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5.
Framing around a chimney or bay window.
6.
Attachment of ledger boards to metal-plate-connected wood floor trusses.
1. Wood preservatives for ground contact. The following Table lists common pressure-preservative treatments and retention levels, in pounds per cubic foot, for sawn lumber in ground contact – based on the American Wood Protection Association’s Book of Standards.
Table C–1
PRESERVATIVE TREATMENTS AND RETENTION LEVELS FOR
GROUND CONTACT (IN POUNDS PER CUBIC FOOT)
Species
ACQ-B
ACQ-C
ACQ-D
CA-B
CuN-W
Southern Pine
0.40
0.40
0.40
0.21
0.11
Douglas Fir-Larch
0.40
0.40
NR
0.21
0.11
Hem-Fir
0.40
0.40
0.40
0.21
0.11
Ponderosa Pine
0.40
0.40
0.40
0.21
0.11
Red Pine
0.40
0.40
0.40
0.21
0.11
Spruce-Pine-Fir
NR1
0.40
NR
NR
NR
Redwood
NR
NR
NR
NR
NR
1NR = treatment not recommended.
2. Sources of design values. The sources of the design values in Appendix B are as follows:
Table 1 – Minimum footing sizes: The Building Inspectors Association of Southeast Wisconsin, December 2014.
Table 2 – Maximum post heights: Typical Deck Details, Based on the 2009 International Residential Code, Fairfax County, Virginia, July 2013.
Tables 3A and 3B – Maximum beam spans: Design for Code Acceptance 6, American Wood Council, May 2013.
Table 4 – Maximum joist spans: Design for Code Acceptance 6 (DCA 6), American Wood Council, May 2013; except for the 2x6 values, which are from the Building Inspectors Association of Southeast Wisconsin, December 2014.
Table 5 – Minimum joist-hanger download capacity: Design for Code Acceptance 6, American Wood Council, May 2013; except for the 2x6 values, which are repeated from the 2x8 values.
Table 6 – Ledger-board-fastener spacing: Design for Code Acceptance 6, American Wood Council, May 2013.
Figure 29 – Stringer span length, and Table 7 – Minimum tread sizes: Design for Code Acceptance 6, American Wood Council, May 2013.
Table C–2 – Maximum joist spans for redwood, western cedars, ponderosa pine, and red pine: Design for Code Acceptance 6, American Wood Council, May 2013; except for the 2x6 values, which are from the Building Inspectors Association of Southeast Wisconsin, December 2014.
Table C–3 – Trimmer joist download capacity: Design for Code Acceptance 6, American Wood Council, May 2013.
3. Joist spans for alternate wood species. The following Table lists maximum joist-span lengths for redwood, western cedars, ponderosa pine, and red pine.
Table C–2
MAXIMUM JOIST-SPAN LENGTH1 FOR REDWOOD,
WESTERN CEDARS, PONDEROSA PINE2, AND RED PINE2
Joist Spacing
(on center)
Joist Size
Without Overhang
With Overhangs
2x6
8'-5"
7'-3"
12"
2x8
11'-8"
8'-6"
2x10
14'-11"
12'-3"
2x12
17'-5"
16'-5"
16"
2x6
7'-8"
7'-3"
2x8
10'-7"
8'-6"
2x10
13'-0"
12'-3"
2x12
15'-1"
15'-1"
24"
2x6
6'-7"
6'-7"
2x8
8'-8"
8'-6"
2x10
10'-7"
10'-7"
2x12
12'-4"
12'-4"
1Spans are based on 40 psf live load, 10 psf dead load, normal loading duration, wet service conditions and deflections of Δ=L/360 for main span and L/180 for overhang with a 220-lb. point load.
2Design values based on northern species with no incising assumed.
4. Alternate beam and joist spans. The table on the following two pages lists alternate beam and joist spans and corresponding footing sizes from the Southeast Wisconsin Building Inspectors Association that can be used instead of the values in Appendix B.
