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nate supports. Not more than seven intervening courses less steel driven fasteners shall be in accordance with the
shall be permitted before this pattern is repeated. material requirements of ASTM F1667.
2304.9.5 Three- and four-inch sawn tongue-and-groove 2304.10.5.1 Fasteners and connectors for preserva-
decking. Three- and four-inch (76 mm and 102 mm) sawn tive-treated wood. Fasteners, including nuts and wash-
tongue-and-groove decking shall comply with Sections ers, in contact with preservative-treated wood shall be
2304.9.5.1 through 2304.9.5.3. of hot-dipped zinc-coated galvanized steel, stainless
2304.9.5.1 General. Three-inch (76 mm) and four-inch steel, silicon bronze or copper. Staples shall be of stain-
(102 mm) decking shall have a maximum moisture less steel. Fasteners other than nails, staples, timber riv-
content of 19 percent. Decking shall be machined with ets, wood screws and lag screws shall be permitted to
a double tongue-and-groove pattern. Decking pieces be of mechanically deposited zinc-coated steel with
shall be interconnected and nailed to the supports. coating weights in accordance with ASTM B695, Class
55 minimum. Connectors that are used in exterior
2304.9.5.2 Nailing. Each piece shall be toenailed at applications and in contact with preservative-treated
each support with one 40d common nail and face- wood shall have coating types and weights in accor-
nailed with one 60d common nail. Courses shall be dance with the treated wood or connector manufacturer’s
spiked to each other with 8-inch (203 mm) spikes at recommendations. In the absence of manufacturer's rec-
maximum intervals of 30 inches (762 mm) through pre- ommendations, not less than ASTM A653, Type G185
drilled edge holes penetrating to a depth of approxi- zinc-coated galvanized steel, or equivalent, shall be used.
mately 4 inches (102 mm). One spike shall be installed
at a distance not exceeding 10 inches (254 mm) from Exception: Plain carbon steel fasteners, including
the end of each piece. nuts and washers, in SBX/DOT and zinc borate pre-
servative-treated wood in an interior, dry environ-
2304.9.5.3 Controlled random pattern. There shall be ment shall be permitted.
a minimum distance of 48 inches (1219 mm) between
end joints in adjacent courses. Pieces not bearing on a 2304.10.5.2 Fastenings for wood foundations. Fas-
support are permitted to be located in interior bays pro- tenings, including nuts and washers, for wood founda-
vided that the adjacent pieces in the same course con- tions shall be as required in AWC PWF.
tinue over the support for not less than 24 inches (610 2304.10.5.3 Fasteners for fire-retardant-treated
mm). This condition shall not occur more than once in wood used in exterior applications or wet or damp
every six courses in each interior bay. locations. Fasteners, including nuts and washers, for
2304.10 Connectors and fasteners. Connectors and fasten- fire-retardant-treated wood used in exterior applica-
ers shall comply with the applicable provisions of Sections tions or wet or damp locations shall be of hot-dipped
2304.10.1 through 2304.10.7. zinc-coated galvanized steel, stainless steel, silicon
bronze or copper. Staples shall be of stainless steel.
2304.10.1 Fastener requirements. Connections for wood Fasteners other than nails, staples, timber rivets, wood
members shall be designed in accordance with the appro- screws and lag screws shall be permitted to be of
priate methodology in Section 2302.1. The number and mechanically deposited zinc-coated steel with coating
size of fasteners connecting wood members shall be not weights in accordance with ASTM B695, Class 55
less than that set forth in Table 2304.10.1. minimum.
2304.10.2 Sheathing fasteners. Sheathing nails or other
approved sheathing connectors shall be driven so that their 2304.10.5.4 Fasteners for fire-retardant-treated
wood used in interior applications. Fasteners, includ-
head or crown is flush with the surface of the sheathing.
ing nuts and washers, for fire-retardant-treated wood
2304.10.3 Joist hangers and framing anchors. Connec- used in interior locations shall be in accordance with
tions depending on joist hangers or framing anchors, ties the manufacturer’s recommendations. In the absence of
and other mechanical fastenings not otherwise covered are manufacturer’s recommendations, Section 2304.10.5.3
permitted where approved. The vertical load-bearing shall apply.
capacity, torsional moment capacity and deflection char- 2304.10.6 Load path. Where wall framing members are
acteristics of joist hangers shall be determined in accor- not continuous from the foundation sill to the roof, the
dance with ASTM D7147. members shall be secured to ensure a continuous load
2304.10.4 Other fasteners. Clips, staples, glues and other path. Where required, sheet metal clamps, ties or clips
approved methods of fastening are permitted where shall be formed of galvanized steel or other approved cor-
approved. rosion-resistant material not less than 0.0329-inch (0.836
mm) base metal thickness.
2304.10.5 Fasteners and connectors in contact with pre-
servative-treated and fire-retardant-treated wood. Fas- 2304.10.7 Framing requirements. Wood columns and
teners, including nuts and washers, and connectors in posts shall be framed to provide full end bearing. Alterna-
contact with preservative-treated and fire-retardant-treated tively, column-and-post end connections shall be designed
wood shall be in accordance with Sections 2304.10.5.1 to resist the full compressive loads, neglecting end-bearing
through 2304.10.5.4. The coating weights for zinc-coated capacity. Column-and-post end connections shall be fas-
fasteners shall be in accordance with ASTM A153. Stain- tened to resist lateral and net induced uplift forces.

492 2018 INTERNATIONAL BUILDING CODE ®
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