2012 IRC Simplified Wall Bracing 4-30 - Iccsafe
2012 IRC Simplified Wall Bracing Provisions4/28/2015If you need assistance please contact us at1-888-ICC-SAFE (422-7233), extension 33818IMPORTANT NOTICE: This Adobe Connect service includes a feature that allows audio and any documents and other materialsexchanged or viewed during the session to be recorded. By joining this session, you automatically consent to such recordings. If you donot consent to the recording, do not join the session. This webinar provides an explanation of the2012 International Residential Code (IRC )simplified wall bracing requirements. Theseminar will focus on basic requirementsand step through the process of applyingthe Simplified Wall Bracing procedure.2012 IRC Simplified Wall Bracing31
2012 IRC Simplified Wall Bracing Provisions4/28/2015 Sandra Hyde, P.E. ICC Senior Staff Engineer ICC ProductDevelopment2012 IRC Simplified Wall Bracing At any time during thepresentation, pleasetype your questions intothe Q & A portion ofAdobe Connect Box. The facilitator\speakerwill respond to yourquestions at the end ofthe webinar.Type yourquestionsinto here.2012 IRC Simplified Wall Bracing 4Then hit enteror the sendbutton.5Polling questions2012 IRC Simplified Wall Bracing62
2012 IRC Simplified Wall Bracing Provisions4/28/2015GoalParticipants will successfully apply theprovisions of Section R602.12 of the 2012 IRCto problems involving bracing requirementsfor wood-framed residential structures intheir region.2012 IRC Simplified Wall Bracing7ObjectivesUpon Completion of this webinar, you willbe able to:›››Identify methods of resistance of a dwellingto lateral forces such as high winds orearthquakes.Identify bracing requirements of SectionR602.12.Use the simplified wall bracing provisions ofSection R602.12.2012 IRC Simplified Wall Bracing8WindSeismicForce Pressure x AreaForce Mass x Acceleration2012 IRC Simplified Wall Bracing93
2012 IRC Simplified Wall Bracing Provisions4/28/2015WindSpeed2012 IRC Simplified Wall Bracing102012 IRC Simplified Wall Bracing11WindDesignRequiredSDC – United States(2012 IRC)2012 IRC Simplified Wall Bracing124
2012 IRC Simplified Wall Bracing Provisions4/28/2015Effects of ForcesRackingBase ShearOverturningResisted by BracingResisted by AnchorsResisted by hold-downs& Dead Load2012 IRC Simplified Wall Bracing13Effects of ForcesRackingResisted by Bracing2012 IRC Simplified Wall Bracing14Lateral ForcesRacking155
2012 IRC Simplified Wall Bracing Provisions4/28/2015Lateral Forces2003 Missouri Tornado16Wall FramingHingeHinge2012 IRC Simplified Wall Bracing17Wall FramingPanelresistanceimparted towall framing(Prevents hinging)2012 IRC Simplified Wall Bracing186
2012 IRC Simplified Wall Bracing Provisions4/28/2015Effects of ForcesBase ShearResisted by Anchors2012 IRC Simplified Wall Bracing19Base Shear20Anchors217
2012 IRC Simplified Wall Bracing Provisions4/28/2015Effects of ForcesOverturningResisted by hold-downs& Dead Load2012 IRC Simplified Wall Bracing22OverturningFebruary 2008Macon Co.‘Super Tuesday’Tornado2012 IRC Simplified Wall Bracing23hold-downs2012 IRC Simplified Wall Bracing248
