Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
Product Approval
F� tea° T -s.-.,.,; ^.a.rr.,.a,r ,.,.,.-;,. a°,.. ° °..,. . °.,._,..y „0.s .. w...-... .,.:...:, a,v>.._. o_.ai' ', .':' '" t,.etia�...; >.:"- h'.:•'�e+.>. -,a°' r ,$'�'"e ,'9' -.�,s"".ba?A' �<Fa*n.a`;::n ,x q;&;r%'. . A > 'e qq �4" r: u`fF'°'r :°t° .� .� -ga •x .�b.. "4i �' .� 1F*- o:8;.yI .� f^' Y�.. �e *: �:'d::p :� .v,�'.. ,. ,.,,.:., e °.r r• :',,s^rb o-•°.K�,K�° m. ,.� ° s°�4, T°.�, ..Ys�,, a,°`q �'`�adi,$:+�' z:. +;a,*, °� '�` .�n:.y;'.$` °� `r siq� °ck¢ .�:,°+�'. _ �^, ar r s r K°.= <a• •� d.. t � ;� .°¢ �$ 6 .,'i�*,, :bg..s<e r .�-:r°t ,:s sv a¢a°i°,a `>�•°.G �y ''7^s` ,Poi ="P;£ t a �a y,p' Kfi• �•, s°F'°e `P°: �`k. �.,, ..man '�,,�,. .$e.. °s�.a,... ,t :an w• .S. � :<k.y,# +° �� 3;aA ,x:, �..,�,,. ;,. '+!'v'x�, mar 4.q .�" #Po 7' ..4 ,.«„<,° =a�.°, � •a., re,. 5.. ::..$°. ,ae°a,.- t „� a�u:.e .xc:. k a,r :*$,x m s$°sa, >::+•A xay. ° ,p yaa�°,"+a *;4 a v: •0. r,"� ° * : :� °, '�. �..< � � ,°� ,: ,�.-. -�a. ..... r Y°a*�.. •,°°_^;.�<,��,s .. ° �n -. .�', .., i $8w ..., ° 93!.f''�ee^"Y' °oyp°. X�. ,aA ���• $� ° °� � $ � - _ Rm>^ Y4. �� ° n p a �e. •6qe ,� � >° '§ �4^h { `YAC rs 6� b +u� ° ..� #csp s,{ ;!4 �'g•rte � �° 7 Via, �8„ ."�,* �_ B ry � ..��� ,� _,.: Sia, =;$.r•. ¢a. °t:*^ 4 4"8� Y "y ,.�., 'ti, �b; 'dl;�%$! $'+• - a.zn.. „y ,...° s'r - F ...=i� .. s g ';..°�43�'s*. � "a,"°". •;qc< ,yrs•. ova 4.Rs°°K 8-% '. ,t'd°° a-.. -„�'. it r.;z,i�'+F°A�.: r� o'. n'rv4,yy. ,. °:.9 .._; ¢ .. s _� ° Y =. .= K: .° .:,:. 2 ., s' : a,s°°° wwe W, a .^,R 9�. '�4° A. "'S H �g .'y:•..: ."?°w:Y ';. .. ... a, -' Mea <.. ., Y4 ,.•..> s. :. ., ., ,Y<x:re:i*".. em <. :a-. .ifS _,+ .. ,a§z, °, M', 9,'g-aec _., , e '�Y�, ;-�. :,°"�.,`.. �,t:s, ^..,, .. a ,.„g.�, . . �ya'� ,:-.�.” , .. ..+• ';,k..�..,¢<., ,arv.,K �.i. r ,,... ,R r � �o:,,*r , .�,sa §�$� ..w� w°`q.` ':++' N*„; �, �., «. ., <. e,,i. Y k .;.;a F 'i9:,„'�.', :.:`k. ,°N ;..°$ 4`•P;,_.•Sri`�, .k'p <g<g 'Safi°• aK W�k,.° ,�3a, K S�,.�} � i� °<�.„.y9,'a Y' .:$ 1 $!w�'y'M.. L `a$ ba,..„ y�A 2 *S ,." �, :°.63e °3�p § �.y'°"�&F4� P Fees•' r 4µ•yy#, ° r %`;,y 're s��. a'Y ' � l..R,..4� , ae.:..o. ,..aa?4, ,..'gp -+m :.:�. � s.,.a �• Vie. ��. °.�°° 2. L, �A t � R'.Y- e d• `# awe � !. b B �'. i. Engineered Wood Construction Guide WCOND5 Y 0 u r The atur'al Choice O Fn Engineered wood products are a good choice for the environment. They are 0 W manufactured for years of trouble-free,dependable use.They help reduce waste w .by decreasing disposal costs and product damage,Wood is a renewable resource that is easily manufactured into a variety of viable products. ME 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 r� !2 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. oThat 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. 240-4_Consny tiu n_for_Reseuch_cm—Re_newabl Ind istrial-Materials (CORRIM) study gave scientific validation to the strength of wood as a z 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 a o long lifespan-CORRIM found that wood was better for the environment than steel or concrete o 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. 0 o ® Manufacturing wood is energy efficient. z Wood products made up 47 percent of all. Percent of Percent of Material Production Energy Use oindustrial raw materials manufactured in the U Wood 47 4 United States,yet consumed only 4 percent of the Steel 23 48 o energy needed to manufacture all industrial raw Aluminum 2 8 materials,according to a 1987 study. 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. a Q Wood: It's the natural choice for the environment, for design and for stronp � b b, lasting construction. ° NOTICE: o - The recommendations 3 in this guide apply only o THiN� to products that bear w RpSEO SHi A the APA trademark. 3 GRSPP Onlyproducts bearing EXP w SQEpF0SU*A the APA trademark •gt1CKN 000 as, are subject to the quality ua PRP•1U Association's �p55512CA GQ;Y G •7 o auditing program. 2 I ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.E30V•©2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWW.APAWOOD.ORG Engineered Wood Construction Guide 3 INY „z - z ... , ,iIV Vj 8 +w' " - F y, 110 c APA engineered wood products are used in a wide range of construction applications.Time-tested panel products ' are used in traditional wood-frame construction and in combination Mth other engineered,wood products and systems.For low in-place cost,versatility,and superior perfonnance,engineered wood systems are simply hard to beat. --This-guide From ARA is designed as a reference manual x w for both residential and commercial construction. It T C_c)ntaIns l n-tc_l_dlae—bt tiaation on APA Rerlorm:tnc_�_ 1 Rated panels,glulam,]-joists,structural composite + Lumber,specification practices, Door,wall and roof.17 systems,diaphragms and shear walls, fire-rated systems; `' w, and methods of finishing. If what you want to know about engineered wood RE R s � construction systems isn't fully explained here;chances4. are it is in one of our many other publications.Titles cited 1 s �x ,•m � %�� ��y. } throughout this publication can be downloaded or ordered from the APA website,at wvvtiv.apawood.org.Or,for b individual assistance with specific application questions or r problems,contact the APA Produce Support Help Desk at (253)620-7400. s t � S x t� 3 I ENGINEERED WOOD CONSTRUCTION GUIDE-FORM NO.E30V•©2011 APA—THE ENGINEERED WOOD ASSOCIATION=WWW.APAWOOD.ORG r f3 , K r. s W .,e $' . ry� W � �� ��.8 � �� .