No preview available
HomeMy WebLinkAboutConstruction Guide6 re, p 4 c-rNC� FHe COPY. 2cc,l -� Ss� Engineered Wood Construction Guide WOOD The Natural Choice Engineered wood products are a good choice for the environment. They are manufactured for years of trouble -free, dependable use. They help reduce waste by decreasing disposal costs and product damage. Wood is a renewable resource that is easily manufactured into a variety of viable products. A few facts about wood. ■ We're growing more wood every day. Forests fully cover one-third of the United States' and one-half of Canada's land mass. American landowners plant more than two billion trees every year. In addition, millions of trees seed naturally. The forest products industry, which comprises about 15 percent of forestland ownership, is responsible for 41 percent of replanted forest acreage. That works out to more than one billion trees a year, or about three million trees planted every day. This high rate of replanting accounts for the fact that each year, 27 percent more timber is grown than is harvested. Canada's replanting record shows a fourfold increase in the number of trees planted between 1975 and 1990. ■ Life Cycle Assessment shows wood is the greenest building product. A 2004 Consortium for Research on Renewable Industrial Materials (CORRIM) study gave scientific validation to the strength of wood as a green building product. In examining building products' life cycles — from extraction of the raw material to demolition of the building at the end of its long lifespan — CORRIM found that wood was better for the environment than steel or concrete in terms of embodied energy, global warming potential, air emissions, water emissions and solid waste production. For the complete details of the report, visit www.CORRIM.org. ■ Manufacturing wood is energy efficient. Wood products made up 47 percent of all industrial raw materials manufactured in the United States, yet consumed only 4 percent of the energy needed to manufacture all industrial raw materials, according to a 1987 study. Material Percent of Production Percent of Energy Use Wood 47 4 Steel 23 48 Aluminum 2 8 ■ Good news for a healthy planet. For every ton of wood grown, a young forest produces 1.07 tons of oxygen and absorbs 1.47 tons of carbon dioxide. Wood: It's the natural choice for the environment, for design and for strong, lasting construction. NOTICE: A PAS a The recommendations in this guide apply only to products that bear PAMD 132j6 the APA trademark. SOD 0SURE I the APA ti-coto Only rademark cts bearing rttGO 00 �t� are subject to the � 0..' ,, Association's quality auditing program. 2 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. E30V • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Engineered Wood Construction Guide 3 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. E30V • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG WALL CONSTRUCTION Building codes require that walls resist wind pressures caused by the design wind speeds, resist wall -racking forces and provide weather protection. This section provides details on how wood structural panels can be used to meet these fundamental requirements. APA Sturd-l-Wall° The APA Sturd-I-Wall system consists of APA RATED SIDING (panel or lap) applied direct to studs or over nonstruc- tural fiberboard, gypsum or rigid foam insulation sheathing*. Nonstructural sheathing is defined as sheathing not recognized by building codes for meeting both bending and racking strength requirements. *Where panel siding is applied over foam sheathing, see APA publication APA Rated Siding Panels over Rigid Foam Insulation Sheathing, Form C465. TABLE 19 FASTENING APA RATED SIDING (PANEL) APPLIED DIRECT -TO -STUDS OR OVER NONSTRUCTURAL SH EATHING(1)Ibl(-)(d)(o) Minimum Nail(Q Panel Nail Spacing Maximum Wind Speed (mph) Shank Penetration Wall Stud Intermediate Wind Exposure Category APA Rated Diameter in Framing Spacing Edges(g) Supports Panel Siding (in.) (in.) (in. o.c.) (in. o.c.) (in. o.c.) B C D 3/8 Performance 16 6 12 110 90 90 Category 1'S 6 140 120 110 APA MDO 12 90 NP NP GENERAL 24 6 6 130 110 100 0113 . APA Rated Siding 12 125 105 90 16 oc 16 6 6 140 120 110 APA Rated Siding 2.0 12 100 85 NP 24 oc 24 6 6 140 120 110 (a) Table is based on wind pressures acting toward and away from (d) Hot -dip galvanized nails are recommended for most siding building surfaces, at 30-ft height in wall Zone 5 (corners) with applications, see Siding Fasteners section on page 48 for more smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and information. Section R301.2 of the 2009 IRC. Stud specific gravity = 0.42. (e) Maximum stud spacing shall be in accordance with Table 21A. (b) Recommendations of siding manufacturer may vary. (f) See Table 5, page 14, for nail dimensions. (c) For use as wood structural panel wall bracing, the minimum (g) Supported panel joints shall occur approximately along the center - fastener spacing of 6' o.c. at panel edges and 12' o.c. at interme- line of framing with a minimum bearing of 1/2'. Fasteners shall diate supports shall be sufficient except: be located 3/8' from panel edges. Siding installed over two or (1) For braced wall section with Performance Category 3/8 panel more spans. siding applied horizontally over studs 24' o.c., space nails 3' o.c. along panel edges. 45 1 ENGINEERED WOOD CONSTRUCTION GUIDE - FORM NO. B360P - © 2011 APA -THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction TABLE 20 APA RATED LAP SIDING APPLIED DIRECT -TO -STUDS OR OVER NONSTRUCTURAL SHEATHINGM(b)(c)(d)(0 Minimum Nail(Q Maximum Wind Speed (mph) Minimum Shank Diameter Penetration in Performance Wall Stud Spacing Lap Siding Wind Exposure Category (in.) Framing (in.) Category (in.) (in. o.c.) Width (in.) B C D 6 140 120 110 3/8 16 8 140 120 110 12 120 100 90 6 140 120 110 0.113 1.5 7/16 16 8 140 120 110 12 120 100 90 6 140 120 110 7/16 24 8 120 100 90 12 90 NP NP (a) Table is based on wind pressures acting toward and away from (d) Hot -dip galvanized nails are recommended for most siding applica- building surfaces, at 30-ft height in wall Zone 5 (corners) with tions, see Siding Fasteners section of page 48 for more information. smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and Section R301.2 of the 2009 IRC, Stud specific = 0.42. (e) Supported panel joints shall occur approximately along the center - gravity line of framing with a minimum bearing of 1/2". Fasteners shall (b) Recommendations of siding manufacturer may vary. be located 3/8" from panel edges. Siding installed overtwo or (c) APA Rated lap siding rated 16 oc and 24 oc shall be used with more spans. a maximum stud spacing of 16" o.c. and 24" o.c., respectively. (f) See Table 5, page 14, for nail dimensions. TABLE 21A MAXIMUM STUD SPACING: APA RATED SIDING (PANEL) APPLIED DIRECT -TO -STUDS OR STRUCTURAL SHEATHING Minimum Performance Maximum Stud Spacing (in.) for Vertical Rows of Nails Category or Siding Description Span Rating Parallel to Supports Perpendicular to Supports 3/8 16 24 APA MDO GENERAL 15/32 24 24 16 oc 16 16M APA