Beam and Footing Sizes with Overhangs
Based on No. 2 or better Southern Pine, Douglas Fir-Larch2, and Ponderosa Pine
Post Spacing (Measured Center to Center)
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
Joist Length (JL)1
6'
Southern Pine Beam
1-2x6
1-2x6
1-2x8
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
Douglas Fir-Larch Beam
1-2x6
1-2x8
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
2-2x12
3-2x10
3-2x12
Ponderosa Pine Beam
1-2x6
1-2x8
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
2-2x12
3-2x10
3-2x12
Corner Footing
8
7
6
9
8
7
10
8
7
11
9
8
11
9
8
12
10
9
12
10
9
13
11
9
14
11
10
14
12
10
15
12
10
Intermediate Footing
10
8
7
11
9
8
12
10
9
13
11
9
14
12
10
15
12
11
15
13
11
16
13
12
17
14
12
17
14
13
18
15
13
Footing Thickness
6
6
6
6
6
6
6
6
6
6
8
7'
Southern Pine Beam
1-2x6
1-2x8
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Douglas Fir-Larch Beam
1-2x6
1-2x8
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
3-2x12
Ponderosa Pine Beam
1-2x6
1-2x8
2-2x6
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x10
3-2x12
Eng Bm
Corner Footing
9
7
7
10
8
7
11
9
8
11
9
8
12
10
9
13
11
9
13
11
10
14
12
10
15
12
10
15
12
11
16
13
11
Intermediate Footing
11
9
8
12
10
9
13
11
9
14
12
10
15
12
11
16
13
11
17
14
12
17
14
12
18
15
13
19
15
13
19
16
14
Footing Thickness
6
6
6
6
6
6
6
6
8
8
8
8'
Southern Pine Beam
1-2x6
1-2x8
2-2x6
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Douglas Fir-Larch Beam
1-2x6
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Ponderosa Pine Beam
1-2x6
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
3-2x12
Eng Bm
Corner Footing
10
8
7
10
9
8
11
9
8
12
10
9
13
11
9
14
11
10
14
12
10
15
12
11
15
13
11
16
13
12
17
14
12
Intermediate Footing
12
10
8
13
11
9
14
12
10
15
12
11
16
13
11
17
14
12
18
15
13
19
15
13
19
16
14
20
16
14
21
17
15
Footing Thickness
6
6
6
6
6
6
8
8
8
8
8
9'
Southern Pine Beam
1-2x6
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x10
3-212
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x6
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Corner Footing
10
8
7
11
9
8
12
10
9
13
11
9
14
11
9
14
12
10
15
12
11
16
13
11
16
13
12
17
14
12
18
14
13
Intermediate Footing
12
10
9
14
11
10
15
12
11
16
13
11
17
14
12
18
15
13
19
15
13
20
16
14
20
17
15
21
17
15
22
18
16
Footing Thickness
6
6
6
6
6
8
8
8
8
8
8
10'
Southern Pine Beam
1-2x6
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
2-2x6
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
3-2x12
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x6
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Corner Footing
10
9
8
12
10
8
12
10
9
13
11
10
14
12
10
15
12
11
16
13
11
16
14
12
17
14
12
18
15
13
18
15
13
Intermediate Footing
13
11
9
14
12
10
15
13
11
17
14
12
18
15
13
19
15
13
20
16
14
21
17
15
21
18
15
22
18
16
23
19
16
Footing Thickness
6
6
6
6
8
8
8
8
8
8
10
11'
Southern Pine Beam
1-2x8
2-2x6
2-2x8
2-2x10
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x6
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Corner Footing
11
9
8
12
10
9
13
11
9
14
12
10
15
12
11
16
13
11
16
14
12
17
14
12
18
15
13
19
15
13
19
16
14
Intermediate Footing
13
11
10
15
12
11
16
13
12
17
14
12
19
15
13
20
16
14
21
17
15
22
18
15
22
18
16
23
19
17
24
20
17
Footing Thickness
6
6
6
6
8
8
8
8
8
10
10
12'
Southern Pine Beam
1-2x8
2-2x6
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Corner Footing
11
9
8
12
10
9
14
11
9
15
12
10
15
13
11
16
13
12
17
14
12
18
15
13
19
15
13
19
16
14
20
17
14
Intermediate Footing
14
12
10
15
13
11
17
14
12
18
15
13
19
16
14
20
17
15
21
18
15
22
18
16
23
19
17
24
20
17
25
21
18
Footing Thickness
6
6
6
8
8
8
8
8
10
10
10
Beam and Footing Sizes with Overhangs
Based on No. 2 or better Southern Pine, Douglas Fir-Larch2, and Ponderosa Pine
Post Spacing (Measured Center to Center)
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
Joist Length (JL)1
13'
Southern Pine Beam
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Corner Footing
12
10
8
13
11
9
14
12
10
15
12
11
16
13
12
17
14
12
18
15
13
19
15
13
19
16
14
20
17
14
21
17
15
Intermediate Footing
14
12
10
16
13
12
17
14
13
19
15
13
20
16
14
21
17
15
22
18
16
23
19
17
24
20
17