� awl •�(��, }� � <� ®BALL CONSTRUCTOOK 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. - --APS Sturd-1 WhI10 -- --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 0465. TABLE 19 FASTENING APA RATED SIDING(PANEL)APPLIED DIRECT-TO-STUDS OR OVER NONSTRUCTURAL S HEATH IN G(°)(6)1,)(d)to) Minimum NailM Panel Nail Spacing Maximum Wind Speed(mph) ...............................__........................ ..................................................._.....................................I............_...._._ ........................................................................................_............._ Shank Penetration Wall Stud Intermediate Wind Exposure Category APA Rated Diameter in Framing Spacing Edges(a) Supports ----------- ___-- Panel Siding (in.) (in.) (in.o.c.) (in.o.c.) (in,o.c.) 8 C D 3/8 Performance 16 6 12 110 90 90 Category 6 140 120 110 APA MDO 1 5 12 90 NP NP GENERAL 6 130 110 100 APA Rated Siding0.113 24 6 16 oc 16 6 12 125 105 90 6 140 120 110 2.0 .........................__............_............._ _.........- ... ---12 --._.......... ...........-----------"---'— APA Rated Siding 1000 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 I ENGINEERED WOOD CONSTRUCTION GUIDE"FORM NO.B360P•©2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWWAPAWOOD.ORG Wall Construction TABLE 20 APA RATED LAP SIDING APPLIED DIRECT-TO-STUDS OR OVER NONSTRUCTURAL SHEATHINGt°)16)(401®) ..........................—-------—---------........................ ...................................................................................................... Minimum Naillf) Maximum Wind Speed(mph) Minimum Wall Stud Wind Exposure Category Shank Diameter Penetration in Performance Spacing Lap Siding ...................I ................................... ..................... (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 (e)Supported panel joints shall occur approximately along the center- Section R301.2 of the 2009 IRC,Stud specific gravity=0,42. 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 over two 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 -MAXIMUMSTUD-SPA-ClN APA RAaEC!:SMIN"AMEL)—APPLIED-DIRECT-TO--STUDS-OR-STRUCTURAL-SHEATHINGF7—.— 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 APARated Siding ............................................................................................................................................................................... ............................. 24 oc 24 24 ................................................................................................................................................................................................................................................................................................................................— (a)Stud spacing may be 24"o.c.for veneer-faced siding panels. TABLE 21 B APA RATED SIDING(PANEL)APPLIED TO STRUCTURAL SHEATHING(-)(b)(.)(d)(.) Minimum Nail(Nol Panel Nail Spacing Maximum Wind Speed(mph) Wall Stud Intermediate Wind Exposure Category APA Rated Shank Diameter Spacing Edges(N 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 GEN EPAL - 6 125 105 90 I APA Rated Sidin0.120 ring shank g 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 (e)Maximum stud spacing shall be in accordance with Table 21A. Section R301.2 of the 2009 IRC,Stud specific gravity=0.42. (f) Ring shank nail shall be used. (b)Recommendations of siding manufacturer may vary, (c) For use as wood structural panel wall bracing,the minimum fas- (g)See Table 5,page 14,for nail dimensions. (h)Supported panel joints shall occur approximately along the center- supports tener spacing of 6"o.c.at panel edges and 12"o.c.at intermediate shall be sufficient. line of framing with a minimum bearing of 1/2".Fasteners shall be located 3/8"from panel edges. 46 I ENGINEERED WOOD CONSTRUCTION GUIDE-FORM NO.13360P-C 2011 APA—THE ENGINEERED WOOD ASSOCIATION-WWWAPAWOOD.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 FIGURE 8 RATED SIDING RATED SIDING ; APA STURD-I-WALL(vertical Panel Installation) LAP 303.18-SIW i _ - ......._............................................._.......... 303.30-SIW _ 160C GROUP 1 160C GROUPI SM FOR SPACWG Building EXTERIOR EXTERIOR gUlg paper or code--- -- i THICIGNESS 0AS1 IN. THICKNESS 0.578 IN. i recognized weather-resistive PS 71T1.1®000® Boo_ barrier required behind siding ; !1 PRP-108 HU99 DVA4 Z PRP-los Huo-UN40 V 102CATEGORY �./ 1332 CATEGORY { Panel siding meets code requirements for wall bracing 7 RATED SIDING RATED SIDING LAP 240C GROUP - 16oc 5¢EOFORSPACINGOR APA RATED SIDING panels. THICKNESS IN. THICKNESS 05578 IN. All edges supported by framing 000 ®000® or blocking. P0.108 HUD•UU4 PS 1.09 i !