Rated Siding 24 oc 24 24 (a) Stud spacing may be 24' o.c. for veneer -faced siding panels. TABLE 21B APA RATED SIDING (PANEL) APPLIED TO STRUCTURAL SHEATHING(°I(b)(�)(d)(s) Minimum Nail(l)(9) Panel Nail Spacing Maximum Wind Speed (mph) Wall Stud Intermediate Wind Exposure Category APA Rated Shank Diameter Spacing Edges(h) Supports Panel Siding (in.) (in. o.c.) (in. o.c.) (in. o.c.) B C D 3/8 Performance Category 16 6 12 110 90 85 APA MDO GENERAL 0.120 ring shank 6 125 105 90 APA Rated Siding 12 90 NP NP 16 oc or 24 oc 24 6 6 110 90 85 (a) Table is based on wind pressures acting toward and away from (d) Hot -dip galvanized nails are recommended for most siding applica- building surfaces, at 30-ft height in wall Zone 5 (corners) with tions, see Siding Fasteners section on page 48 for more information. smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and Section R301.2 of the 2009 IRC, Stud specific gravity = 0.42. (e) Maximum stud spacing shall be in accordance with Table 21A. (b) Recommendations of siding manufacturer may vary. (f) Ring shank nail shall used. (c) For use as wood structural panel wall bracing, the minimum fas- , for nail dimensions. tener spacing of 6" o.c. at panel edges and 12" o.c. at intermediate (h) Supported panel joints shall occur approximately along the center - supports shall be sufficient. line of framing with a minimum bearing of 1/2'. Fasteners shall be located 3/8" from panel edges. 46 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA—THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction A single layer of wood structural panel siding, since it is strong and rack resistant, eliminates the cost of installing separate structural sheathing or diagonal wall bracing. Panel sidings are normally installed vertically, but may also be placed hori- zontally (long dimension across supports) if horizontal joints are blocked. Maximum stud spacings for both applications are given in Tables 19, 20 and 21. When installing panel or lap siding over rigid foam insulation sheathing, drive the nails flush with the siding surface, but avoid over -driving, which can result in dimpling of the siding due to the compressible nature of foam sheathing. Sidings are occasionally treated with water repellents or wood preservatives to improve finishing characteristics or mois- ture resistance for certain applications. If the siding has been treated, allowing the surface treatment to dry will avoid solvent or chemical reaction with the foam sheathing. When rigid foam insulation sheathing is used, building codes also generally require installation of 1/2-inch gypsum wallboard, or other materials of the required thermal barrier rating, on the inside surface of the wall for fire protection. See Figures 8 through 12 for panel and lap siding installation recommendations for the Sturd-I-Wall system or for siding installed over nailable sheathing. See APA's Build A Better Home: Walls, Form A530, for additional recommended details to avoid moisture penetration in walls. All panel siding edges in Sturd-I-Wall construction should be backed with framing or blocking. Use nonstaining, non- corrosive nails as described in Tables 19, 20 and 21 to prevent staining the siding. Where siding is to be applied at an angle, install only over wood structural panel sheathing. Note: Gluing of siding to framing is not recommended due to the increased potential for panel buckling. APA APA RATED SIDING RA70SMINLI LAP 303.1541IW 30340-SM 160C GROUP 1 160C GROUPI O®FORSPAWW EXTERIOR EXTERIOR THICKNESS OA51 K THICKNESS 0.57e IN. 0o0 — 11� 000 — P3149 PI1.0/ fJ PRR101 HUMM40 C7 ISWCATEGORY fJ PR1108 HUM" V IMCA1EGORY APA RATED SIDING LAP 16oc EXTERIOR THICKNESS CM IN. 000 PRP•101 NUDUY40 ANSUAPAPRP-210 1SM CATEGORY APA RATED SIDING 24oc GRouP1 IMFOROPACUIO EXTERIOR THICKNESS 0.575 IN. 000 PI idl �PRP401 HUM" SW CATEGORY FIGURE 8 APA STURD-I-WALL (Vertical Panel Installation) Building paper or code - recognized weather-resi barrier required behind Panel siding meets code requirements for wall br APA RATED SIDING par All edges supported by or blocking. 1/8" spacing is recomm at all edge and end join otherwise indicated by K 6" minimum clearance, siding to grade 47 1 ENGINEERED WOOD CONSTRUCTION GUIDE - FORM NO. B360P - © 2011 APA—THE ENGINEERED WOOD ASSOCIATION - WWW.APAWOOD.ORG Wall Construction Siding Fasteners Hot -dip galvanized nails are recommended for most sid- ing applications. For best performance, stainless steel or aluminum nails should be considered. APA tests also show that electrically or mechanically galvanized steel nails appear satisfac- tory when plating meets or exceeds thickness require- ments of ASTM A641 Class 2 coatings, and is further pro- tected by yellow chromate coating. Note that galvanized fasteners may react under wet conditions with the natural extractives of some wood spe- cies and may cause staining if left unfinished. Such staining can be minimized if the sid- ing is finished in accordance with APA recommendations, FIGURE 9 APA STURD-I-WALL (Horizontal Panel Siding Installation) Building paper or other code -recognized See Tables 19, 20 and weather -resistive barrier 21 for maximum w; stud spacing Battens at 4' or 8' o.c. Panel siding meets to conceal butt joints at code requirements panel ends. Nails through for wall bracing battens must penetrate studs at least 1 ". �— Seal panel edges APA RATED SIDING panels (nailing as required for vertical installation) 1/8" spacing is — recommended at all edge and end joints unless otherwise indicated by panel manufacturer 6" minimum clearance, siding to grade or if the roof overhang protects the siding from direct exposure to moisture and weathering. 2x4 blocking at horizontal joints Wood Structural Panel Sheathing as a Nail. Base for Siding The recommendations in Tables 22 and 23 for panel and lap siding apply to siding installed over wood structural panel sheathing. Unless otherwise indicated in the local building code, nailable sheathing includes: 1. Nominal 1-inch boards with studs 16 or 24 inches D.C. 2. APA RATED SHEATHING panels with roof Span Rating of 24 inches or greater installed with strength axis either parallel or perpendicular to studs 16 or 24 inches o.c. (except 3-ply plywood panels must be applied with strength axis across studs when studs are spaced 24 inches o.c.). 3. APA RATED SHEATHING panels with roof Span Rating less than 24 inches installed with strength axis either par- allel or perpendicular to studs 16 inches D.C. (except plywood panels 3/8 Performance Category or less must be applied with strength axis across studs). Lap siding joints, if staggered, and panel siding joints may occur away from studs with wood structural panel sheathing. Note: In addition to panel edge spacing and the use of straight studs, nailing sequence can also be a factor in maintaining a uniformly flat appearance of the finished wall. Installation procedure: First, position the panel, maintaining recommended edge spacing, and lightly tack at each corner. Install the first row of nails at the edge next to the preceding panel from top to bottom. Remove remaining tacking nails. Then nail the row at the first intermediate stud. Continue by nailing at the second intermediate stud, and finally, at the edge opposite the preceding panel. Complete the installation by fastening to the top and bottom plates. 