2012 IRC Simplified Wall Bracing Provisions4/28/2015Upper StoryHold-downs2012 IRC Simplified Wall Bracing25The goal of simplified wall bracing is tocut the number of options down tospeed up the process of determiningbracing length.2012 IRC Simplified Wall Bracing26Prescriptive LimitsThe structure must meet the following requirements: Seismic Design Category (SDC) A, B, or C (SDC A or B for townhouses)Basic Wind Speed of 90 mph or less with Wind Exposure Category A or BOne or two story structureWood structural panel (WSP) or structural fiberboard sheathing (SFB) isused to brace exterior walls with ½ in gypsum board fastened to theinterior side of walls60 ft. maximum length and width of the buildingMax eave-to-ridge height of 15 ft.Wall max height of 10 ft.Max ratio between long and short side of building: 3 to 1Max cantilever of 24 inches beyond foundationNo cripple walls in two story buildings2012 IRC Simplified Wall Bracing279
2012 IRC Simplified Wall Bracing ProvisionsPrescriptive LimitsWind Exposure4/28/2015Wind Speed 90 mph or less28PrescriptiveLimitsBuildingLength1 or 2 storyWSPBracedWall PanelMaterialSFB2012 IRC Simplified Wall Bracing29PrescriptiveLimitsEave to Ridge Height 10 ft. 15 ft.Wall Height2012 IRC Simplified Wall Bracing3010
2012 IRC Simplified Wall Bracing Provisions4/28/2015Prescriptive LimitsMaximum Cantilever 24in.Max. Length to WidthRatio 3 to 12012 IRC Simplified Wall Bracing31Prescriptive LimitsSDC A or B1 or 2-family SDC CUpper StorySingle StoryCripple WallsCripple walls on single story onlyBottom StoryCripple Wall2012 IRC Simplified Wall Bracing32Advantages to the Simplified Method:› No seismic requirements› Bracing only occurs on the perimeter (exterior walls)(No braced wall line length or spacing)› No additional adjustment factors to check› No interpolation2012 IRC Simplified Wall Bracing333311
2012 IRC Simplified Wall Bracing Provisions4/28/2015Procedure:1. Draw a rectangle around the perimeter ofthe building and stagger the requirednumber of bracing units along the fourwall lines. Rectangle sides 60 feet long or less Ratio of side length a maximum of 3:1R602.12.12012 IRC Simplified Wall Bracing34Rectangle Circumscribing an EnclosedBuildingFigure R602.12.12012 IRC Simplified Wall Bracing35Procedure cont.:2. Identify the number of bracing unitsrequired on each side of the rectangleand their minimum length.R602.12.43612
2012 IRC Simplified Wall Bracing Provisions4/28/2015Simplified Wall BracingMinimum Number of Bracing Units on Each Side of theCircumscribed RectangleTable imum Number of BracingUnits on Each Long Side a,bLength of short side (ft.) cMinimum Number of BracingUnits on Each Short Side a,bLength of long side (ft.) c1020304050 60 10 20 30 40 50 a. Interpolation shall not be permitted.b. Cripple walls or wood-framed basement walls in a walk-out condition of aone-story structure shall be designed as the first floor of a two-story house.c. Actual lengths of the sides of the circumscribed rectangle shall berounded to the next highest unit of 10 when using this table.Simplified Wall BracingR602.12.2, R602.12.3Bracing Methods for Simplified Wall BracingMaterialStud Spacing& FastenerCriteriaWoodTable R602.3(3)Structural PanelStructuralFiberboardSheathingMax 16''spacingTable R602.3(1)FastenerSpacingCriteria6'' edge12'' field3" edge6'' fieldBracing UnitMethodMinimumBracing UnitLength ent4a. Mixing of wood structural panel and structural fiberboard sheathing in one buildingis not permitted.b. Continuous and intermittent bracing units may be mixed from one story to another.c. Continuous and intermittent bracing unit methods may not be mixed within onestory.Procedure cont.:3. Bracing RequirementsR602.12.5 Wall lines 8 feet or longer must have at least one bracing unitplaced along the wall line. Each wall line shall have a bracing unit within 12 feet of theend of the wall line (wall corner). Bracing units shall be within 20 feet of one another.3913