� ANSUAPAPRP-210 nPRP-IDS HUM 40 I CJ 102CATEGORY w/ 19132CATEGORY { i I 77 i 1/8"spacing is recommended ---— at all edge and end joints unless --- otherwise indicated by panel manufacturer I 6"minimum clearance,------ -- � siding to grade I 47 I 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- i FIGURE 9 ing applications. For best APA STURD-I-WALL(Horizontal Panel Siding Installation) performance, stainless steel or aluminum nails should Building paper or other code-recognized See Tables 19,20 and be considered. APA tests j weather-resistive barrier 21 for maximum also show that electrically stud spacing or mechanically galvanized Battens at 4'or 8'o.c. Panel siding meets steel nails appear satisfac- to conceal butt joints at -j / code requirements panel ends.Nails through for wall bracing tory when plating meets or battens must penetrate exceeds thickness require- studs at least 1". E) Seal panel edges ments of ASTM A641 Class 2 i APA RATED SIDING 2x4 blocking at coatings,and is furtherpro- panels(nailing as required horizontal joints tected by yellow chromate for vertical installation) Nc coating.Note that galvanized 1/8"spacing is fasteners may react under we recommended at all conditions with the natural edge and end joints unless otherwise extractives of some wood spe- i indicated by panel cies and may cause staining if manufacturer_ __ W left unfinished.Such staining 6"minimum clearance, T can be minimized if the sid-—siding_to_grade- ing is finished in accordance yrithAPAre-comme-ndaticus or if the roof overhang protects the siding from direct exposure to moisture and weathering. Wood Structural Panel Sheathing as a Maid 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: I.Nominal 1-inch boards with studs 16 or 24 inches o.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.G.).-. 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 o.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•©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 SHEATHINGN Ring-Shank Nailsl6lt°1 Withdrawal Loads(Ibf) Wall Sheathing Nail Diameter{in.) Performance0.097 ._......__...._..........._ 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................... --................---- -----...._.__.._..............----................__......................................_...._ 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 ScrewsMi")Withdrawal Loads(Ibf) -__-_ - -- Wall Sheathing Screw Gauge/Diameter(in.) -- Performance #6 #7 #8 #9 #t1{} #12 #14 Category 0.138 0.151 0.164 0.177 0.19 0.216 0.242 - ....._...._........ -..........._._...._...._..---- -.-..-------------..__.._....................... - - - _-- -- - B-_ - 48 52 __57____61 66 - - 75 - 84_ - _............._._ ...............................-----._..._........._....-----._._.._......................._.................._...._........._......................._.._..__..._..____.___...._...._............................_._...................................__..__._...- 7/16 56 61 66 72 77 87 98 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 Natisi°1{Qua Smooth-Shank and Screw-Shank Nailstllisl 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 ._._......2.........---._........3_._......................1.5._.._—��......._................_1.7...................._.... ...........................$---20............ ...................1.6...............................-17....- 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 noilable 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 G'-5 D CD t,where:W=Withdrawal capacity(Ibf),G=Specific Gravity,D=Nail diameter(in.), Ca=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 G2 D Cc,t,where:W=Withdrawal capacity(Ibf),G=Specific Gravity,D=Nail diameter(in.), Ca=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 G1.1 D Cp t,where:W=Withdrawal capacity(Ibf),G=Specific Gravity,D=Nail diameter(in.), Ca=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.B360P•©2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWW.APAWOOD.ORG NRE Wall Construction FIGURE 10 APA STURD-I-WALL(Horizontal Lap Siding Installation)(,) ---..__............---..—.............................. ---.-................_.. -....-.._.... 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". Minimum headlap 1". 6"minimum clearance,siding to grade - --- --- --- --- 1-1/2"-wide starter strip,thickness to match lap siding (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-- APA RATED SIDING panels applied over sheathing 6"minimum clearance,siding to grade p 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 —L ........._._..---------................................------..__._.._.... --.................. ................... 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 =- 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 I ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.B360P•©2011 APA-THE ENGINEERED WOOD ASSOCIATION-WWWAPAWOOD.ORG r4 Wall Construction TABLE 23 APA RATED LAP SIDING APPLIED DIRECT-TO-STUDS OR OVER STRUCTURAL SHEATHING(Omw -._._.......................................--------......__........_...._......................_.................._....--------......._..__..................................-----------..................................__......................................._-....---------.._........................................... . Minimum Maximum Wind Speed(mph) Minimum Nail Performance Shank Diameter(") Category Fastener Spacing Lap Siding Width .........Wind Exposure Category (in.) Lap Siding (in.)(N) (in.) 8 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 (d)See Table 5,page 14,for nail dimensions. Section 8301.2 of the 2009 IRC,Stud specific gravity=0.42. (b)Recommendations of siding manufacturer may vary. (e)Fastener spacing at top edge of lap siding. TABLE 24 APA RATED SHEATHING APPLIED DIRECT-TO-STUDS(°)16) Minimum Panel Nail Spacing Maximum Wind Speed(mph) Minimum Nail(,) 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, 7/16 16 6 -- -1 - ..............................._..._._................