48 1 ENGINEERED WOOD CONSTRUCTION GUIDE - FORM NO. B360P - 0 2011 APA- THE ENGINEERED WOOD ASSOCIATION - WWW.APAWOOD.ORG Wall Construction For other fastener types, refer to Table 22. It provides the withdrawal resistance for a number of different fastener types (smooth-, ring- and screw -shank nails; wood screws and vinyl siding nails). Together with the wind load tables in the 2006 and 2009 International Residential Codes, IRC Tables R301.2(2) and R301.2(3), the attachment schedules for any combination of siding type, continuous wood structural panel sheathing, design wind speed and exposure can be determined. See APA Technical Topic: Wood Structural Panels Used as Nailable Sheathing, Form TT-109 for more information including wind load tables and a sample calculation. TABLE 22 FASTENER WITHDRAWAL LOADS FOR THE ATTACHMENT OF SIDING TO CONTINUOUS WOOD STRUCTURAL PANEL WALL SHEATHING1el Ring -Shank Nails(b)le) Withdrawal Loads (Ibf) Nail Diameter (in.) Wall Sheathing Performance 0.097 Category 0.091 0.094 0.099 0.113 0.120 0.128 0.135 0.148 3/8 31 32 33 38 41 43 46 50 7/16 36 37 38 45 48 51 53 59 15/32 and 1/2 39 40 41 48 51 54 57 63 19/32 and 5/8 49 51 52 61 64 69 73 80 23/32 and 3/4 59 61 63 74 78 83 88 96 Wood Screwslelldl Withdrawal Loads (Ibf) Screw Gauge/Diameter (in.) Wall Sheathing Performance #6 #7 #8 #9 #10 #12 #14 Category 0.138 0.151 0.164 0.177 0.19 0.216 0.242 3/8 48 52 57 61 66 75 84 7/16 61 66 72 77 87 98 _56 —15/32 and 1/2 60 65 71 77 82 93 105 19/32 and 5/8 76 83 90 97 104 118 133 23/32 and 3/4 92 100 109 117 126 143 161 Vinyl Siding Nailstctlell1l Smooth -Shank and Screw -Shank Nails(0M Withdrawal Loads (Ibf) Withdrawal Loads Wall Sheathing Nail Diameter (in.) Nail Diameter (in.) Performance Category 0.092 0.099 0.113 0.120 0.128 0.131 0.135 0.148 0.122 0.125 3/8 8 8 9 10 11 11 11 12 10 10 7/16 9 10 11 12 13 13 13 14 12 12 15/32 and 1/2 10 10 12 13 13 14 14 16 13 13 19/32 and 5/8 12 13 15 16 17 17 18 20 16 17 23/32 and 3/4 15 16 18 19 21 21 22 24 20 20 (a) Withdrawal capacities are based on the duration of load factor of 1.6 for wind applications. Adjustments for wet service and temperature are normally not required for attachment to the wood structural panel nailable sheathing. (b) For ring -shank nails, the withdrawal capacities (W) are based on specific gravities (G) of 0.70 in accordance with APA TT-039 and W = 1380 GI-5 D Co t, where: W = Withdrawal capacity (Ibf), G = Specific Gravity, D = Nail diameter (in.), Co = Duration of load factor (1.6 for wind loads), and t = wood structural panel thickness (in.). (c) Fasteners shall be long enough to fully penetrate wood structural panel sheathing by at least 1/4 inch. (d) For wood screws, the withdrawal capacities (W) are based on specific gravities (G) of 0.45 in accordance with APA TT-051 and W = 2850 GI D Co t, where: W = Withdrawal capacity (Ibf), G = Specific Gravity, D = Nail diameter (in.), Co = Duration of load factor (1.6 for wind loads), and t = wood structural panel thickness (in.). (e) For smooth -shank, screw -shank, and vinyl siding nails, the withdrawal capacities (W) are based on specific gravities (G) of 0.40 in accordance with APA TT-039 and W = 1380 GI-1 D Co t, where: W = Withdrawal capacity (Ibf), G = Specific Gravity, D = Nail diameter (in.), Co = Duration of load factor (1.6 for wind loads), and t = wood structural panel thickness (in.). (f) Vinyl siding nails shall have a head of at least 3/8 inch in diameter. 49 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. 11360P • ©2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction FIGURE 10 APA STURD-I-WALL (Horizontal Lap Siding Installation)t°I Building paper or other code -recognized weather -resistive barrier required Leave 1/8" spacing and caulk vertical joints unless otherwise recommended by siding manufacturer APA RATED SIDING (lap siding), maximum width 12". z Minimum headlap 1". 6" minimum clearance, siding to grade 1-1/2"-wide starter strip, thickness to match lap siding -1 ' (a) For engineered shear wall segments or wall bracing requirements, use APA Rated Sheathing for wall sheathing under lap siding (see Figure 12). Other methods permitted by model building codes for braced wall segments may also be used. FIGURE 11 APA RATED SIDING (PANEL SIDING) OVER WOOD STRUCTURAL PANEL SHEATHING Building paper or other code -recognized weather -resistive barrier required K APA RATED SIDING panels applied over sheathing 6" minimum clearance, siding to grade 1/8" spacing is recommended at all edge and end joints unless otherwise indicated by panel manufacturer Panel siding or APA RATED SHEATHING meets code requirement for wall bracing FIGURE 12 APA RATED SIDING (LAP SIDING) OVER WOOD STRUCTURAL PANEL SHEATHING APA RATED SHEATHING meets code requirement for wall bracing Building paper or other code -recognized weather -resistive barrier required "e APA RATED SIDING (lap siding), maximum width 12". Minimum headlap 1 ". Siding joints, if staggered may occur away from studs with nailable sheathing . 6' minimum clearance, siding to grade Leave 1/8" spacing and caulk vertical joints, unless otherwise recommended by siding manufacturer 1-1/2"-wide starter strip, thickness to match lap siding - 50 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA—THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction TABLE 23 APA RATED LAP SIDING APPLIED DIRECT -TO -STUDS OR OVER STRUCTURAL SHEATHINGM(b)(') Minimum Maximum Wind Speed (mph) Minimum Nail Performance Shank Diameter(d) Category Fastener Spacing Lap Siding Width Wind Exposure Category (in.) Lap Siding (in.)(*) (in.) B C D 6 130 110 100 0.113 3/8 6 8 110 90 85 12 85 NP NP (a) Table is based on wind pressures acting toward and away from (c) Hot -dip galvanized nails are recommended for most siding applica- building surfaces, at 30-ft height in wall Zone 5 (corners) with tions, see Siding Fasteners section on page 48 for more information. smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and Section R301.2 of the 2009 IRC, Stud specific gravity = 0.42. (d) See Table 5, page 14, for nail dimensions. (b) Recommendations of siding manufacturer may vary. (e) Fastener spacing at top edge of lap siding. TABLE 24 APA RATED SHEATHING APPLIED DIRECT-TO-STUDSM(b) Minimum Panel Nail Spacing Maximum Wind Speed (mph) Minimum Nail(c) Wood Minimum Shank Minimum Structural Panel Wind Exposure Category Diameter Penetration Panel Span Performance Wall Stud Edges Field (in.) (in.) Rating Category Spacing (in.) (in. o.c.) (in. o.c.) B C D 24/0, Wall-16 and 3/8 16 6 12 110 90 85 0.113 1.5 Wall-24 24/16, 12 110 100 90 7/16 16 Wall-24 6 6 150 125 110 12 130 110 105 0.131 1.75 24/16, 7/16 16 6 6 150 125 110 Wall-24 24 or less 6 12 110 90 85 (a) Panel strength axis parallel or perpendicularto supports. Three-ply (c) See Table 5, page 14, for nail dimensions. plywood sheathing with studs spaced more than 16' on center shall' be applied with panel strength axis perpendicular to supports. (b) Table is based on wind pressures acting toward and away from building surfaces, at 30-ft height in wall Zone 5 (corners) with smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and Section R301.2 of the 2009 IRC, Stud specific gravity = 0.42. REVIEWED FOR CODE COMPLIANCE ST. LUCIE COUNTY SOCC 51 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction A11A Panel Wall Sheathing APA RATED SHEATHING meets building code wall sheathing require- APA APA APA menu for wind pressures and wall bracing. Even when foam Or other nonstructural sheathing is used, APA RATED SHEATHING corner brae- RATED SHEATHING 2410 WOIN SPAMIG NSPAMIG RATED SHEATHING 24116 8MFoaMONG RATED SHEATHING STRUCTUMI 32116 in panels (Fig14) of the same thickness meet code wall bracinp g 1' TTD b requirements. Installation recommendations are given in Figure 13 and Table 24. EXPDSBREI THICKNESSOJUIN. 