2012 IRC Simplified Wall Bracing ProvisionsProcedure cont.:4/28/2015R602.12.64. Narrow bracing unitsAdd narrow bracing units when full lengthunits do not fit if additional bracing isrequired.2012 IRC Simplified Wall Bracing40Narrow Bracing Methodsfor Simplified Wall -GCS-PF0.50.5PFH1PFG0.75R602.12.62012 IRC Simplified Wall Bracing41Narrow BracingMethods8’ to 10’Method CS-GH8’ to 10’H/62012 IRC Simplified Wall BracingMethod CS-PF4214
2012 IRC Simplified Wall Bracing Provisions4/28/2015Narrow BracingMethodsH8ꞌ to 10ꞌ16"Method PFHH8ꞌ to 10ꞌH/4Method PFG2012 IRC Simplified Wall Bracing43R602.12.6 Lateral Support and Stem Walls› Use Section R602.10.8.2 to add bracing to rafter ortruss areas to complete the load path from roofsheathing to the bracing unit.› Stem walls Less than 4 feet long and More than 1 foot tall need to meet the requirements of Section R602.10.9when the concrete wall is less than 6 inches thick or whena masonry wall is used.2012 IRC Simplified Wall Bracing44Simplified Wall BracingRafters connected to the top plates ofbraced wall panels with blocking: Figure R602.10.8.2(1) Table R602.3(1)15
2012 IRC Simplified Wall Bracing ProvisionsNarrow Wall Requirements4/28/2015Only required for wallsless than 48" long.46Example 1›››››››SDC AWind 90 mph, Wind Exposure BMethod WSP2 StoryWalls – Top Story - 9 ft.Walls – Bottom Story - 10 ft.Eave to ridge height - 10 ft.90mphTwoStorySDCANAExample Highlights:› Strategic placement of bracing units2012 IRC Simplified Wall Bracing47Upper Story36'-10"24'-11"Round to40 ft1.Drawrectanglearound theentire buildingCheck thelength of theN-S and E-Wsides the ofrectangleRound to30 ftLess than 60 ft.?OK2012 IRC Simplified Wall Bracing4816
2012 IRC Simplified Wall Bracing Provisions4/28/2015Simplified Wall BracingTable R602.12.4 Minimum Number of Bracing UnitsWalls – top story - 9 ftEave to ridge height - 10 ftUpper StoryWSP36'-10"WSPWSP1. 2 bracing unitsrequired along eachwall line2. With WSP, theminimum bracing unitlength is 4 ft.24'-11"3. Panels must be within12 ft. of the end ofwall line and within 20ft. of one another.Sufficient space?WSPWSPWSPYes, there are morethan two panels oneach wall within 12 feetof the end of the walland 20 feet of eachother50Upper Story36'-10"WSP1. 2 bracing unitsrequired along eachwall lineWSP24'-11"2. With WSP, theminimum bracingunit length is 4 ft.3. Panels must be within12 ft. of the end ofwall line and within20 ft. of one another.WSPSufficient space?WSPYes, there are twopanels on each wallwithin 12 feet of theend of the wall and 20feet of each other5117
2012 IRC Simplified Wall Bracing Provisions4/28/2015Upper StoryTotal WSPWSPWSP52Example 1 – Bottom Story› SDC A› Wind 90 mph, Wind Exposure B› Method WSP› Walls – Bottom Story - 10 ft.› Eave to ridge height - 10 ft.2012 IRC Simplified Wall Bracing36'-10"Assume40 ft24'-11"53Bottom Story1.Draw rectanglearound theentire buildingCheck thelength of the N-Sand E-W sidesthe of rectangleAssume30 ftLess than 60 ft.?OK5418
