Connector Solutions to Meet the Wall-Bracing Requirements of the ...

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Page 2 of 8Table 2: Embedded Strap-Style HoldownsHoldownMin Wood MemberThickness 2 (in.)Tension (lbs.) (DF/SP/SPF/HF) 3,4,5Midwall/CornerEndwallLSTHD8/LSTHD8RJ 3.5 2700 2230STHD10/STHD10RJ 3.5 4120 3145STHD14/STHD14RJ 3.5 5345 42101. Allowable loads have been increased for wind or earthquake with no further increase allowed.2. Post may consist of multiple members provided they are connected independently of the holdown fasteners.3. Tension values apply to uncracked concrete in wind and low-seismic regions (any structure in seismic designcategories A and B and detached one- and two-family dwellings in seismic design category C). For allowableload information for other applications, refer to current Wood Construction Connectors catalog.4. Tension values apply to minimum concrete strength, f’c of 2500 psi, and minimum stemwall width of 8". Forvalues with minimum stemwall width of 6" refer to current Wood Construction Connectors catalog.5. Refer to the current Wood Construction Connectors catalog for installation requirements.NailedPortionClear Span17" Max.Min. rebarlength is2 x l e¹⁄₂" Min.end distance2 x l e min. or 24"Typical STHD14Corner Corner Installation InstallationTable 3: Straight StrapsStrap2 x l e 2 x l eMin. rebar lengthTypical STHD14Midwall InstallationMidwall Installation½" Min. end distanceTypical STHD14End-Of-Wall Endwall InstallationFasteners Dimensions (in.) Capacity (lbs.)(Total) W L (DF/SP/SPF/HF)LSTA21 (16) 10d 1 1/4 21 1235LSTA30 (22) 10d 1 1/4 30 1640MSTA30 (22) 10d 1 1/4 30 1820(2) LSTA30 2 (44) 10d 1 1/4 30 3280(2) MSTA30 2 (44) 10d 1 1/4 30 36401. Allowable loads have been increased for wind or earthquake load durations with no further increase allowed.2. Double jack stud required; one strap installed per stud.3. Use half the nails in each member being connected to achieve the listed loads.4. 10dx1 1 ⁄2" nails may be substituted where 10d are specified at 100% of the table loads except where installed over sheathing.Min. rebarlength is 2 x l eRim Typical Joist STHD14RJInstallationRim Joist ApplicationLW¹⁄₂" Min.fromCornerT‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.LSTA and MSTA(Pilot holes not shown)

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Page 3 of 8Table 4: Sill Plate AnchorsAnchor Type Model Number Size (in.) Sill Plate SizeMinimum ConcreteEnd DistancePost-Installed 1 Titen HD THD50600H 2,3 1 ⁄2"x6" Single 2x 6"Titen HD THD50800H 2,3 1 ⁄2"x8" Single 3x or Double 2x 6"Cast-in-place MASA/MASAP 4 — Single 2x or 3x 4"1. Provide plate washers beneath the anchor head when required by code. TheSimpson Strong‐Tie ® BPS 1 ⁄2-3 meets section R602.11.1 requirements.2. Mechanically-galvanized anchors may be required by code when used with treated wood.Add ‘MG’ to model number for mechanically galvanized option. For additional information,visit www.strongtie.com.3. Minimum concrete edge distance required = 1 3 ⁄4".4. ZMAX ® (galvanized G185) coating may be required by code when used with treated wood.Add ‘Z’ to model number for ZMAX option.5. Minimum concrete strength, f’c = 2500 psi.4¹⁄₄"Embedment line(Top of concrete)4"3³⁄₈"MASATiten HD ®Common Wall-Bracing Methods and Code Sections Requiring Connectors and AnchorsThe following wall-bracing methods and code sections require connectors and/or anchors. Connector andanchor requirements appear in bold. Refer to Tables 1-4 for Simpson Strong-Tie ® product solutions.T‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.Intermittent Narrow Braced-Wall-Panel MethodsMethod ABW: Alternate Braced Wall PanelsSection R602.10.3.2Panels shall be supported directly on a foundation or onfloor framing supported directly on a foundation that iscontinuous across the entire length of the braced wall line.Table A – Holdown Forces for Alternate Braced Wall Panels (lbs.)(Based on 2009 IRC Table R602.10.3.2)Height of Braced wall panelAlternate Braced WallPanel Location8 ft. 9 ft. 10 ft. 11 ft. 1 12 ft. 1Minimum Sheathed Length2'– 4" ² 2'– 8" 2'– 10" 3'– 2"¹ 3'– 6"¹One-Story 1800 1800 1800 2000¹ 2200¹First Story of Two-Story 3000 3000 3000 3300¹ 3600¹1. Alternate braced wall panels in Seismic Design Categories D 0, D 1and D 2are limited to amaximum height of 10'.2. 8' Alternate braced wall panels in Seismic Design Categories D 0, D 1and D 2are limited toa minimum width of 2'– 8".Min. 3 /8" woodstructural panelsheathingMin. double 2x studsat each end on panelHoldown (standardor embed. style) perTable R602.10.3.2(both styles shownfor clarity) See TableA for load requirements.See Tables 1and 2 (pages 1-2) forSimpson Strong-Tieholdowns.Note: Foundation shall beconstructed per codeSheathed length(see mins. in Table A)For panel splice (if needed)adjoining panel edges shall meetover and be fastened to commonframing8d common or galvanized boxnails @ 6" o.c. for single storyor 4" o.c. for two stories alongpanel edges8d common or galvanized boxnails @ 12" o.c. in the fieldSimpson Strong-Tie 1 ⁄2" x 6" TitenHD ® Screw Anchor(2) 1/2" diameter anchor bolts perFigure R403.1.1 located between6" and 12" of each segment end.See Table 4 for Simpson Strong-TieoptionsMethod ABW: Alternate Braced Wall Panels