__ ........... Wall-24 6 150 125 110 —.................- — - 1.2. ................................._130 110 105 0.131 1.75 24/16, 7/16 .-_._16 6 6 150........--...__1.25.........................110............ Wall-24 —---._._......_.__. ..........................I.............._.__. 24 or less 6 12 110 90 85 .................................................---.............._......................................................................................................................................................................................................._...................__.----------.......................................................................................................... (a)Panel strength axis parallel or perpendicular to 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. 51 I ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.6360P=©2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWW.APAWOOD.ORG Wall Construction APA Panel Fall Sheathing APA RATED SHEATHING meets building code wall sheathing require- A PA APA APA mems for wind pressures and wall bracing.Even when foam or other RATED SHEATHING RATED SHEATHING RATED SHEATHING nonstructural sheathing is used,APA RATED SHEATHING corner brac- 2410 24116 ST UCTUR I SIZED FOR SPACING SMFORSPACING 32116 ing panels(Figure 14 of the same thickness meet code wall bracing EKPES O.35RE1 THICKNESS 0A1 SIZEO FORSPACING g ) g THICKNESS 0.3541N. THICKNESS OA151N. EKPOSUREI 000® ®000® THICKNESS 0.451 IN. requirements.Installation recommendations are given in Figure 13 and Ps,.,.sNEAT UNG PS biO SHEATHING ®600 PRP 1C9 HUO-USidO �i PR IC8 NUO-UN�30 SPS,-09 C-0 PRP-100 Table 24. E3' CIS CATEGORY TO6CATEGORY v i5 CATEGORY Recommendedwall sheath- _...—._....- -- --.................................................._..---....._ -....__......__....._.__................................_..__...........— ing spans with brick veneer or FIGURE 13 masonry are the same as those APA PANEL WALL SHEATHING ._.................................................---._.........._..................................................................................................._..................................................................................................................................._ for panel sheathing(see Table 24). See Fi ure 15 for installa- 1/8"spacing is Building paper g recommended or other code- tion recommendations. at all edge and recognized end joints unless weather- Panel recommendations for otherwise indicated resistive by panel s barrier preframed wall sections are the manufacturer - = I same as for built-in-place walls. APA RATED SHEATHING Note: To minimize the potential APA RATED applied with for panel buckling, gluing of wall SHEATHING _ strength axis sheathing to framing is not recom- applied with Iparallel to mended,except when recommended strength axis r V - 4 studs by the adhesive manufacturer for _across_ studs',,) f wall sheathing that already has been I permanently protected by siding. Siding ng -- –if required- (a)Check local building ' codes for blocking requirements between studs for braced or engineered 6"minimum shear wall segments,when wall sh in < clearance, is installed horizontally across studs. siding to grade FIGURE 14 FIGURE 15 APA PANELORNER BRACING RACING BRI CK VENEER OVER APA PANEL SHEATHING Supports 16" Building paper or other nized weather- code-reco or 24"o.c. 9 resistive barrier Any wall V airspace\ required sheathing z' Brick veneer r or masonry Min.3/8 —� Performance Category APA RATED SHEATHING -— nailed to studs 'Weep holes alfa with bd common t in bottom nails spaced y course , APA RATED 6"o.c.along panel every 24" f SHEATHING edges and12"O.C. at intermediate ;; Extend flashing up behind —� supports* weather-resistive barrier at least 6" 'See Table 5 for nail dimensions L}, l e panel d a 1/2" 5. P 9 For additional information on wall bracing, above base flashing see Introduction to Wall Bracing,Form F430. 52 I ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.B360P•0 2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWW.APAWOOD.ORG Wall Construdion APA Sheathing Under Staacco 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 joint details in Figure 17 are based on the use of APA trademarked siding:Nailing of wood structural TABLE 25 panel siding along both edges of shiplap joints("double RECOMMENDED THICKNESS AND SPAN RATING FOR APA nailing"),as shown,is required for shear walls or those PANEL WALL SHEATHING FOR STUCCO EXTERIOR FINISH wall segments that must meet bracing requirements. APA Rated Sheathingl4 Double nailing is recommended for all other applica- Stud Minimum Spacing Panel Performance Minimum tions as well to provide maximum wall strength and (in.) OrientationM Category Span Rating moisture protection. 