SPS 327.20 Note
Note: See ch.
NR 116, rules of the department of natural resources, for special requirements relating to buildings located in flood plain zones. Information regarding the elevation of the regional flood may be obtained from the local zoning official.
SPS 327.20(3)(a)(a)
General. Design, construction, installation, practice and structural analysis shall conform to the following nationally recognized standards.
SPS 327.20(3)(b)1.1. Structural lumber, glue-laminated timber, timber pilings, and fastenings shall be designed in accordance with the “National Design Specification for Wood Construction" and the “Design Values for Wood Construction," a supplement to the National Design Specification for Wood Construction, except the provisions of section 4.1.7 shall also apply to reused lumber. Reused lumber shall be considered to have a duration of load factor of 0.90.
SPS 327.20(3)(b)2.
2. Span tables for joists and rafters approved by the department may be used in lieu of designing by structural analysis.
SPS 327.20(3)(b)3.
3. Sawn lumber that is not graded in accordance with the standards under
subd. 1., shall use the NDS published allowable design stresses for the lumber species using grade number 3 when used for studs, stringers, rafters or joists and may use grade number 1 when used for beams, posts, or timbers.
SPS 327.20(3)(c)
(c)
Whole logs. Camping units constructed of whole logs shall conform to ICC 400, Standard on the Design and Construction of Log Structures.
SPS 327.20 Note
Note: This standard requires the minimum log diameter to be 8 inches.
SPS 327.20(3)(d)1.1. All building components shall be fastened to withstand the dead load and live load.
SPS 327.20(3)(d)2.
2. Fasteners shall comply with the schedule listed in Table 327.20-2, except other fastening methods may be allowed if engineered under
s. SPS 327.20 (3).
Table 327.20-2
MINIMUM FASTENER SCHEDULE TABLE
Other interior and exterior panel products and finishes installed per manufacturer requirements.
For engineered connectors, use manufacturer's specified fasteners.
Description of Building Materials/Connection Number and Type of Fastener1 2 3
Floor Framing
Joist to joist, face nailed over support 3-8d
Joist to sill or girder, toe nail 3-8d
Band or rim joist to joist, end nail 3-16d
Band or rim joist to sill or top plate 2-16d at 16 o.c.
Bridging to joist, toe nail each end 2-8d
Built-up girder and beams, top loaded 10d at 32” o.c. at top and bottom
and staggered and two at ends and at each splice
Built-up girder and beams, side-loaded 16d at 16” o.c. at top and bottom and staggered
and two at ends and at each splice
Ledger strip to beam, face nail 3-16d each joist
Joist on ledger to beam, toe nail 3-8d
Wall Framing
Sole plate to joist or blocking, face nail 2-16d at 16” o.c.
Top or sole plate to stud, end nail 2-16d
Stud to sole plate, toe nail 3-8d or 2–16d
Doubled studs, face nail 10d at 24” o.c.
Doubled top plates, face nail 10d at 24” o.c.
Doubled top plates, minimum 24” offset of end joints, face nail 8–
16d
in lapped area
Top plates, laps and intersections, face nail 2–10d
Continuous header, two pieces 16d at 16” o.c. along each edge
Continuous header to stud, toe nail 4-8d
1” corner brace to each stud and plate, face nail 2-8d or 2 staples, 1 3/4”
Built-up corner studs 10d at 24” o.c.
Roof/Ceiling Framing
Ceiling joists to plate, toe nail 3-8d
Ceiling joist, laps over partitions, face nail 3–10d
Ceiling joist to parallel rafters, face nail 3-16d
Rafter to plate, toe nail (maximum 6 rafter span, engineered 2-16d
connector for longer)
Roof rafters to ridge, valley or hip rafters, toe nail 4-16d
Roof rafters to ridge, valley or hip rafters, face nail 3-16d
Collar ties to rafters, face nail 3-8d
Boards and planks
1” x 6” subfloor or less to each joist, face nail 2-8d or 2 staples, 1 3/4”
Wider than 1” x 6” subfloor toe to each joist, face nail 3-8d or 4 staples 1 3/4”
2” subfloor to joist or girder, blind and face nail 2-16d
1” x 6” roof or wall sheathing to each bearing, face nail 2-8d or 2 staples, 1 3/4”
1” x 8” roof or wall sheathing to each bearing, face nail 2-8d or 3 staples, 1 3/4”
Wider than 1” x 8” roof sheathing to each bearing, face nail 3-8d or 4 staples, 1 3/4”
2” planks 2-16d at each bearing
Panel Sheathing
Spacing of Fastener
Intermediate
Material Fastener Edges Supports
Engineered wood panel for
subfloor and roof sheathing
and wall corner wind bracing
to framing
5 /16” to 1/2” 6d common or deformed nail or staple, 1 1/2” 6” 12”4
5 /8” to 3/4” 8d smooth or common, 6d deformed nail, or 6” 12”4
staple, 14 ga. 1 3/4”
7 /8” to 1” 8d common or deformed nail 6” 12”
1 1 /8” to 1 1/4” 10d smooth or common or 8d deformed nail 6” 12”
Combination
subfloor/ underlayment
to framing
3/4” or less 6d deformed or 8d smooth or common nail 6”
12”
7/8” to 1” 8d smooth, common or deformed nail 6”
12”
1 1 /8” to 1 1/4” 10d smooth or common or 8d deformed nail 6” 12”
Wood panel siding to framing
1/2” or less 6d corrosion-resistant siding and casing nails 6”
12”
5/8” 8d corrosion-resistant siding and casing nails 6”
12”
1/2” structural cellulosic 1 1/2” galvanized roofing nail; 8d common nail; 3” 6”
fiberboard sheathing staple 16 ga., 1 1/2” long
25/32” structural cellulosic 1 3/4” galvanized roofing nail; 8d common nail; 3” 6”
fiberboard sheathing staple 16 ga., 1 3/4” long
1/2” gypsum sheathing5 1 1/2” galvanized roofing nail; 6d common nail; 4” 8”
staple galvanized 1 1/2” long; 1 1/4” screws, Type
W or S
5/8” gypsum sheathing5 1 3/4” galvanized roofing nail; 8d common nail; 7” 7”
staple galvanized 1 5/8” long; 1 5/8” screws, Type
W or S
1 All nails are smooth-common, box or deformed shank except where otherwise stated.
2 Nail is a general description and may be T-head, modified round head or round head.
3 Staples are 16-gauge wire, unless otherwise noted, and have a minimum 7 /16” o.d. crown width.
4 Staples shall be spaced at not more than 10” o.c. at intermediate supports for floors.
5 Apply vertically 4” x 8” or 4” x 9” panels.