2012 IRC Simplified Wall Bracing Provisions4/28/2015Simplified Wall BracingTable R602.12.4 Minimum Number of Bracing UnitsWalls – bottom story - 10 ftEave to ridge height - 10 ft55Bottom StoryWSP36'-10"WSPWSP1. 3 bracing unitsrequired along eachwall line2. With WSP, theminimum bracingunit length is 4 ft.24'-11"3. Panels must be within12 ft. of the end ofwall line and within20 ft. of one another.Sufficient space?WSPWSPWSPYes, there are threepanels on each wallwithin 12 feet of theend of the wall and 20feet of each other.56Bottom Story36'-10"WSP3'3′-6ʺ1. 4 bracing unitsrequired along eachWSPwall line2. With WSP, theminimum bracing unitlength is 4 ft.WSP4′-6ʺ3. Panels must be within12 ft. of the end ofwall line and within 20ft. of one another.4′-6ʺWSP4′-6ʺWSP24'-11"Sufficient space?WSP5′-6ʺNo, there is only spacefor three panels oneach wall. All panelsare not a minimum of 4ft in length.5719
2012 IRC Simplified Wall Bracing ProvisionsBottom Story36'-10"CSWSPWSP3'4/28/2015CSWSP3′-6ʺ1. 4 bracing unitsrequired along eachwall line2. With CS-WSP, theminimum bracing unitlength is 3 ft.CSWSPWSP4′-6ʺ4′-6ʺ3. Panels must be within12 ft. of the end of wallline and within 20 ft. ofone another.CSWSPWSP24'-11"Sufficient space?5′-6ʺWSPCSWSP12.5 ft4′-6ʺ13 ftCSWSPYes, all panels are atleast 3 feet in length.Adding the panellengths togethergives more than 12feet of bracing.58Total required bracing – allmust be CS-WSP on thebottom storyCSWSPBottom CSWSPCSWSPWSPCS-WSPCS-WSPCS-WSP59Example 2››››››SDC BWind 90 mph, Wind Exposure BMethod CS-WSP1 StoryWalls - 9 ft.Eave to ridge height - 12 ft.OneStory90mphSDCBNAExample Highlights:› Strategic placement of bracing units2012 IRC Simplified Wall Bracing6020
2012 IRC Simplified Wall Bracing Provisions4/28/201559'-8"1. Drawrectanglearound theentirebuilding2. Check thelength ofthe N-S andE-W sidesthe ofrectangle49'-4"Less than 60ft.?OK61Bracing: Simplified Wall BracingTable R602.12.4 Minimum Number of Bracing UnitsWalls - 9 ftEave to ridge height - 12 ft621. 4 bracing unitsrequired alongeach wall line59'-8"CSWSPCSWSPCSWSP49'-4"CSWSP2. With CS-WSP, theminimumbracing unitlength is 3 ft.3. Panels must bewithin 12 ft. ofthe end of wallline and within 20ft. of oneanother.CSWSPSufficient space?Yes, CS-PF units areonly worth 0.5 unitseach so 5 B.U.s minwill be needed onthe south P12'CSWSPFurthermore, 3 CSPF are needed tospace units lessthan 20 ft. apart.21
2012 IRC Simplified Wall Bracing Provisions4/28/201559'-8"CSWSPCSWSP16'-8"CSWSP 4 bracing units requiredalong each wall line Panels must be within 12ft. of the end of wall lineand within 20 ft. of P14'-1"Sufficient space?22'-2"Yes, 4 CS‐WSPbracing units fitalong the east andwest wall lines.CSWSPCSWSP5'-6"6459'-8"CSWSPCSWSPCSWSPWhat about theexterior wall linesin the -8"49'-4"CSWSPCSWSPEach exterior wallneeds at least onebracing unit.6622
2012 IRC Simplified Wall Bracing CS‐PFCSWSPCSWSP67 Please type yourquestions into the Q& A portion of theAdobe Connect Box.The facilitator and/orthe speaker will nowrespond to yourquestions.68Sandra Hydeshyde@iccsafe.org888-422-7233x77556923
2012 IRC Simplified Wall Bracing Provisions4/28/2015Next ICC WebinarsMAY is Building Safety Month Complimentary WebinarsSignificant Changes in the ICC 500 – 2014 and FEMA P-361May 12, 2015 1PM CSTNonpotable Water System Provisions in the 2015 IPCMay 19, 2015 1PM CSTOverview of the 2015 IECC Section R406 and RESNET/HERSMay 28, 2015 1PM CSTCheck our LIVE SCHEDULE for more informationwww.iccsafe.org/education71Certificates of Completion will be sent out within48-72 hours after the webinar has beencompleted.7172To schedule a seminar, contact:Training and Educationat1-888-ICC-SAFE (422-7233) Ext. 33818orE-mail: icctraining@iccsafe.org7224
