SPS 327.34(6)(a)2.
2. Posts and columns shall bear directly over the middle 1/3 of a footing.
SPS 327.34(6)(a)3.
3. Posts and columns shall be restrained at the top and bottom to resist displacement.
SPS 327.34(6)(a)4.
4. All columns shall be positively attached to the beams they support using clips, straps or saddles.
SPS 327.34(6)(a)5.
5. Posts and columns that use a height adjustment mechanism shall have the mechanism imbedded in concrete or permanently disabled after installation.
SPS 327.34(6)(b)
(b)
Bearing surface. Posts and columns shall have a steel bearing plate affixed to one or both ends to distribute any applied loads and to prevent fiber crushing of any structural member being supported.
SPS 327.34(6)(c)
(c)
Steel posts or columns. Steel posts or columns shall be sized according to one of the following methods:
SPS 327.34(6)(c)1.
1. Manufactured columns shall follow the manufacturer's testing and listing.
SPS 327.34(6)(c)2.
2. Columns made of steel stock, not meeting the requirements of
subd. 1., shall follow a nationally accepted design specification or the size shall be determined through structural analysis or load testing.
SPS 327.34(6)(d)
(d)
Wood posts or columns. Wood posts or columns shall be sized according to Table 327.34 or the size shall be determined through structural analysis or load testing.
SPS 327.34(7)(a)(a) Foundation cripple walls shall be framed with studs at least as large as the studs above.
SPS 327.34(7)(b)
(b) When more than 4 feet in height, cripple walls shall be framed with studs needed for an additional floor level.
SPS 327.34(7)(c)
(c) Cripple walls shall be sheathed on at least one side for its entire length with a wood structural panel that is fastened to both the top and bottom plates or the cripple walls shall be constructed of solid blocking.
SPS 327.34(7)(d)
(d) Cripple walls shall be fully supported by a continuous foundation.
Table 327.34
WOOD COLUMNS
Wood Nominal Size Cross Section Area Height (feet) Allowable Load (pounds)
8 4,900
4” x 4” 12 1/4” 10 3,100
12 2,150
8 7,700
4” x 6” 19 1/4” 10 4,900
12 3,400
8 30,000
6” x 6” 30 1/4” 10 18,900
12 13,300
SPS 327.34 Note
Note: This Table is based on a modulus of elasticity or E of 1,000,000 psi and a fiber bending strength or Fb of 1,000 psi.
SPS 327.34 History
History: EmR1703: emerg. cr., eff. 2-6-17;
CR 17-017: cr.
Register March 2018 No. 747, eff. 4-1-18.
SPS 327.35(1)(a)1.1. Rafters shall be notched to fit the exterior wall plate and fastened to the wall.
SPS 327.35(1)(a)2.
2. Collar ties shall be installed on the upper third of every third pair of abutting roof rafters or every 48 inches, whichever is less.
SPS 327.35(1)(b)1.1. Where rafters meet to form a ridge, the rafters shall be attached to a ridge board.
SPS 327.35(1)(b)2.
2. The ridge board shall have a depth at least equal to the length of the cut end of the rafter abutting it.
SPS 327.35(1)(b)3.
3. Where all rafters are placed directly opposite each other or are offset at the ridge board by less than the thickness of the rafter, the ridge board shall have a nominal thickness of at least 1 inch.
SPS 327.35(1)(b)4.
4. Where one or more rafters are offset at the ridge board by more than the thickness of the rafter, the ridge board shall have a nominal thickness of at least 2 inches.
SPS 327.35(1)(c)
(c)
Ridge beams. Rafters shall be attached to ridge beams using engineered clips, straps, or hangers or the connection shall be designed through structural analysis.
SPS 327.35(1)(d)
(d)
Bearing. The required bearing for wood rafters shall be in accordance with the NDS adopted in Table 327.19-2, except in no case shall the bearing be less than 1 1/2 inches on wood or metal or less than 3 inches on masonry or concrete.