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Method PFH: Portal Frame with Holdowns Section R602.10.3.3Walls must be supported directly on a concrete foundation (not permitted on masonry foundations) andrequire additional foundation reinforcement.Extent of headerDouble portal frame (two braced wall panels)Extent of headerSingle portal frame (one braced wall panel)Page 4 of 810' - 0" max. heightFasten sheathingto header with8d common orgalvanized boxnails in 3" gridpattern at headerand 3" o.c. in allframing typ.Min. width = 16" forone-story structuresMin. width = 24" foruse in the first oftwo-story structures5/8" dia. anchor boltwith 7" min. embedmentNote: Foundation shall beconstructed per codeMin. 3" x 11.25" net headerSimpson Strong-Tie LSTA21Min. 1000 lb. strap opposite sheathingFasten top plate to headerwith two rows of 16dsinker nails at 3" o.c. typ.Min. 2 x 4 framing6' min. - 18" max.3/8" min. thickness woodstructural panel sheathingSimpson Strong-Tie LSTHD8Min. 1000 lb. embedded holdownSimpson Strong-Tie STHD14min 4200 lb. embeddedtie-down each end of panelMin. double2 x 4 postMethod PFH: Portal Frame with HoldownsFor a panel splice (if needed),panel edges shall be blocked,and occur within 24" ofmid-height. One row of typ.sheathing-to-framing nailingis required.Typical portalframe construction1/2" min enddistance typ10' - 0" max. heightMethod PFG: Portal Frame at Garage Door Openings (Seismic Design Categories A, B and C)Section R602.10.3.4Refer to Table 3 (page 2) in conjunction with Table B (page 5) for straps required due to pony wallsconstructed on headers.Fasten sheathing toheader with 8d commonnails in 3" gridpattern as shown and3" o.c. in all framing(studs, blocking, andsills) typ.Min. length based on4:1 height-to-lengthratio. For example:24" for 8' height.Wood structuralpanel strength axisSimpson Strong-Tie1/2" x 6" Titen HD ®Screw AnchorAnchor bolt perR403.1.6 typ.Extent of header (one braced wall segment )Min. 3" x 11.25" net headerFasten header to king studwith (6) 16d sinker nailsFor a panel splice (if needed), paneledges shall be blocked, and occurwithin 24" of mid-height. One row oftyp. sheathing-to-framing nailing isrequired in each panel.Min. (2) 2 x 4 typ.Simpson Strong-Tie LSTA21Min. 1000 lb. strap opposite sheathing2' min. - 18' maxSimpson Strong-Tie BPS 1/2-3Min. 21/2" x 21/2" x 3 /16" plate washer typ.Extent of header (two braced wall panels)No. of jack studs perTable R502.5 (1 and 2)Braced wall segmentper R602.10.4Top plate continuityper Section R602.3.2Side ElevationMin. 1000 lb.header-to-jackstrap at eachend of opening16d sinkernails in 2 rowsat 3" o.c.7/16" min. thicknesswoodstructural panelsheathingT‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.Note: Foundation shall beconstructed per codeMethod PFG: Portal Frame at Garage Door Openings in Seismic Design Categories A, B and C