3/8 24/0 16 Vertical 7/161d1 24/16 Where caulks or joint sealants are indicated,consider 15/32(,),1/2(,) 32/16 the various types available such as urethane,plasti- 24 Horizontal)°I 7/16 24/16 .........................._............._...._.............................................._..... cized acrylic latex,butyl and polysulfide.Check with Vertical 19/32M,5/8lel 40/20 the manufacturer of the caulk or sealant to determine (a)Strength axis(typically the (c) Blocking recommended between long panel dimension) studs along horizontal panel joints. suitability for the intended application and compati- perpendicular to studs for (d)Structural I Rated Sheathing(OSB). horizontal application;or bility with coatings and other building materials such parallel to studs for vertical (e)OSB or 5-ply/5-layer plywood. application:--- as vinyl and aluminum. I -- - (b)Recommendations apply to all-veneer plywood or come-case¢_a-foam-bRcke=d-or-otheLtvpe-Her oriented strand board(OSB)-- — - ---- — - except as noted. --- -- - - 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 FIGURE 16 along the panel edge before installing the next panel. STUCCO OVER APA PANEL SHEATHING A 1/8-inch space is recommended at all edge and end APA RATED SHEATHING joints unless otherwise indicated by panel manufac- turer. If caulk is to be used, also check with caulk Two layers of r manufacturer for recommended edge spacing. Nails building paper required* �� through battens or other wood trim must penetrate at least 1 inch into studs.Nail panel siding 6 inches Self-furring metal lath o.c. along edges and 12 inches o.c. at intermediate supports.To prevent staining of siding,use hot-dip Stucco galvanized,aluminum,or other nonstaining nails as Metal bead described on page 48. Note: International Building Code g 4, Siding is often fully exposed to weather and thus has requires two layers of increased susceptibility to elevated moisture conditions. grade D paper for stucco over wood-based sheathing. -"_-- Although siding will periodically experience moisture Check local building code and applicator contents above the threshold value needed to support for specific requirements. decay,wood-based siding products have a good history -- _..----....------------.......--_...._..__................................__...._._.___..____. 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 Butt 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 battens,applied ' Note: near the edges Nailing of both panel edges along shiplop joint is in two staggered rows recommended.The"double nailing'is required when wall segment must meet wall bracing or engineered shear wall requirements. VERTICAL INSIDE&OUTSIDE CORNER JOINTS Butt&Caulk Corner Board Lap Joints Lap Siding(APA Sturd-1-Wall) Siding Siding - Lap siding(typ) Lap siding k,�Caulk Caulk \ Caulk (typ-) Building - - paper / Blocking Building Corner boards (typ•) paper Caulk HORIZONTAL WALL_ JOINTS - - - - Butt&Flash Lap Shiplap Gap 1/8"min. Siding Siding Siding J Blocking Blocking _ Blockin (flatwise or edgewise} (flatwise or edgewise) t (flotwise or edgewise Flashin ----- Lap top panel Shiplap joint (galy.or aluminum over bottom panel 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 Floor plate Siding (4'x 8') I ~'"" __..............Siding Alum.or galy. flashing Band board trim d, Siding - -Up to 1/2"gap ____---Galt'.'Z'flashing when using conven- Galy.spikes or bolts Rim Board tional lumber floor (countersink) &rim joists t �_`� --Rim Board - i - 2x10 band board I>ZTDouble top plate Filler ' Double top plate ` '-Siding(4'x 8') .___...._..............___.........._. Plastic pipe spacer WINDOW DETAILS (2"to 6"dia.) (For window details,see Build A Better Home:Walls,Form A530.) 54 I ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.B360P-©2011 APA-THE ENGINEERED WOOD ASSOCIATION-WWW.APAWOOD.ORG t Wall Construction APA hated 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 ther..........................................................._..................................................................._.................................................................................................._:........._._.._....................... ....................—_. most appropriate siding appearance TABLE 26 for any particular job,APA 303 ply- APA 303 SIDING FACE GRADESM wood sidings are also identified by a 2303 Series Type of Patch face grading system.There are four Plywood Siding basic siding classifications within .......... .Grades Wood Synthetic the system - Special Series 303, 303-OC Not permitted Not permitted 303-OL Not applicable for overlays 303-6, 303-18 and 303-30. Each 303-NR Not permitted Not permitted class,as shown in Table 26,is fur- 303-SR Not permitted Permitted as ther divided into grades according to _. natural-defect shape ... _........_............_..._.._.....---.._...._............_..............._..--_..._. _..._..................._..--- categories of repair and appearance 303-6-W Limit 6 Not permitted characteristics. 303-6-5 Not permitted Limit 6 303-6-S/W Limit 6-any combination ..........................-- ---.._........................._......-._................_..._..........................._.—_._.................................................._...........__.........................................._._ Finishing Plywood 303-18-W Limit 18 Not permitted 303-18-S Not permitted Limit 18 Cmc Exf-eri6A1'Exposure 303-18-S/W Limit 18-any combination Care and Preparation 303-30-W Limit 30 _ Not permitted Plywood should be stored and 303-30-S Not permitted Limit 30 303-30-S/W Limit 30-any combination handled with care to avoid dam- _ - -- IorA11-panels-except-30"R-allow-restricted accordance-with-parreFgrades,-a03--OC— -aging before finishing. Storage in 1minor repairs such as shims.These and being most restrictive and 303-30 being a cool, dr lace out of sunlight such other face appearance charac- least.Multiple repairs are permitted only y I� li g teristics as knots,knotholes,splits,etc., on 303-18 and 303-30 panels.Patch size and weather is best. If left out- are limited by both size and number in is restricted on all panel grades. doors,straps on bundles should be .............................. 