contact with the ground. Wood floors in contact with the ground shall comply with the requirements under s. SPS 321.18 (4).
SPS 321.205 History History: Cr. Register, January, 1989, No. 397, eff. 2-1-89; am. Register, January, 1999, No. 517, eff. 2-1-99; correction made under s. 13.93 (2m) (b) 7., Stats., Register, March, 2001, No. 543; CR 02-077: r. and recr. Register May 2003 No. 569, eff. 8-1-03; correction made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.
SPS 321.21 SPS 321.21 Precast concrete floors. Precast concrete floors shall be designed through structural analysis, or load tables furnished by the precast product fabricator may be used, provided the load tables were developed using structural analysis or load testing.
SPS 321.21 History History: Cr. Register, November, 1979, No. 287, eff. 6-1-80; r. and recr. Register, March, 1992, No. 435, eff. 4-1-92.
SPS 321.22 SPS 321.22 Wood frame floors. Unless designed through structural analysis, wood frame floors shall comply with the following requirements:
SPS 321.22(1) (1)Floor joists.
SPS 321.22(1)(a)(a) General.
SPS 321.22(1)(a)1.1. Floor joists shall comply with the structural requirements and live load determination under s. SPS 321.02.
SPS 321.22 Note Note: See Appendix for design information.
SPS 321.22(1)(a)2. 2. Where the joists of a floor system are parallel to, and located between bearing walls above and below, the joists shall be doubled.
SPS 321.22(1)(b) (b) Floor joists on concrete walls. Where a sill plate is provided for floor joists on poured concrete, the sill plates shall be fastened to the foundation.
SPS 321.22 Note Note: Section SPS 321.18 (1) (d) requires the floor joists to also be fastened to the sill plate.
SPS 321.22(1)(c) (c) Floor joists on masonry walls with a solid top course. Where a sill plate is provided for floor joists on solid block top course masonry, the sill plate shall be fastened to the foundation.
SPS 321.22(1)(d) (d) Floor joists on masonry walls with open top course.
SPS 321.22(1)(d)1.1. Where the masonry wall has an open top course, a sill plate at least as wide as the foundation wall shall be fastened to the foundation.
SPS 321.22(1)(d)2. 2. Where anchor bolts are used on masonry walls with an open top course, the minimum width of an individual piece making up the sill plate shall be at least 5.5 inches.
SPS 321.22 Note Note: A sill plate can be made of multiple pieces to achieve the full width.
SPS 321.22(2) (2)Floor trusses. Metal plate connected wood floor trusses shall be designed in accordance with the Design Specifications for Metal Plate Connected Parallel Chord Wood Trusses and the National Design Specification for Wood Construction. Truss members shall not be cut, bored or notched.
SPS 321.22(3) (3)Girders and beams.
SPS 321.22(3)(a)(a) Girders and beams shall be selected from Table 321.22-A1 or Table 321.22-A2 or shall be designed through structural analysis.
SPS 321.22(3)(b) (b) Wood girders and beams shall be fitted at the post or column. Adjoining ends shall be fastened to each other to transfer horizontal loads across the joint. Beams shall also be fastened to the posts with framing anchors, angle clips, or equivalent.
SPS 321.22(3)(c) (c) Where intermediate beams are used, they shall rest on top of the girders; or shall be supported by ledgers or blocks fastened to the sides of the girders; or they may be supported by approved metal hangers into which the ends of the beams shall be fitted.
SPS 321.22(3)(d) (d) Lateral restraint for all wood beams shall be provided at all columns using a saddle or other approved connection where the beam meets one of the following conditions:
SPS 321.22(3)(d)1. 1. The beam is not restrained at both ends.
SPS 321.22(3)(d)2. 2. The beam is more than 11.25 inches deep using actual measurement.
SPS 321.22 Note Note: A saddle supports the beam on the bottom and allows for the through-connection of fasteners into the side of the beam.
SPS 321.22(4) (4)Bearing and end configuration.
SPS 321.22(4)(a)(a) Sawn lumber.
SPS 321.22(4)(a)1.1. `Joists.' Wood joists made of sawn lumber shall meet the following bearing requirements:
SPS 321.22(4)(a)1.a. a. Wood joists supported on wood or metal shall have a bearing surface of at least 1½-inches measured from the end of the joist.
SPS 321.22(4)(a)1.b. b. Wood joists supported on masonry or concrete shall have a bearing surface of at least 3 inches measured from the end of the joist.
SPS 321.22(4)(a)1.c. c. The tail end of a floor joist may not extend past the edge of a beam by more than the depth of the floor joist.
SPS 321.22(4)(a)1.d. d. Wood floor joists with ends that intersect over a beam shall have the ends overlap at least 3 inches and be securely fastened together with at least two 12d common nails or the ends shall be butt-jointed or face-jointed and fastened with ties, straps, plates or solid blocking.
SPS 321.22(4)(a)2. 2. `Beams and girders.' Beams and girders made of sawn lumber shall have a bearing surface on their supports of at least 3 inches parallel to the beam or girder and be at least as wide as the beam or girder.
SPS 321.22(4)(b) (b) Engineered wood products. Bearing surface for engineered wood products shall be in accordance with the manufacturer's instructions provided those instructions were developed through structural analysis or product testing and are applicable to the configuration.
SPS 321.22(5) (5)Notching and boring. Notching and boring of beams or girders is prohibited unless determined through structural analysis.
SPS 321.22(5)(a) (a) Notching of floor joists.
SPS 321.22(5)(a)1.1. Notches located in the top or bottom of floor joists shall not have a depth exceeding 1 /6 the depth of the joist, shall not have a length exceeding 1/3 the joist depth nor be located in the middle 1/3 of the span of the joist.
SPS 321.22(5)(a)2. 2. Where floor joists are notched on the ends, the notch shall not exceed ¼ the depth of the joist. Notches over supports may extend the full bearing width of the support.
SPS 321.22(5)(b) (b) Boring of floor joists.
SPS 321.22(5)(b)1.1. `General.' A hole may not be bored in a floor joist within 2 inches of a notch or another hole. In no case shall the distance between adjacent holes be less than the diameter of the larger hole.
SPS 321.22(5)(b)2. 2. `Holes near the edge.' Holes bored in the top or bottom 2 inches of a joist shall follow the limitations for notching under par. (a).
SPS 321.22(5)(b)3. 3. `Other holes.' Holes bored in floor joists that are not within 2 inches of the top or bottom of the joist shall have their diameter limited to 1/3 the depth of the joist.
SPS 321.22(5)(c) (c) Engineered wood products. Notching or boring of engineered wood products shall be done in accordance with the manufacturer's instructions provided those instructions were developed through structural analysis or product testing.
SPS 321.22(6) (6)Overhang of floors.
SPS 321.22(6)(a)(a) General. Except as provided in pars. (b) and (c), a floor joist overhang shall be cantilevered beyond the outer edge of the supporting wall below it by no more than the actual depth of the joist or shall be designed through structural analysis in accordance with s. SPS 321.02 (3).
SPS 321.22(6)(b) (b) Joist overhangs parallel to the main floor framing system. Joist overhangs that are extensions of, and parallel to, the main floor framing system may extend beyond the depth of the joist without structural analysis provided they meet all of the following conditions:
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Published under authority of s. 35.93, Stats. Updated on the first day of each month. Entire code is alwaycurrent. The date shown on each chapter is the date the chapter was last published.