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Continuous Narrow Braced Wall Panel MethodsPage 5 of 8Method CS-PF: Continuous Portal FrameSection R602.10.4.1.1Refer to Table 3 (page 2) in conjunction with Table B (page 5) for straps required due to pony wallsconstructed on headers.Over Concrete or Masonry Block FoundationExtent of header (one braced wall segment)Extent of header (two braced wall segments)SideElevationPonywallheightMin. 1000 lb. tensionstrap centered atbottom of headerT‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.12' - 0" Max. total wall height10' - 0" Max. heightFasten sheathingto header with 8dcommon nails in3" grid patternand 3" o.c. in allframing typ.Min. length basedon 6:1 height-tolengthratio. Forexample: 16" min.for 8' heightWood structuralpanel strength axisSimpson Strong-Tie1/2"x6" Titen HD ®Screw Anchors(2) Anchor bolts perR403.1.6Note: Foundationshall be constructedper codeOver Raised Wood Floor or Second Floor – Framing Anchor OptionMethod CS-PF: Continuous Portal Frame Panel ConstructionTable B – Tension Strap Capacity Required for Resisting Wind PressuresPerpendicular to 6:1 Aspect Ratio Walls – Exposure B and C (Based on 2009 IRC Table R602.10.4.1.1)Mimimum Wall StudFraming Nominal Sizeand Grade2x4No. 2 GradeMin. 3" x 11.25" net headerSimpson Strong-Tie LSTA21Min. 1000 lb. strap opposite sheathingFasten header to king studwith (6) 16d sinker nailsFor a panel splice (if needed), paneledges shall be blocked, and occur withinmiddle 24" of wall height. One row of 3"nailing is required at each panel edge.Min. (2) 2 x 4 typ.2 ft. min. – 18 ft. max. (finished width)Simpson Strong-Tie THD50600HAnchor bolt per R403.1.6 typ.Simpson Strong-Tie BPS 1/2-3Min. 2" x 2" x 3 /16"plate washer typ.Simpson Strong-Tie LTP4Framing anchors670 lb. uplift, 670 lb. lateralWood structural panelsheathing over approvedband joistExposure BExposure CMax. Pony Max. TotalMax. Opening Basic Wind Speed (mph)Basic Wind Speed (mph)Wall Height Wall HeightWidth (ft.) 85 90 100 85 90 100(ft.) (ft.)Tension Strap Capacity Req’d. (lbs.) Tension Strap Capacity Req’d. (lbs.)0 10 18 1000 1000 1000 1000 1000 10009 1000 1000 1000 1000 1000 12751 1016 1000 1000 1750 1800 2325 350018 1000 1200 2100 2175 2725 DR9 1000 1000 1025 1075 1550 25002 1016 1525 2025 3125 3200 3900 DR18 1875 2400 3575 3700 DR DR9 1000 1200 2075 2125 2750 40002 1216 2600 3200 DR DR DR DR18 3175 3850 DR DR DR DR4 129 1775 2350 3500 3550 2350 350016 4175 DR DR 4175 DR DR1. Select strap from Table 3 based on capacity required2. DR = Design required.3. Strap shall be installed in accordance with manufacturer’s recommendations.No. of jack studs per tableR502.5 (1 and 2)Braced wall segmentper R602.10.4Nail sole plate tojoist per tableR602.3(1)Sheathing filler ifneeded16d Sinker nails in2 rows at 3" o.c.Wood structural panelmust be continuousfrom top of wall tobottom of wall, orfrom top of wall topermitted splice area.3/8" min. thicknesswood structuralpanel sheathingNail sole plateto joist per tableR602.3(1)Approvedband joist

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Additional Applications that May Require ConnectorsPage 6 of 8Holdown Requirements for Continuously-Sheathed Braced Wall Panel ApplicationsSection R602.10.4.4• A 24" wood structural panel return (or 32" structural fiberboard return), as shown in Figures R602.10.4.4(1) andR602.10.4.4(2), must be provided at the ends of continuously sheathed, braced wall lines. A holdown device with amin. 800 lb. allowable tension load may be installed at the corner in lieu of the required return, as shown in FigureR602.10.4.4(3).• An exception to Section R602.10.4.4 allows for the first braced wall panel to begin up to 12'– 6" from the bracedwall line end in SDC A, B or C (8' in SDC D 0 , D 1 or D 2 ). Either full-height wood structural panels (24" minimum)constructed in accordance with Figure R602.10.4.4(1) must be provided at both sides of the corner or a holdowndevice with a min. 800 lb. allowable tension load may be installed at the end of the braced wall panel closest to thecorner, as shown in Figure R602.10.4.4(5).Corner detail perFiguire R602.10.4.4 (1)Clearopening heightCorner detail perFiguire R602.10.4.4 (1)Clearopening heightClearopening height= Qualified full-height bracing segmentsClearopeningheightBraced wall panels meeting minimum required length perSection R602.10.4.2 or R602.10.5 at both ends of braced wall line(all other framed portions of wall also sheathed)12'-6" max. – SDC A, B and C8'-0" max. – SDC D 0 , D 1 and D 2Simpson-Strong-Tie DTT2Z800 lb. capacity holdowndevice in lieu of corner returnClearopening heightSimpson-Strong-Tie DTT2Z800 lb. capacity holdown devicein lieu of corner returnClearopeningheightFigure based onR602.10.4.4 (3)Braced wall line withcontinuous sheathingwithout corner return panelFigure based onR602.10.4.4 (5)Braced wall line withcontinuous sheathing –First braced wall panelaway from end-of-wallline with holdownT‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.Braced wall panels meeting minimum required length perSection R602.10.4.2 or R602.10.5 at both ends of braced wall line(all other framed portions of wall also sheathed)= Qualified full-height bracing segments