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. 551 ENGINEERED WOOD CONSTRUCTION GUIDE•FORM NO.B360P•0 2011 APA—THE ENGINEERED WOOD ASSOCIATION e WWN/.APAWOOD.ORG Wall Construction Finishing APA RATED SIDING may be finished with a variety of products such as semi- TABLE 27 transparent stains,solid-color stains or APA 303 SIDING FINISHING RECOMMENDATIONS ....-----.............I....................----........................................._...._....._..._..................-----...................................................---- paint systems.The recommended finishesPAINTS ._._._...........---.............._ depend on the type of siding product,and Minimum i STAINS whether it has an overlaid surface. 303 Series .............................................................._..................................-................._.........._- primer plus 1 Plywobd Siding Semitransparent Solid Calor topcoat Grades (oil) (oil or latex)(0 (acrylic latex) Oil-based,semitransparent stains maybe 303-OC (b) (b) (b) used on certain veneer-faced siding prod- 303-OL Not Recommended (d) (b) ucts as detailed in Table 27. Solid-color 303-NR (b) (e) (e) stains may be used on most APA RATED 303-SR (c) (e) (e) SIDING products and usually provide 303-6-W (b) (b) (b) better protection. In general, however, 303-6-S (c) (b) (b) best overall performance on APA RATED 303-6-S/W (c) (b) (b) 303-18-W (c) (b) (b) SIDING products can be achieved with an 303-18-S (c) (b) (b) all-acrylic latex paint system. 303-18-S/W (c) (b) (b) ..................................----.............................................-----..........-......................... 303-30-W (c) (b) (b) For overlaid siding,any top-quality exte- 303-30-S (c) (b) (b) rior house paint system formulated for 303-30-5/W (c) (b) (b) wood performs satisfactorily. Solid- (a)Except for overlaid panels,use a stain- (d)Some panel manufacturers recom- Color stains may also be used on overlaid resistant primer with light-colored latex mend only acrylic latex formulations. 5r stains,since the wood extractives may Consult the manufacturer's sidings,although some manufacturers rec- — cause a discoloration of the finish. recommendations. Ommend only acrylic later formulations. (b)Recommended with provisions given (e)Only acrylic latex formulations are in text. recommended when solid-color stains —€or-speeifi,c—reeemmend-at-i-ens--6n f;n ----(c)-Should-not-be-finished-wrfh-semitr(3ns- —or point-systems are_applied_ovar -parent-stain unless specifically recom- open voids. - ishing OSB siding products, consult the mended by the panel manufacturer. siding manufacturer. Table 27 provides a summary of finishing recommendations for APA 303 Siding face grades.For complete information,refer to APA Product Guide:Pel formance Rated Siciings,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 latera) 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 50°F(10°C)within 24 hours for latex finishes,or 40°F(5°C)for oil-based finishes.However,recommendations-of indiviTual manufactur- ers may vary and should always be followed.Wood surfaces should be clean and dry,although extremely dry surfaces s ould be dampened slightly when applying latex finishes. --- -- Use only-to p-quality_finishes and application equipment.Finishes should be applied accordingto o 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. i TABLE 28 INTERIOR----._.............._..._..........__..._.---.......................................................................................__..__....----._......._.....................----... .__................... --.---...._.......................------..._......................_...--- Panel Nail Size Maximum Nail Spacing(in.) Performance Maximum Support (Use casing or Intermediate CategorySpacing(in.) finishing nails)(0 Panel Edges Supports _.—_._..............__._.......----...._........._..........................._...................................................................._._............................................................................................................_.—._.__.—._................ —.—..........._.....—— 1/4 161°1 4d 6 12 5/16 16161 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 I ENGINEERED WOOD CONSTRUCTION GUIDE-FORM NO.B360P•0 2011 APA-THE ENGINEERED WOOD ASSOCIATION•WWW.APAWOOD.ORG t Wall Construction FIGURE 18 FIGURE 19 PANELING NEW INTERIOR WALLS PANELING EXISTING INTERIOR WALLS Block all i unsupported edges Leave 1/32" spacing at Install 1x2 furring strips � ��`� ponel edges horizontal and/or vertical F With nails into studs, r his f expansion bolts,concrete nails,powder-actuated fasteners,or adhesive as I necessary.Use treated furring ra I strips if in contact with r fconcrete or block walls. ' n # "a rKN. : Leave 1/32"spacing *� at panel edges i Use vapor retarder on either Note: side of furring with concrete � � If applied horizontally, "''` or block walls black all unsupported edges. 