25
21
18
26
21
19
Footing Thickness
6
6
6
8
8
8
8
10
10
10
10
14'
Southern Pine Beam
1-2x8
2-2x8
2-2x8
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
1-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
1-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Corner Footing
12
10
9
13
11
10
15
12
10
16
13
11
17
14
12
18
14
13
18
15
13
19
16
14
20
17
14
21
17
15
22
18
15
Intermediate Footing
15
12
11
17
14
12
18
15
13
19
16
14
21
17
15
22
18
16
23
19
16
24
20
17
25
21
18
26
21
19
27
22
19
Footing Thickness
6
6
8
8
8
8
10
10
10
10
10
15'
Southern Pine Beam
1-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
2-2x6
2-2x8
2-2x10
2-2x12
2-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
2-2x6
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Corner Footing
12
10
9
14
11
10
15
12
11
16
13
12
17
14
12
18
15
13
19
16
14
20
16
14
21
17
15
22
18
15
22
18
16
Intermediate Footing
15
13
11
17
14
12
19
15
13
20
17
14
21
18
15
23
19
16
24
20
17
25
21
18
26
21
19
27
22
19
28
23
20
Footing Thickness
6
6
8
8
8
10
10
10
10
10
12
16'
Southern Pine Beam
1-2x8
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Douglas Fir-Larch Beam
2-2x6
2-2x8
2-2x10
2-2x12
3-2x10
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Ponderosa Pine Beam
2-2x6
2-2x8
2-2x10
2-2x12
3-2x12
3-2x12
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Eng Bm
Corner Footing
13
11
9
14
12
10
15
13
11
17
14
12
18
15
13
19
15
13
20
16
14
20
17
15
21
18
15
22
18
16
23
19
16
Intermediate Footing
16
13
11
18
15
13
19
16
14
21
17
15
22
18
16
23
19
17
25
20
18
26
21
18
27
22
19
28
23
20
29
24
21
Footing Thickness
6
8
8
8
8
10
10
10
10
12
12
(See PDF for image)Notes:
Joist Length (J ) is Joist Span (L ) plus any cantilever at the beam   2000 psf Soil3
L   J
that is being sized.   3000 psf Soil3
Incising assumed for refractory species Douglas Fir-Larch.   4000 psf Soil3
(See PDF for image)All footing sizes above are base diameters (in inches) and are listed for THREE SOIL CAPACITIES. Soil capacity is based on the requirements of State of Wisconsin SPS 321.15 (3).4
For square footings, insert the diameter (d) into the following formula: √((d/2)2 x π). This number will give you the square dimension and shall be rounded up to the nearest inch.
5. Framing around a chimney or bay window. All members at a chimney or bay window must be framed in accordance with Figure C–1. Headers may span a maximum of 6'-0". Where a chimney or bay window is wider than 6'-0", one or more 6x6 posts may be added to reduce header spans to less than 6'-0". In such cases, the post footing must meet the requirements in section 2 of Appendix B. Plan submittal and approval is required for headers with a span length greater than 6'-0". Headers must be located no more than 3'-0" from the end of the trimmer joist.
Triple trimmer joists are required on each side of the header if joist spacing is 12" or 16" o.c. or if the trimmer joist span exceeds 8'-6"; otherwise, double trimmer joists are permitted. Trimmer joists may bear on the beam and extend past the beam centerline up to LJ/4 as shown in Figures 5 and 7 in Appendix B, or the trimmer joist may attach to the side of the beam with joist hangers as shown in Figure 6 in Appendix B. Joist hangers must each have a minimum download capacity in accordance with Table C–3. Bolts or lag screws used to attach the hanger to the ledger must fully extend through the ledger into the 2-inch nominal lumber band joist (1½" actual) or the EWP rim board. See Figure 15 in Appendix B for fastener spacing, and edge and end distances. Otherwise a free-standing deck is required.
(See PDF for Figure)
Figure C–1
DETAIL FOR FRAMING AROUND A CHIMNEY OR BAY WINDOW
(See PDF for image)(See PDF for image)(See PDF for image)
Table C–3
TRIMMER JOIST HANGER DOWNLOAD CAPACITY
Joist Size
Minimum Capacity, lbs
2x8
1050
2x10
1380
2x12
1500
6. Attachment of ledger boards to metal-plate-connected wood floor trusses. The research report on the following pages shows acceptable methods for attaching a ledger board to a metal-plate-connected wood-floor-truss system.
File reference: SPS 320-325/Rules decks 11_department
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