000 P.M. AI�ATI. B PoSOCAUEGM EXPOSURE1 THICKNESS QhA IN. 000 - W,(.� Aga `�Po77711CACM $MFCRSPAaMU EXP08URE1 THICKNESS OA51 IN. Boo �PoIMCA NK(a Recommended wall sheath- ing spans with brick veneer or masonry are the same as those for panel sheathing (see Table 24). See Figure 15 for installa- tion recommendations. Panel recommendations for preframed wall sections are the same as for built -in -place walls. Note: To minimize the potential for panel buckling, gluing of wall sheathing to framing is not recom- mended, except when recommended by the adhesive manufacturer for wall sheathing that already has been permanently protected by siding. FIGURE 13 APA PANEL WALL SHEATHING 1/8" spacing is Building paper recommended or other code - at all edge and recognized end joints unless weather - otherwise indicated '' resistive by panel " a barrier manufacturer APA RATED SHEATHING APA RATED applied with SHEATHING strength axis applied with parallel to strength axis ° studs across studs(,) Siding Filler strip if required' b :<, (a) Check local building codes for blocking requirements between studs for braced or engineered "`" 6" minimum shear wall segments, when wall sheathing' �'" clearance, is installed horizontally across studs. \ siding to grade FIGURE 14 APA PANEL CORNER BRACING Supports 16" or 24" o.c. Any wal l sheathing Min. 3/8 Performance Category APA RATED r SHEATHING nailed to studs \N with 6d common nails spaced 6" o.c. along panel edges and 12" o.c. at intermediate supports' 'See Table 5 for nail dimensions , For additional information on wall bracing, ' see Introduction to Wall Bracing, Form F430. FIGURE 15 BRICK VENEER OVER APA PANEL SHEATHING Building paper or other code -recognized weather - resistive barrier 1" air space required Brick veneer or masonry "Weep holes" logo in bottom course every 24" APA RATED SHEATHING Extend flashing up behind weather -resistive barrier at least 6" Hold panel edge 1/2" above base flashing 52 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA—THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction APA Sheathing Under Stucco Greater stiffness is recommended for wall sheathing when stucco is to be applied. To increase stiffness, apply the long panel dimension or strength axis across studs. Blocking or a plywood cleat is recommended at horizontal joints. Blocking is required for shear wall and wall bracing applications. For panel recommendations applied horizontally or vertically, see Table 25. Siding Joint Details The siding j oint details in Figure 17 are based on the use of APA trademarked siding. Nailing of wood structural panel siding along both edges of shiplap joints ("double nailing"), as shown, is required for shear walls or those wall segments that must meet bracing requirements. Double nailing is recommended for all other applica- tions as well to provide maximum wall strength and moisture protection. Where caulks or joint sealants are indicated, consider the various types available such as urethane, plasti- cized acrylic latex, butyl and polysulfide. Check with the manufacturer of the caulk or sealant to determine suitability for the intended application and compati- bility with coatings and other building materials such as vinyl and aluminum. In some cases, a foam backer rod or other type filler material may be used behind the sealants as recom- mended by the manufacturer. For best results in other cases, apply caulking to framing at panel edges before installing the siding panel; or apply a bead of caulk along the panel edge before installing the next panel. A 1/8-inch space is recommended at all edge and end joints unless otherwise indicated by panel manufac- turer. If caulk is to be used, also check with caulk manufacturer for recommended edge spacing. Nails through battens or other wood trim must penetrate at least 1 inch into studs. Nail panel siding 6 inches D.C. along edges and 12 inches o.c. at intermediate supports. To prevent staining of siding, use hot -dip galvanized, aluminum, or other nonstaining nails as described on page 48. Siding is often fully exposed to weather and thus has increased susceptibility to elevated moisture conditions. Although siding will periodically experience moisture contents above the threshold value needed to support d d b d 'd' d t h oo 1 histo TABLE 25 RECOMMENDED THICKNESS AND SPAN RATING FOR APA PANEL WALL SHEATHING FOR STUCCO EXTERIOR FINISH APA Rated Sheathing(b). Stud Minimum Spacing Panel Performance Minimum (in.) Orientational Category Span Rating Horizontal(c) 3/8 24/0 16 7/16(d( 24/16 Vertical 15/32(°), 1/2(e) 32/16 Horizontal(c) 7/16 24/16 24 Vertical 19/32(^), 5/8(^) 40/20 (a) Strength axis (typically the (c) Blocking recommended between long panel dimension) studs along horizontal panel joints. perpendicular to studs for (d) Structural I Rated Sheathing (OSB). horizontal application; or parallel to studs for vertical (e) OSB or 5-ply/5-layer plywood. application. (b) Recommendations apply to all -veneer plywood or oriented strand board (OSB) except as noted. FIGURE 16 STUCCO OVER APA PANEL SHEATHING APA RATED SHEATHING Two layers of � building paper required' Self -furring metal lath Stucco s Metal bead Note: *International Building Code requires two layers of grade D paper for stucco over wood -based sheathing. ecay, woo - ase st tng pro uc s ave a g ry of performance because they dry below this threshold value before decay can initiate. If trim is installed around siding, be sure that it doesn't trap moisture or reduce the drying ability of the wood. Trim that is applied incorrectly can lead to long- term moisture accumulation that causes decay. Apply flashing or other means of protection over end grain of siding to minimize water absorption. 