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Wood structural panel box headers shall be constructed in accordance with Figure R602.7.3 and Table R602.7.3. TABLE R602.7.3 MAXIMUM SPANS FOR WOOD STRUCTURAL PANEL BOX HEADERSa
| HEADER CONSTRUCTIONb || HEADER DEPTH |
| HOUSE DEPTH (feet) |
|24 ||26 ||28 ||30 ||32 |
|Wood structural panel‒one side ||9 ||4 ||4 ||3 ||3 ||‒ |
|15 ||5 ||5 ||4 ||3 ||3 |
|Wood structural panel‒both sides ||9 ||7 ||5 ||5 ||4 ||3 |
|15 ||8 ||8 ||7 ||7 ||6 |
|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. |
|a. Spans are based on single story with clear-span trussed roof or two story with floor and roof supported by interior-bearing walls. |
|b. See Figure R602.7.3 for construction details. |
FIGURE R602.7.3 TYPICAL WOOD STRUCTURAL PANEL BOX HEADER CONSTRUCTION
|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. |
|a. The top and bottom plates shall be continuous at header location. |
|b. Jack studs shall be used for spans over 4 feet. |
|c. Cripple spacing shall be the same as for studs. |
|d. Wood structural panel faces shall be single pieces of 15/32-inch-thick Exposure 1 (exterior glue) or thicker, installed on the interior or exterior or both sides of the header. |
|e. Wood structural panel faces shall be nailed to framing and cripples with 8d common or galvanized box nails spaced 3 inches on center, staggering alternate nails 1/2 inch. Galvanized nails shall be hot-dipped or tumbled. |
Related Code Sections
Wood structural panel box headers shall be constructed in accordance with Figure R602.7.3 and Table R602.7.3. TABLE R602.7.3 MAXIMUM SPANS FOR ...
Wood structural panel box headers shall be allowed where SIP headers are not applicable. Wood structural panel box headers shall be constructed in accordance with Figure R602.7.3 and Table R602.7.3 ...
only. Edges shall be blocked with lumber or other approved type of edge supports. c. For composite and four-ply plywood structural panel, load shall be reduced by 15 pounds per square foot. Two-inch (51 mm) sawn tongue-and-groove decking shall comply with Sections 2304.9.4.1 through 2304.9.4.3. Connectors and fasteners shall comply with the applicable provisions of Sections 2304.10.1 through 2304.10.7. Mechanically laminated decking shall comply with Sections 2304.9.3.1 through 2304.9.3.3. Fastenings, including nuts and washers, for wood foundations shall be as required in AWC PWF. The framing of woodjoisted floors and wood-framed roofs shall be in accordance with the provisions specified in Section 2308 unless a specific design is furnished. Studs shall have full bearing on a 2-inch-thick (actual 1 1 / 2 -inch, 38 mm) or larger plate or sill having a width at least equal to the width of the studs. Where supported by a wall, roof decks shall be anchored to walls to resist uplift forces determined in accordance with Chapter 16. Such anchors shall consist of steel or iron bolts of sufficient strength to resist vertical uplift of the roof. Combustible framing shall be a minimum of 2 inches (51 mm), but shall not be less than the distance specified in Sections 2111 and 2113 and the International Mechanical Code , from flues, chimneys and fireplaces, and 6 inches (152 mm) away from flue openings. Wood shall be protected from decay and termites in accordance with the applicable provisions of Sections 2304.12.1 through 2304.12.7. Wall sheathing on the outside of exterior walls, including gables, and the connection of the sheathing to framing shall be designed in accordance with the general provisions of this code and shall be capable of resisting wind pressures in accordance with Section 1609. Mechanically laminated decking consists of square-edged dimension lumber laminations set on edge and nailed to the adjacent pieces and to the supports. Headers, double joists, trusses or other approved assemblies that are of adequate size to transfer loads to the vertical members shall be provided over window and door openings in load-bearing walls and partitions. Fasteners, including nuts and washers, in contact with preservative-treated wood shall be of hot-dipped zinc-coated galvanized steel, stainless steel, silicon bronze or copper. Fasteners other than nails, timber rivets, wood screws and lag screws shall be permitted to be of mechanically deposited zinccoated steel with coating weights in accordance with ASTM B695, Class 55 minimum. Connectors that are used in exterior applications and in contact with preservative-treated wood shall have coating types and weights in accordance with the treated wood or connector manufacturer's recommendations. In the absence of manufacturer's recommendations, a minimum of ASTM A653, Type G185 zinc-coated galvanized steel, or equivalent, shall be used. Exception: Plain carbon steel fasteners, including nuts and washers, in SBX/DOT