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Narrow Bracing AlternativesIn areas where window or door openings do not provide enough space to fit thecode wall bracing options, consider using a code-listed shear wall product thatmeets the intent of the code while providing a narrow-wall solution, such as aSimpson Strong-Tie ® Strong-Wall ® shearwall (wood or steel).Refer to the Strong-Wall ® Shearwalls Prescriptive Design Guide for complete wallbracing replacement solutions, including anchorage.SteelStrong-Wall ®PanelPage 7 of 812" Min.Additional Bracing ConsiderationsOther elements can influence wall-bracing requirements, such as construction in higher seismic design categories,installations with stone and masonry veneer, and braced wall panels located at exterior walls supporting roof raftersor trusses.Braced Wall Panel LocationsSection R602.10.1.4• In SDC D 0 , D 1 or D 2 , braced wall panels must be located at each end of a braced wall line. An exception forMethod WSP braced wall panels allows a braced wall panel to begin no more than 8' from each braced wall line end,provided a minimum 24" panel is present on both sides of the corner in accordance with Figure R602.10.4.4(1),or the end of each braced wall panel closest to the corner shall have a holdown device installed with a minimumuplift capacity of 1,800 lbs. These options are shown in the figure below.T‐WALLBRACE12 1/12 exp. 12/31/15 © 2012 SImPSon STRong‐TIE ComPAny InC.Up to 8'0" max.Up to 8'0" max.Clearopening heightSimpson Strong-Tie DTT2Z1800 lb. capacity holdownMethod WSPbracing onlyClearopeningheightOR24"24"= Qualified full-height bracing segmentsUp to 8'0" max.Clearopening heightMethod WSPbracing onlyThis 24" wide segment does not countas bracing unless the building iscontinuously sheathed per R602.10.4.Figure based on Figure 602.10.1.4.1Braced wall panels at ends of braced wall lines inSeismic Design Categories D 0 , D 1 and D 2

TECHNICAL BULLETINConnector Solutions to Meet the Wall-Bracing Requirementsof the 2009 International Residential Code ®Braced Wall Panel Uplift Load PathSection R602.10.1.2.1• Where the net uplift value exceeds 100 plf, uplift framing connectors shall be installed at braced wall panels toprovide a continuous load path from the top of the wall to the foundation.• Refer to the current Simpson Strong‐Tie ® Wood Construction Connectors catalog for connector options to providethat continuous load path, where required.Wind Bracing Amount Reduction with 800 lb. HoldownSection R602.10.1.2• Table R602.10.1.2(1), Note i permits the required wind bracing length to be multiplied by 0.80 for several bracingmethods and story applications if min. 800 lb. holdown devices are attached to the stud at each end of each bracedwall panel.Page 8 of 8Sill AnchorageSection R403.1.6• Table 4 (page 3) provides information for postinstalled(Titen HD ® screw anchors) and cast-inplace(MASA mudsill anchors) anchors that are adirect 1:1 replacement for 1 ⁄2" diameter cast-in-placeanchor bolts embedded 7" into concrete that areused to anchor wood sill plates.• BPS 1 ⁄2-3 washers meet the additional SectionR602.11.1 plate washer requirements of allbuildings in SDC D 0 , D 1 or D 2 , and townhouses inSDC C. Testing shows that the MASA can be usedin lieu of code-required anchor bolts and squarewashers in high-seismic zones.• BPS 1 ⁄2-3 washers meet the plate washerrequirements for Methods PFG and CS-PF.Titen HD ®screw anchorRound-cut washeror a plate washer asrequired by code2x, 3x or(2) 2x Mudsill6" Min.Typical MASAInstallation in ConcreteTypical MASAPInstallation in ConcreteThis technical bulletin is effective until December 31, 2013, and reflects information available as of January 1, 2012.This information is updated periodically and should not be relied upon after December 31, 2013; contactSimpson Strong‐Tie for current information and limited warranty or see www.strongtie.com.©2012 Simpson Strong‐Tie Company Inc. • P.O. Box 10789, Pleasanton, CA 94588 T-WALLBRACE12 1/12 exp. 12/31/15800-999-5099www.strongtie.com