53 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction FIGURE 17 TYPICAL PANEL SIDING JOINT DETAILS (Note: Water -resistive barrier [building paper or house wrap] is required behind siding.) VERTICAL WALL JOINTS Buff Shiplap Vertical Batten —Siding Reverse Board and Batten T1-11 & Channel Groove Batten Treat panel edges with Use ring -shank water repellent nails for the Note: battens, ap lied Nailingof both p panel edges along shi la oint is near the edges p g g shiplap l in two staggered rows recommended. The "double nailing" is required when wall segment must meet wall bracing or engineered shear wall requirements. HORIZONTAL WALL JOINTS Butt & Flash _ Gap 1/8" min. Siding Blockin (flatwise or edgewise Flashin (galv. or aluminum Lap Siding (APA Sturd-l-Wall) Lap siding (typ.) Lap sidin Caulk— Caulk (typ. Lap Siding Blockin (flatwise or edgewise Lap top panel over bottom panel Building paper Caulk Shiplap Siding �Blockin (fl.tlwiisedgewise Shiplap joint HORIZONTAL BELTLINE JOINTS (For multistory buildings, when conventional lumber floor joists and rim boards are used, make provisions at horizontal joints for shrinkage of framing, especially when applying siding direct to studs.) Jog Exterior Stud Line Band Board Over Panel Filler Band Board In Relief plate Fa Tiding im Board — ruble top plate - Siding (4' x 8') Alum. or galy. flashing —Up to 1 /2" gap _ when using conven- tional lumber floor & rim joists 0 band board '--- Filler Siding (4' x 8') WINDOW DETAILS (For window details, see Build A Better Home: Walls, Form A530.) Siding - Band board trim -Galy. 'Z' flashing alv. spikes or bolts (countersink) ----Rim Board -Double top plate Plastic pipe spacer (2" to 6" dia.) 54 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction APA. Rated Siding Patterns and Grades APA RATED SIDING, including 303 plywood siding, is available in a wide variety of surface textures and patterns. For descriptions of siding surface patterns and thicknesses, refer to APA Product Guide: APA Performance Rated Sidings, Form E300. Actual dimensions of groove spacing, width and depth may vary with the manufacturer. Where the characteristics of a particular wood species are desired, specify by grade and species preference: In order to help specifiers select the most appropriate siding appearance for any particular job, APA 303 ply- wood sidings are also identified by a face grading system. There are four basic siding classifications within the system — Special Series 303, 303-6, 303-18 and 303-30. Each class, as shown in Table 26, is fur- ther divided into grades according to categories of repair and appearance characteristics. Finishing Plywood for Exterior Exposure Care and Preparation Plywood should be stored and handled with care to avoid dam- aging before finishing. Storage in a cool, dry place out of sunlight and weather is best. If left out- doors, straps on bundles should be TABLE 26 APA 303 SIDING FACE GRADESM 303 Series Type of Patch Plywood Siding Grades Wood Synthetic 303-OC Not permitted Not permitted 303-OL Not applicable for overlays 303-NR Not permitted Not permitted 303-SR Not permitted Permitted as natural -defect shape 303-6-W Limit 6 Not permitted 303-6-S Not permitted Limit 6 303-6-S/W Limit 6 — any combination 303-18-W Limit 18 Not permitted 303-18-S Not permitted Limit 18 303-18-S/W Limit 18 — any combination 303-30-W Limit 30 Not permitted 303-30-S Not permitted Limit 30 303-30-S/W Limit 30 — any combination (a) All panels except 303-NR allow restricted accordance with panel grades, 303-OC minor repairs such as shims. These and being most restrictive and 303-30 being such other face appearance charac- least. Multiple repairs are permitted only teristics as knots, knotholes, splits, etc., on 303-18 and 303-30 panels. Patch size are limited by both size and number in is restricted on all panel grades. loosened or cut and the plywood covered. Allow good air circulation to prevent moisture condensation and possible mold growth. Edge Sealing Moisture enters the end grain of plywood or other wood -based products faster than through the surface. Consequently, edges and ends of APA RATED SIDING panels or lap siding should be sealed. Although edge sealers are not necessar- ily moisture -proof or permanently durable, they help to minimize sudden changes in moisture content in the siding, due to weather. APA RATED SIDING may be edge sealed at the factory. If the siding is not factory -sealed, it can be sealed quickly at the job site while the panels or lap siding pieces are still in a stack. Edges or ends cut during construction should be resealed. Siding to be finished with a semitransparent or solid -color stain can be edge sealed with a liberal application of a paintable, water-repellent sealer. If the siding is to be painted, apply sealer to edges using the same paint primer that will be used on the surface. Horizontal edges, particularly lower drip edges of siding, should be carefully edge -sealed because of their greater wetting exposure. 55 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • 02011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction Pinisbing APA RATED SIDING may be finished with a variety of products such as semi- transparent stains, solid -color stains or paint systems. The recommended finishes depend on the type of siding product, and whether it has an overlaid surface. Oil -based, semitransparent stains may be used on certain veneer -faced siding prod- ucts as detailed in Table 27. Solid -color stains may be used on most APA RATED SIDING products and usually provide better protection. In general, however, best overall performance on APA RATED SIDING products can be achieved with an all -acrylic latex paint system. For overlaid siding, any top-quality exte- rior house paint system formulated for wood performs satisfactorily. Solid - color stains may also -be used on overlaid sidings, although some manufacturers rec- ommend only acrylic latex formulations. For specific recommendations on fin- ishing OSB siding products, consult the siding manufacturer. TABLE 27 APA 303 SIDING FINISHING RECOMMENDATIONS PAINTS Minimum 1 303 Series STAINS primer plus 1 Plywood Siding Semitransparent Solid Color topcoat Grades (oil) (oil or latex)I0 (acrylic latex) 303-OC (b) (b) (b) 303-OL Not Recommended (d) (b) 303-NR (b) (e) (e) 303-SR (c) (e) (e) 303-6-W (b) (b) (b) 303-6-S (c) (b) (b) 303-6-S/W (c) (b) (b) 303-18-W (c) (b) (b) 303-18-S (c) (b) (b) 303-18-S/W (c) (b) (b) 303-30-W (c) (b) (b) 303-30-S (c) (b) (b) 303-30-S/W (c) (b) (b) (a). Except for overlaid panels, use a stain- (d) Some panel manufacturers recom- resistant primer with light-colored latex mend only acrylic latex formulations. stains, since the wood extractives may Consult the manufacturer's cause a discoloration of the finish. recommendations. (b) Recommended with provisions given (e) Only acrylic latex formulations are in text. recommended when solid -color stains (c) Should not be finished with semitrans- or paint systems are applied over parent stain unless specifically recom- open voids. mended by the panel manufacturer. Table 27 provides a summary of finishing recommendations for APA 303 Siding face grades. For complete information, refer to APA Product Guide: Performance Rated Sidings, Form E300. Semitransparent Stains (oil -based only) Oil -based semitransparent stains emphasize grain patterns, texture and natural characteristics in the wood. They may be used on plywood face grades 303-OC, 303-NR and 303-6-W. It is the only finish recommended for use over brushed plywood. Other 303 face grades should not be finished with semitransparent stains unless specifically recommended by the panel manufacturer. Solid -Color. Stains (oil or all -acrylic latex) An opaque or solid -color stain obscures color differences in the wood and between repairs and surrounding wood. This is often a satisfactory finishing system, therefore, where semitransparent stains are unsuitable. Wood grain is also muted with solid -color stains but wood surface textures usually remain evident. When in question, the finish should be applied to a representative sample in order to demonstrate the finished appearance. Solid -color stains are particularly recommended for grades 303-6-S and 303-6-S/W, as well as 303-18 and 303-30 with any type of patch. 