2012 IRC Simplified Wall Bracing Provisions4/28/2015Copyright Materials73This presentation is protected by US andInternational Copyright laws.Reproduction, distribution, display and use ofthe presentation without written permission ofthe speaker is prohibited. International Code Council 20157325
2012 IRC Simplified Wall Bracing Provisions 4/28/2015 3 7 Goal Participants will successfully apply the provisions of Section R602.12 of the 2012 IRC to problems involving bracing requirements for wood-framed residential structures in their region. 2012 IRC Simplified Wall Bracing 8 Objectives Upon Completion of this webinar, you will be able to:
115 mph, no special wind region 2018 IRC Simplified Wall Bracing Provisions Lateral Forces –Wind Speed Figure R301.2(4)B design required areas 2018 IRC Simplified Wall Bracing Provisions 11 Wind Design Required –USA Figure R301.2(5)B hazards.atcouncil.org 2018 IRC Simplified Wall Bracing Provisions 12 High Wind Regions!
The guide is divided into six sections intended to supplement and enhance the 2009 IRC wall bracing provisions: Section 1: Basic Concepts for Code-Compliant Wall Bracing Section 2: Wall Bracing Methods Section 3: Applying the Code Section 4: „Beyond Code‟ Bracing Solutions Section 5: Wall Bracing Options for Foam-Sheathed Wall Systems .
Historically, proper wall bracing construction per the IRC required a minimum of 4-feet of available wall length. With design trends calling for larger window openings and narrow garage return walls, the wall space available for bracing has been limited. This bulletin outlines braced wall panel options for narrow wall segments (IRC R602.10).
Bracing for steps in floors and ceilings 21 8. Wall bracing 26 9. Walls at angles to bracing lines 27 10. Roof bracing 30 11. Bracing ratings . magazine looks at the bracing requirements for . floors or ceilings
32 — Build 133 — December 2012/ January 2013 Wall bracing THIS THIRD ARTICLE IN A BUILD SERIES ON CALCULATING BRACING REQUIREMENTS FOR A BUILDING LOOKS AT WALL BRACING. TOM EDHOUSE, BRANZ TECHNICAL ADVISOR DESIGN RIGHT The same building is being used as in the previous article on subfloor bracing (see Build 132, pages 38–41) with additional information in
UDC Wall Bracing Provisions Permanent Rule effective September 1, 2014 A ‘How To’ guide for use of the new provisions Summary: Forget what you knew about the previous wall bracing provisions – this method is a different concept. The provisions are generally based on the 2012 IRC Simplified Wall Bracing Provisions.
2015 IRC Transition from the 2009 IRC 34 2012 R308.4.2 Glazing Adjacent to Doors Glazing installed perpendicular to a door in a closed position and within 24in of the door only requires safety glazing if it is on the hinge side of an in-swinging door. 2015 IRC Transition from the 2009 IRC 35 2015 Glazing and Wet Surfaces 2012 IRC 2015 IRC
Foundations of Description Logics 77 1 Introduction Come join the DL vaudeville show! It’s variable-free, although With quantifiers, not, and, or Quite deeply rooted in FOLklore. Still, curing the first-order ailment We sport decidable entailment! Fig.1. The DL logo While formal, logic-based approaches to rep-resenting and working with knowledge occur throughout human history, the advent .