and zinc borate preservative-treated wood in an interior, dry environment shall be permitted. Three- and four-inch (76 mm and 102 mm) sawn tongue-and-groove decking shall comply with Sections 2304.9.5.1 through 2304.9.5.3. Connections depending on joist hangers or framing anchors, ties and other mechanical fastenings not otherwise covered are permitted where approved . The vertical load-bearing capacity, torsional moment capacity and deflection characteristics of joist hangers shall be determined in accordance with ASTM D7147. Clips, staples, glues and other approved methods of fastening are permitted where approved . Clearance between wood siding and earth on the exterior of a building shall not be less than 6 inches (152 mm) or less than 2 inches (51 mm) vertical from concrete steps, porch slabs, patio slabs and similar horizontal surfaces exposed to the weather except where siding, sheathing and wall framing are of naturally durable or preservative-treated wood . Fasteners, including nuts and washers, for fire-retardant-treated wood used in interior locations shall be in accordance with the manufacturer's recommendations. In the absence of manufacturer's recommendations, Section 2304.10.5.3 shall apply. Where wall framing members are not continuous from the foundation sill to the roof, the members shall be secured to ensure a continuous load path. Where required, sheet metal clamps, ties or clips shall be formed of galvanized steel or other approved corrosion-resistant material not less than 0.0329-inch (0.836 mm) base metal thickness. Wood columns and posts shall be framed to provide full end bearing. Alternatively, column-and-post end connections shall be designed to resist the full compressive loads, neglecting end-bearing capacity. Column-and-post end connections shall be fastened to resist lateral and net induced uplift forces. Where a structure or portion thereof is required to be of Type IV construction by other provisions of this code, the building elements therein shall comply with the applicable provisions of Sections 2304.11.1 through 2304.11.5. Columns shall be continuous or superimposed throughout all stories by means of reinforced concrete or metal caps with brackets, or shall be connected by properly designed steel or iron caps, with pintles and base plates, or by timber splice plates affixed to the columns by metal connectors housed within the contact faces, or by other approved methods. Girders and beams shall be closely fitted around columns and adjoining ends shall be cross tied to each other, or intertied by caps or ties, to transfer horizontal loads across joints. Wood bolsters shall not be placed on tops of columns unless the columns support roof loads only. Approved wall plate boxes ...
panel shall be sheathed on one face with a single layer of 3 / 8 -inch (9.5 mm) minimum-thickness wood structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Figure 2308.6.5.2. The wood structural panel sheathing shall extend up over the solid sawn or glued-laminated header ...
) and a height of not more than 10 feet (3048 mm). Each panel shall be sheathed on one face with 3 / 8 -inch (3.2 mm) minimum-thickness wood structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Table 2304.10.1 and blocked at wood structural panel edges. Two anchor bolts installed in accordance with Section 2308.3.1 shall be provided in each panel. Anchor bolts shall be placed at each panel outside quarter points. Each panel end stud shall have a hold-down device fastened to the foundation, capable of providing an approved uplift capacity of not less than 1,800 pounds (8006 N). The hold-down device shall be installed in accordance with the manufacturer's recommendations. The ABW shall be supported directly on a foundation or on floor framing supported directly on a foundation that is continuous across the entire length of the braced wall line . This foundation shall be reinforced with not less than one No. 4 bar top and bottom. Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned-down slab edge is permitted at door openings in the braced wall line . This continuous footing or turned-down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped 15 inches (381 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line . Where the ABW is installed at the first story of two-story buildings, the wood structural panel sheathing shall be provided on both faces, three anchor bolts shall be placed at one-quarter points and tie-down device uplift capacity shall be not less than 3,000 pounds (13 344 N). For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. FIGURE 2308.6.5.1 ALTERNATE BRACED WALL PANEL (ABW) A PFH shall be constructed in accordance with this section and Figure 2308.6.5.2. The adjacent door or window opening shall have a full-length header. In ...