56 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA - THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction Paints (all -acrylic latex) Top-quality acrylic latex house paint systems are recommended for all APA Rated Sidings, except brushed plywood. If house paint is used on plywood siding, an all -acrylic latex paint system consisting of at least one stain -blocking prime coat and an all -acrylic latex topcoat is recommended. For extractive staining woods, some house paint systems uti- lize an oil -alkyd primer. Others use up to two coats of a stain -blocking acrylic latex primer. These latter systems help to reduce face -checking and generally offer superior performance. A paint finish tends to mask the textured plywood surface more than either semitransparent or solid -color stains. On the other hand, a top-quality acrylic latex paint sys- tem provides the most durable finish. Grade 303-OL may be finished with any top-quality exterior paint system — primer and companion topcoat — formu- lated for wood. Field Application of Finish Proper surface preparation is important for good performance of finishes on any surface. Remove dirt and loose wood fibers with a stiff nonmetallic bristle brush. Mildew may be removed with a solution of 1/4 part household bleach to 3/4 part warm water. Be sure to rinse thoroughly after application of bleach. Finishes should be applied as soon as possible after installation of the siding. Weathering of unprotected wood can cause surface damage in as little as two to four weeks. Apply finishes during favorable weather conditions. As a rule of thumb, finishes should not be applied when the outside air temperature is expected to drop below 500 F (100 Q within 24 hours for latex finishes, or 400 F (5° Q for oil -based finishes. However, recommendations of individual manufactur- ers may vary and should always be followed. Wood surfaces should be clean and dry, although extremely dry surfaces should be dampened slightly when applying latex finishes. Use only top-quality finishes and application equipment. Finishes should be applied according to the spread rates recom- mended by the manufacturer. Textured surfaces may require up to twice as much finish as smooth surfaces. The first coat should be applied by brush. If spray equipment is used to apply the finish, then the finish should be either back -brushed or back -rolled while it is still wet. Subsequent coats of finish may be applied by any conventional means. Interior Paneling APA Rated Siding panels lend themselves to a number of decorative surface treatments for attractive interior paneling and accent walls. (See Figures 18 and 19.) Such treatments include saw -textured, brushed, embossed and grooved. Let APA panels acclimatize to room temperature and humidity conditions for several days prior to attachment to the wall. This can be accomplished by placing the panels on edge with space between each panel to allow air to circulate freely over both sides. Preservative treatment of furring or studs is recommended when they are attached to masonry or con- crete exterior walls and to any uncured concrete wall. Also, in these instances, install a 4-mil polyethylene vapor retarder between the paneling and the furring or studs and insulated exterior walls. Support and nail spacing recommendations are given in Table 28. Recommendations apply to all species groups. TABLE 28 INTERIOR PANELING Panel Nail Size Maximum Nail Spacing (in.) Performance Maximum Support (Use casing or Intermediate Category Spacing (in.) finishing nails)III Panel Edges Supports 1/4 16M 4d 6 12 5/16 161b1 6d 6 12 11/32 - 1/2 24 6d 6 12 19/32 - 3/4 24 8d 6 12 Texture 1-11 24 8d 6 12 (a) Can be 20 inches if strength axis of paneling is across supports. (c) See Table 5, page 14, for nail dimensions. (b) Can be 24 inches if strength axis of paneling is across supports. 57 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction FIGURE 19 PANELING EXISTING INTERIOR WALLS Block all unsupported edges Install 1x2 furring strips — horizontal and/or vertical with nails into studs, expansion bolts, concrete nails, powder -actuated fasteners, or adhesive as necessary. Use treated furring strips if in contact with concrete or block walls. Leave 1 /32" spacing at panel edges Use vapor retarder on either side of furring with concrete or block walls Panel Backing Wood structural panels are excellent backing for wall coverings such as rare hardwoods, vinyl surfaces and decorative fabrics. Panels with Performance Categories smaller than 15/32 should be applied with strength axis perpendicular to studs and with 2x4 blocking at horizontal edges. Thicker panels may be applied with strength axis parallel to studs. For thin coverings subject to telegraphing of underlying surface texture, only sanded plywood is recommended. Plywood panels should have C-Plugged or better faces. Use 6d nails spaced 6 inches on center at panel edges and 12 inches on center at intermediate supports. A 1/16-inch space should be left between panels. Where moisture may be present, use nonstaining nails and either Exposure 1 or Exterior type panels. A 1/4-inch clearance is recommended at the bottom edge of the panels. Wood Structural Panel Wall Bracing and Shear Walls Wood structural panel wall bracing and shear walls are used to resist racking forces caused by lateral loads from wind or seismic events. Wall bracing and shear walls serve the same purpose, to resist wall -racking forces, but they have distinct differences as explained on page 60. While all of the wall systems presented here will provide sufficient wall bracing strength under normal conditions in residential and light -frame construction, engineered shear walls may be desirable or required in areas of the country with frequent seismic activity or high wind loads. Shear walls are also inte- gral to commercial and industrial construction. 