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 Zx–+blocking atorizonta-e gas: lhicicker panels inay be app>led–with strength axis parallel to studs. or - 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 I 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*)jd)(e)JfJ OR SEISMIC(c)(d)(a)(g)LOADING ..................... ............................................... .......... Panels Applied Over 1/2"or 518" Minimum Minimum Pane-Is-Applied lied D..irect to o Fro..m..i-Ing ............. Gypsum Shthin ..m oo- ..9........................--- 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)(h) 6 4 3 VJ box) 6 4 3 201 3/8 23001 36061 460u1 61061 ............................. ....................................-- APA .APA 7/16 1-3/8 8d 2550) 3950 5050) 6700) 10d 280 430 550(l, 730 STRUCTURAL I -- ._...._....._._..—_._....._................--- grades .........................................__grades 15/32 280 430 550 730 15/32 1-1/2 10d 340 510 6651Q 870 — — . ................................................................................................................................................................................ ................................. ................... ....................................—----- 5/16 or 1/01 180 270 350 450 180 270 350 450 .............................. 1-1/4 6d —-------.................................. 8d .................................... ............ APA RATED 3/8 200 300 390 510 200 300 390 510 SHEATHING;APA 3/8 2200) 3200) 41001 53001 RATED SIDING(m) 7/16 1-3/8 8d 24001 35001 45001 58501 10d 260 380 490(4 640 and other APA grades except 15/32 260 380 490 640 species Group 5 15/32 310 460 60010 770 — — — - ----- 19/32 1-1/2 10d 340 510 665(D 870 — ............................................................................. APA RATED Nail Size Nail Size _SIDINGM and (galvanized --(galvanized--- casing) casing) other APA grades ............................................ except species 5/16N 1-1/4 6d 140 210 275 360 _8d --- 140 210 275 360-- -Group-5 3/8 1-3/8 8d 160 240 310 410 __10d____160_ 240 310@ 410 ...................... (a)For framing of other species:(1)Find specific gravity for species of 3-inch nominal member,or two 2-inch nominal members lumber in the AF&PA National Design Specification(NDS).(2)For fastened together to transfer the design shear value between common or galvanized box nails,find shear value from table above framing members.Wood structural panel joint and sill plate for nail size for actual grade.(3)Multiply value by the following adjust- nailing shall be staggered in all cases.See IBC or AF&PA ment factor;Specific Gravity Adjustment Factor=[1-(0.5-SG)], Special Design Provisions for Wind and Seismic(SDPWS)for sill where SG=specific gravity of the framing.This adjustment shall not plate size and anchorage requirements. be greater than 1. (h)See Table 5,page 14,for nail dimensions. (b)For wind load applications,the values in the table above shall be (i) Framing at adjoining panel edges shall be 3-inch nominal or permitted to be multiplied by 1.4. wider,and nails shall be staggered where nails are spaced 2- (c)All panel edges backed with 2-inch nominal or wider framing.Install inches o.c.Check local code for variations of these requirements. panels either horizontally or vertically.Space nails maximum 6 inches (j) Allowable shear values are permitted to be increased to values o.c.along intermediate framing members for 3/8-inch and 7/16-inch shown for 15/32-inch sheathing with same nailing provided panels installed on studs spaced 24 inches o.c.For other conditions and (1)studs are spaced a maximum of 16 inches on center,or panel thicknesses,space nails maximum 12 inches o.c.on intermediate (2)panels are applied with long dimension across studs. supports.Fasteners shall be located 3/8 inch from panel edges. (k) inch or APA RATED SIDING 16 oc is minimum recom- (d)Where panels applied on both faces of a wall and nail spacing is less mended when applied direct to framing as exterior siding. 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 (1) Framing at adjoining panel edges shall be 3-inch nominal at adjoining panel edges and nails on each side shall be staggered, 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 (e)Galvanized nails shall be hot-dip or tumbled.. 0.148") are spaced 3 inches o.c.Check local code for variations (f) For shear loads of normal or permanent load duration as defined by of these requirements. the AF&PA NDS,the values in the table above shall be multiplied by (m)Values apply to all-veneer plywood APA RATED SIDING panels 0.63 or 0.56 respectively. only.Other APA RATED SIDING panels may also qualify on a (9)In Seismic Design Category D,E,or F,where shear design values proprietary basis.APA RATED SIDING 16 oc plywood may be exceed 350 pounds per lineal foot,all framing members receiving 11/32 inch,3/8 inch or thicker.Thickness at point of nailing on edge nailing from abutting panel edges shall not be less than a single panel edges governs shear values. Typical Layout for Shear Walls Load Y Framing Blocking Framing X' FN L-Shear wall boundary 59 I ENGINEERED WOOD CONSTRUCTION GUIDE-FORM NO.B360P-02011 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: •IntrodTuction to Wall Bracing,Form F430 m 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 14'alls;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 APA APA APA SHEAR WALL HOLD-DOWN ANCHOR RATED SHEATHING RATED SHEATHING RATED SIDING _..........._............._...............................................-_._.._.. 