SPS 327.35(1)(e)1.1. In this paragraph, “
ladder” means a perpendicular projection extending beyond the face of the wall below.
SPS 327.35(1)(e)2.
2. Overhangs at gable end walls of more than 12 inches shall be provided with ladders which extend into the structure a distance no less than the length of the overhang.
SPS 327.35(1)(e)4.
4. The interior end of each ladder shall be attached to a rafter or truss with a hanger.
SPS 327.35(2)(a)(a) Ceiling joists shall be nailed to exterior walls and to the ends of rafters.
SPS 327.35(2)(b)
(b) Ends of ceiling joists shall be lapped at least 3 inches and be fastened either with 3-16d nails or in accordance with the floor joist requirements under
s. SPS 327.31 (4) (a) 1. c.
SPS 327.35(2)(c)
(c) Where ceiling joists are placed at right angles to the rafters, the lookout joist or ties shall be fastened to the parallel ceiling joists or rafters using engineered clips, straps or hangers or the connection shall be designed through structural analysis.
SPS 327.35(3)(a)1.1. Where no bearing is provided under valley rafters at the intersection of 2 roof areas, the valley rafters shall be doubled in thickness and shall be at least 2 inches deeper than the required common rafter to permit full bearing at the beveled end.
SPS 327.35(3)(a)2.
2. Where ridges are provided at different elevations, vertical support shall be provided for the interior end of the lower ridge board or ridge beam.
SPS 327.35(3)(b)
(b)
Hip rafters. Where no bearing is provided under hip rafters, the hip rafters shall be of the same thickness as common rafters and shall be at least 2 inches deeper than required to permit full contact with the jack rafter.
SPS 327.35(4)(a)(a) Metal plate connected wood roof trusses shall be designed in accordance with TPI 1 and the NDS adopted under
s. SPS 327.19.
SPS 327.35(4)(c)
(c) If connection is provided to stabilize a non-load bearing wall, a slotted expansion joint or clip shall be used.
SPS 327.35(5)(a)1.1. Notching and boring of beams or girders is prohibited unless determined through structural analysis.
SPS 327.35(5)(b)1.1. Notches located in the top or bottom of ceiling joists and rafters are prohibited from all of the following:
SPS 327.35(5)(b)2.
2. Where ceiling joists or rafters are notched at the ends, the notch may not exceed 1/4 the depth of the member.
SPS 327.35(5)(b)3.
3. Bird mouth cuts may not exceed 1/3 the depth of the rafter unless the seat cut bears fully on the wall plate.
SPS 327.35(5)(c)1.1. Holes bored within 2 inches of the top or bottom of ceiling joists or rafters may not be located in the middle 1/3 of the span of the member.
SPS 327.35(5)(c)4.
4. The distance between adjacent holes may not be less than the diameter of the larger hole.
SPS 327.35(5)(d)
(d)
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 327.35(6)(a)(a)
Structural sheathing. The allowable loads and spans for structural sheathing shall be in accordance with the grade stamp on the panel.
SPS 327.35(6)(b)1.1. Where the rafter spacing is 24 inches on center or less, roof boards may be used that have a minimum thickness of 5/8-inch for solid sheathing and 3/4-inch for spaced sheathing.
SPS 327.35(6)(b)2.
2. Where the rafter spacing is greater than 24 inches on center, roof boards shall be tongue and groove, at least 1 1/2 inches thick.
SPS 327.35(6)(c)1.1. Roof planks shall be tongue and groove or splined and at least 2 inches, nominal, in thickness.
SPS 327.35(6)(c)2.
2. Planks shall terminate over beams unless the joints are end matched.
SPS 327.35(6)(c)3.
3. The planks shall be laid so that no continuous line of joints will occur except at points of support.
SPS 327.35 History
History: EmR1703: emerg. cr., eff. 2-6-17;
CR 17-017: cr.
Register March 2018 No. 747, eff. 4-1-18.
SPS 327.36
SPS 327.36 Weather protection for roofs.