58 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA - THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction TABLE 29 ALLOWABLE SHEAR (POUNDS PER FOOT) FOR APA PANEL SHEAR WALLS WITH FRAMING OF DOUGLAS-FIR, LARCH, OR SOUTHERN PINEM FOR WIND(b)I1Ildl(0M OR SEISMIC(l)Idlle1191 LOADING Panels Applied Over 1/2" or 5/8" Panels Applied Direct to Framing Gypsum Sheathing Minimum Minimum Nominal Nail Nail Size Nail Size Panel Penetration (common or Nail Spacing at (common or Nail Spacing at Thickness in Framing galvanized Panel Edges (in.) galvanized Panel Edges (in.) Panel Grade (in.) (in.) box)(,) 6 4 3 20) box) 6 4 3 20) 3/8 2309) 3600) 4609) 6100) APA 7/16 1-3/8 8d 2550) 3950) 50518 67001 10d 280 430 5500) 730 STRUCTURALI grades 15/32 280 430 550 730 15/32 1-1/2 10d 340 510 66501 870 — — — — 5/16 or 1/4(k) 180 270 350 450 180 270 350 450 1-1/4 6d 8d APA RATED 3/8 200 300 390 510 200 300 390 510 SHEATHING; APA 3/8 2200) 320111 410111 53001 RATED SIDINGImI 7/16 1-3/8 8d 2400) 3509) 450111 58591 10d 260 380 4900) 640 and other APA grades except 15/32 260 380 490 640 species Group 5 15/32 310 460 60001 770 — — — — — 1-1/2 10d 19/32 340 510 66501 870 — — — — — APA RATED Nail Size Nail Size SIDINGImI and (galvanized (galvanized other APA grades casing) casing) except species 5/161k1 1-1/4 6d 140 210 275 360 8d 140 210 275 360 Group 5 3/8 1-3/8 8d 160 (a) For framing of other species: (1) Find specific gravity for species of lumber in the AF&PA National Design Specification (NDS). (2) For common or galvanized box nails, find shearvalue from table above for nail size for actual grade. (3) Multiply value by the following adjust- ment factor: Specific Gravity Adjustment Factor = [1 - (0.5 - SG)), where SG = specific gravity of the framing. This adjustment shall not be greater than 1. (b) For wind load applications, the values in the table above shall be permitted to be multiplied by 1.4. (c) All panel edges backed with 2-inch nominal or wider framing. Install panels either horizontally or vertically. Space nails maximum 6 inches o.c. along intermediate framing members for 3/8-inch and 7/16-inch panels installed on studs spaced 24 inches o.c. For other conditions and panel thicknesses, space nails maximum 12 inches o.c. on intermediate supports. Fasteners shall be located 3/8 inch from panel edges. (d) Where panels applied on both faces of a wall and nail spacing is less than 6 inches o.c. on either side, panel joints shall be offset to fall on dif- ferent framing members, or framing shall be 3-inch nominal or thicker at adjoining panel edges and nails on each side shall be staggered. (e) Galvanized nails shall be hot -dip or tumbled. (f) For shear loads of normal or permanent load duration as defined by the AF&PA NDS, the values in the table above shall be multiplied by 0.63 or 0.56 respectively. (g) In Seismic Design Category D, E, or F, where shear design values exceed 350 pounds per lineal foot, all framing members receiving edge nailing from abutting panel edges shall not be less than a single 240 310 410 10d 160 240 3100I 410 3-inch nominal member, or two 2-inch nominal members fastened together to transfer the design shear value between framing members. Wood structural panel joint and sill plate nailing shall be staggered in all cases. See IBC orAMPA Special Design Provisions for Wind and Seismic (SDPWS) for sill plate size and anchorage requirements. (h) See Table 5, page 14, for nail dimensions. (i) Framing at adjoining panel edges shall be 3-inch nominal or wider, and nails shall be staggered where nails are spaced 2 inches o.c. Check local code for variations of these requirements. (j) Allowable shear values are permitted to be increased to values shown for 15/32-inch sheathing with same nailing provided (1) studs are spaced a maximum of 16 inches on center, or (2) panels are applied with long dimension across studs. (k) 3/8-inch or APA RATED SIDING 16 oc is minimum recom- mended when applied direct to framing as exterior siding. (1) Framing at adjoining panel edges shall be 3-inch nominal or wider, and nails shall be staggered where 1 Od nails (3' x 0.148') having penetration into framing of more than 1-1/2 inches are spaced 3 inches o.c. Check local code for variations of these requirements. (m)Values apply to all -veneer plywood APA RATED SIDING panels only. Other APA RATED SIDING panels may also qualify on a proprietary basis. APA RATED SIDING 16 oc plywood may be 11/32 inch, 3/8 inch or thicker. Thickness at point of nailing on panel edges governs shear values. 59 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • 0 2011 APA-THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG Wall Construction Wall Bracing Wall bracing is typically a part of conventional prescriptive construction as found in 2009 International Building Code (IBC) Section 2308 or the International Residential Code (IRC) Chapter 6. Wall bracing is prescribed in a how-to format, and braced walls generally do not require hold down devices or have significant nailing requirements. Usually, there is no engineering required when using wall bracing since the "solution" is prescribed. For structures or portions of them that do not meet the prescribed construction parameters in the IBC or IRC, engineered design is required. Meeting the bracing requirements is easy when using wood structural panel wall sheathing because of its inherent strength. More information is available at www.wallbracing.org and in the following APA publications: ■ Introduction to Wall Bracing, Form F430 ■ Brace Walls with Wood, Form G440 Shear Walls The engineered version of wall bracing is a shear wall. Shear walls are designed by an engineer to resist the specific forces determined by engineering analysis. Shear walls have specific design values depending on their construction, fas- tener spacing, fastener size, sheathing thickness and framing species. Table 29 shows the Allowable Stress Design values for single -sided sheathed wood structural panel shear walls. Shear walls are also permitted to be designed to account for openings and with both sides of the wall sheathed. They usually require hold downs to resist overturning of wall segments, as shown in Figure 20. More information on designing with shear walls is available in the APA publication Design/Construction Guide: Diaphragms and Shear Walls, Form L350. Either APA RATED SHEATHING or all -veneer plywood APA RATED SIDING (and other APA RATED SIDING panels that qualify on a proprietary basis) can be used in shear wall design. The data presented here give maximum shears for walls with APA RATED SHEATHING, with plywood APA RATED SIDING installed directly to studs (APA Sturd-I-Wall), and with panels applied over gypsum sheathing for walls required to be fire -rated from the outside. FIGURE 20 SHEAR WALL HOLD-DOWN ANCHOR Shear wall overturning moments may be transferred by a fabricated steel bracket such as this. Regular foundation bolts may be all that is required in some cases depending on engineering analysis. APA RATED SHEATHING or APA RATED SIDING 303 Studs k Fasteners to framing, size as required. „ ;4 Hold-down anchor` Treated sill plate Flashing to separate i siding from concrete ;. Bolt to foundation Concrete foundation APA RATED SHEATHING 2410 aOEO FOR SPACING EXPOSUREI THICKNESS 0.3M IN. 000 STRUCTURALIRATED OUPNRAOU94W MWAW Pam@ WEATNNa 8 3MCATE�W�RI'� APA RATED SHEATHING 