2410 32116 303.18-SM SIZED FOR SPACING SUOFORSPACING 240C GROUP Shear wall overturning moments may be transferred by a fabricated EXPOSTHICKNESS 0.354 1N. THICKNESURE I IN. S¢EDSPACING EXTERIORsteel bracket such as this.Regular foundation bolts may be all that is 000— ®coo® THICKNESS 0.4SI IN. required In some cases depending an engineering analysis. STRUCTURALIRATED P51.09 coo PRP-108 000 DIAPHRAGHS-SHEAR WALLS �% YJ89 CATEGORY PSI49 PA m SHEATHING �PRP.108 HU0.UM ^�,,PRP-108 NU0.UM-t0 - G/ t=CATEGORY 318 CATEGORY APA RATED SHEATHING or APA RATED SIDING 303 �l-- ,a. Studs -_ _ j APA AMPA Fasteners to framing,�• RATED SHEATHING RING RATE40/20 INS size as required f.., S zvosus`IG SIZED FOR UREI THICKNESS 0.451 IN. THICKNESS 0.678 IN. Hold-down anchor 000® ®000 -. P81-00 SHEATHING PSZ-10 SHEATHING PRP408 HUD.UW40 FRP408 HUOJI6f-10 1SWCATEGORY 191SICATEGORY Treated sill plate L Flashing to separate - - --- siding from concrete Bolt to foundation Concrete foundation ........-- __............-...................................................................__._...---_...............................- ....- 60 I ENGINEERED WOOD CONSTRUCTION GUIDE a FORM NO.B360P•©2011 APA—THE ENGINEERED WOOD ASSOCIATION=WWW.APAWOOD.ORG Additional Information AODNTIONAL 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 TTacoma,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 engincered-wood-purchase is - --- � not only your highest possible assurance of produc-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"o`F`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/ RITC 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). - APAs services go far beyond duality testing and inspection.Research krid 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. q? �1 Engineered Wood Construction Guide APA offers a comprehensive set of services and tools for design and construction professionals specifying and 1 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. nn help@apawood.org or(253)620-7400 is your connection to the APA Product Support Help Desk.Staffed I 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 APA7s extensive knowledge and resources. m Training materials and assistance,including%rood University,APA's online portal for epgineered wood v education,located at www.wooduniversity.org •Information to protect homes against damaging moisture infiltration through the Build a Better Home and Free From Mold programs,including guides-and-derails-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 a. Field repres ntadves in many ma�S—r 17 5=cit csand Canada who can answer quest ons a out_i1P�l _. _ trademarked products For a list of APA and APA EWS publications, download the APA Publications Index, Form B300, at www.apawood.org/publications. a RPA—THE ENGINEERED WOOD ASSOCIATION HEADQUARTERS q 7011 So. 19th St.Tacoma,Washington 98466•(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. a u:! 3� Form No.E30V/Revised August 2011/1200 jy ;i AS AACPA1 GP r Plytanium®plywood exterior siding is an exterior-grade panel that is ideal for siding applications from new home construction and remodeling to do-it-yourself projects. Available Types&Sizes(Sized for 4'x 81) Length (Minimum) 7'-117/s'(2.435 m) Width (Minimum) 3'-117/8"1 m) Siding Types T1-11 Reverse Board&Batten (RB &B) No Groove Finish Rough sawn or scratch sand Groove Spacing T1-11 —4"on-center or 8"on-center RB&B—12"on-center Building Code Performance Categories,Panel Thickness • 11/32 CAT, 0.328"(8.33 mm) • 19/32 CAT, 0.578"(14.68 mm) Specifications Length/Width Tolerance +0,—'/is"(+0,—1.6 mm), based on 4'or 8'value Straightness Tolerance t'/,8"(t1.6 mm) Squareness Tolerance t'/a"(t3.2 mm) Primary Species Southern Yellow Pine Testing Agency APA°-The Engineered Wood Association Classification Exterior—Plywood suitable for repeated wetting and redrying or long-term exposure to weather and other conditions of similar severity. Code Fire Classification Class III or C Flame Spread Rating 75-200,smoke-developed index<450 Building Code Compliance PS 1-09 Other Information 0SUSTAINABLESURESINCertified Sourcing Forestry Certification Plytanium siding panels are made from Sustainable Forestry INITIATIVE wuw.sTprugram.org Initiative®(SFI11)certified responsible wood sources. SF140007 J Formaldehyde Emission Plytanium siding panels contain no added urea formaldehyde resins. Emission levels for certified PS 1 structural panels are exempt by the California Air Resources Board(CARB)in the Composite Wood Air Toxic Control Measure(ATOM)and phenolic bonded structural panels are exempt from testing or monitoring by HUD in the Manufactured Home Construction and Safety Standards. I;riy. GP Manufacturing Locations APA Mill Zip Harvest Location Number Code Radius Camden,TX 515 75934 90 miles Corrigan,TX 516 75939 90 miles Dudley, NC 348 28333 80 miles Emporia,VA 230 23847 40 miles Gurdon,AR 517 71743 60 miles Madison, GA 404 30650 100 miles Prosperity, SC 329 29127 80 miles Taylorsville, MS 282 39168 50 miles Georgia-Pacific Georgia-Pacific Wood Products 133 Peachtree St.,N.E. Plytanium and the Plytanium and Georgia-Pacific logos are trademarks owned by or licensed to Atlanta,GA 30303 Georgia-Pacific Wood Products LLC. Sustainable Forestry Initiative,SFI,and the SH logo are trademarks of Sustainable Fore Initiative,Inc. 800-284-5347 www.builditbetter.com 02013 Georgia-Pacific Wood Products LLC.All rights reserved.5/13 GP-TM Lit.Item#621670. I