32116 a=FOR SPACOIG EXPOSUREI THICKNESS OAS1 IN. 000 eM0E CO PRMU V W12CATE00RY APA APA RATED SHEATHING RATED SHEATHING 32116 40120 BMFORSPACWO a=FORSPAmlO EXPOSUREI EXPOSUREI THICKNESS OAS1 NL THICKNESS CA78IN. 000 000 — Pabia BNFATNaNa �i PRP U HUM" Pt M. CIKATMO � PRP.IU Kam 60 1 ENGINEERED WOOD CONSTRUCTION GUIDE • FORM NO. B360P • © 2011 APA—THE ENGINEERED WOOD ASSOCIATION • WWW.APAWOOD.ORG APA RATED SIDING 24oc GROUP 1 SMFORSPAC010 EXTERIOR THICKNESS OA51 IN. {� 000 VPISSM '49 G Additional Information ADDITIONAL INFORMATION About APA — The Engineered. Wood Association APA — The Engineered Wood Association is a nonprofit trade association of and for structural wood panel, glulam timber, wood I joist, structural compos- ite lumber, and other engineered wood product manufacturers. Based in Tacoma, Washington, APA represents approximately 150 mills throughout North America, ranging from small, independently owned and operated companies to large integrated corporations. Always insist on engineered wood products bearing the mark of quality — the APA or APA EWS trademark. Your APA engineered wood purchase is not only your highest possible assurance of product quality, but an invest- ment in the many trade services that APA provides on your behalf. The Association's trademark appears only on products manufactured by mem- ber mills and is the manufacturer's assurance that the product conforms to the standard shown on the trademark. For panels, that standard may be the Voluntary Product Standard PS 1-09 for Structural Plywood, Voluntary Product Standard PS 2-10, Performance Standards for Wood -Based Structural -Use Panels or APA PRP-108 Performance Standards and Qualification Policy for Structural -Use Panels. Panel quality of all APA trademarked products is subject to verification through APA audit. The APA or APA EWS trademark appears only on engineered wood products manufactured by members of APA. The mark signifies that the manufacturer is committed to a rigorous program of quality verification and testing and that products are manufactured in conformance with an APA or national standard such as ANSI/ AITC A190.1, Standard for Structural Glued Laminated Timber; ANSI/APA PRP 210, Standard for Performance - Rated Engineered Wood Panel Siding; APA PRI-400, Performance Standard for APA EWS I joists; ANSI/APA PRR 410, Standard for Performance -Rated Engineered Wood Rim Boards; or with a manufacturer's building code evaluation report or APA Product Report(www.apawood.org/ProductReports). APRs services go far beyond quality testing and inspection. Research and promotion programs play important roles in developing and improving construction systems using wood structural panels, glulam, I joists, and structural composite lumber, and in helping users and specifiers to better understand and apply engineered wood products. For more information, please see the back cover. Engineered Wood Construction Guide APA offers a comprehensive set of services and tools for design and construction professionals specifying and using engineered wood products and building systems. If you're looking for detailed product information, training material, or technical assistance, APA can help. im* www.apawood.org, APA's website, is your link to in-depth design and building support, including a library of more than 400 publications available for instant pdf download or hard -copy purchase. mi* help@apawood.org or (253) 620-7400 is your connection to the APA Product Support Help Desk. Staffed by specialists who have the knowledge to address a diverse range.of inquiries related to engineered wood, the Help Desk can answer your questions about specification and application of APA products. Tap into Affs extensive knowledge and. resources. ■ Training materials and assistance, including Wood University, APAs online portal for engineered wood education, located at www.wooduniversify.org ■ Information to protect homes against damaging moisture infiltration through the Build a Better Home and Free From Mold programs, including guides and details for builders at www.buildabetterhome.org and an inspection regimen for homeowners at www.freefrommold.org ■ More than 200 downloadable CAD details, found at www.apacad.org ■ Field representatives in many major U.S. cities and Canada who can answer questions about APA trademarked products For a list of APA and APA EWS publications, download the APA Publications Index, Form B300, at www.apawood.org/publications. APA — THE ENGINEERED WOOD ASSOCIATION HEADQUARTERS 7011 So. 19th St. Tacoma, Washington 98466 0 (253) 565-6600 • Fax: (253) 565-7265 DISCLAIMER The information contained herein is based on APA — The Engineered Wood Association's continuing programs of laboratory testing, product research, and comprehensive field experience. Neither APA, nor its members make any warranty, expressed or implied, or assume any legal liability or responsibility for the use, application of, and/or reference to opinions, findings, conclusions, or recommendations included in this publication. Consult your local jurisdiction or design professional to assure compliance with code, construction, and performance requirements. Because APA has no control over quality of workmanship or the conditions under which engineered wood products are used, it cannot accept responsibility of product performance or designs as actually constructed. Form No. E30V/Revised August 2011 /1200 APA 'ahoo Mail - Florida Product Approval https://mail.yahoo.com/d/folders/l/messages/AHd8EEBNPQIW.. Florida Product Approval From: Help Desk (help@apawood.org) To: arolon1028@yahoo.com Date: Thursday, September 23, 2021, 3:16 PM EDT Dear Sir, Dear Sir, 2017 Florida Building Code accepts APA 303 Plywood Siding without additional product approval. Reference Chapter 23 of the code for application requirements. Section 2314.4 The following standards, as set forth in Chapter 35 of this code, are hereby adopted for the design and quality of wood members and their fastenings: Section 2314.4.3: APA The Engineered Wood Association #1. APA Design Construction Guide, Residential and Commercial, Form E30 (now Engineered Wood Construction Guide) #10. Performance Standards and Policies for Structural -Use Panels: PRP-108 #11.303 Siding Manufacturing Specifications, B840 Best regards, Shanin Davis Product Support Specialist Wood Products Support Help Desk APA 253-620-7400 (phone) 253-565-7265 (fax) help@—apawood.org apawood.org www.APAwood.org Disclaimer Neither APA nor its members make any warranty, expressed or implied, or assume any legal liability or responsibility for the use, application of, and/or reference to opinions, findings, conclusions, or recommendations included in this communication. Consult your local jurisdiction or design professional to assure compliance with code, construction, and performance requirements. Because APA has no control over quality of workmanship or the conditions under which its member's products are used, APA cannot accept responsibility of product performance or designs as actually constructed. of 1 9/23/2021, 3:26 PD