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IRC 2012 Wall Bracing: Codes and Construction Methods

Join us to learn about the IRC 2012 codes and construction methods for wall bracing. Discover the requirements for braced wall lines and panels, along with simplified wall bracing techniques. Don't miss the Q&A session with an industry expert.

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IRC 2012 Wall Bracing: Codes and Construction Methods

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  1. IRC 2012: Wall Bracing May 31, 2016

  2. Introduction Presenter Wade Greene CBO, MCP Georgia Regional Chief Building Official | SAFEbuilt Host Aaron Ross Owens Director of External Affairs | SAFEbuilt

  3. Here’s what you’ll learn by hanging around • Review of IRC 2012 602.10 (and a little of IRC 2012 602.12). • Braced wall lines. • Braced Wall Panel Location • Braced Wall Panel Construction • Simplified Wall Bracing

  4. Make sure you stay right to the end • Q&A with Wade • Type your questions in the chat box on the GoToWebinar control box.

  5. OVERVIEW

  6. BRACED WALL LINES

  7. 602.10.1 BRACED WALL LINES • Braced wall lines shall be designated as straight lines in the building plans • Length shall be the distance between its ends • Intersection with a perpendicular braced wall line • Angled braced wall panel as permitted in 602.10.1.1 & 602.10.1.4 • Exterior wall as shown in figure 602.10.1.1 • All exterior walls parallel to a braced wall line shall be offset not more than 4 feet

  8. 602.10.1 BRACED WALL PLANS

  9. 602.10.1.3 BWL SPACING 602.10.1.3 BWL SPACING SPACING BETWEEN PARALLEL BWL IN ACCORDANCE WITH TBL 602.10.1.3

  10. 602.10.1.4 ANGLED BRACED WALL

  11. 602.10.2 BRACED WALL PANELS

  12. 602.10.2 BRACED WALL PANELS • Shall be full-height sections of wall with no vertical or horizontal offsets • Braced Wall Panel Uplift (R602.10.2.1) • Bracing lengths apply when uplift loads are resisted per R602.3.5 • Location of BWP (R602.10.1.2) • Within 10 feet of each end • Adjacent edges of braced wall panels along BWL no greater than 20 feet

  13. 602.10.2.1 BWP UPLIFT LOAD PATH • R602.3.5 Exterior walls supporting Rafters or Trusses shall be connected: • 1. Fastening in accordance with Table R602.3(1) where: • Wind speed less than 90 Mph • Exposure B, Roof 5:12 or greater & Roof span 32 ‘ or less • The net uplift value at the top of a wall does not exceed 100 plf • 2. Where the net uplift value at the top of a wall exceeds 100 plf (146 N/mm), installing approved uplift framing connectors 3. Designed in accordance with accepted engineering practice

  14. Braced Wall Panel LocationsFIGURE 602.10.2.2

  15. 602.10.2.3 MINIMUM # BWP • Braced Wall Lines 16’ or less • 2 Braced Wall Panels of any length or • 1 Braced Wall Panel 48” or greater • Braced Wall Lines 16’ or greater • 2 Braced Wall Panels Minimum

  16. R602.10.3 REQUIRED LENGTH OF BRACING Bldgs in Seismic Design Categories A & B use Tbl 602.10.3(1) with adjustments of Tbl 602.10.3(2) Detached bldg in SDC C shall use Tables associated with Principal Building Design Townhouses in SDC C shall use the greater value determined from Tbl 602.10.3(1) or (3) with adjustments from Tbl 602.10.(2) All buildings in SDC D shall use greater value from Tbl 602.10.3 (1)or (3) with adjustment factors from Tbl 602.10.3(2) or (4)

  17. TABLE 602.10.3 (1)

  18. TABLE 602.10.3 (2)

  19. TABLE 602.10.3 (3)

  20. TABLE 602.10.3 (4)

  21. BRACED WALL PANEL CONSTRUCTION

  22. 602.10.4 CONSTRUCTION METHODS FOR BWP • Intermittent and Continuously sheathed BWP per Tbl 602.10.4 • Mixing bracing Methods as follow • Intermittent & continuous from story to story permitted • Mixing intermittent from BWL to BWL permitted in SDC A,B and C if Wind design is 100 or less • Mixing intermittent bracing along a BWL in SDC A & B and detached dwellings in SDC C if in accordance with Tbl 602.10.3(1) or (3) • Mixing continuous bracing CS-WSP. CS-G & CS-PF along braced wall permitted • Mixing intermittent for detached dwellings in SDC C In some instances

  23. BRACING METHODS TBL 602.10.4

  24. TABLE 602.10.5 MINIMUM BWP

  25. BWP ADJACENT TO OPENINGS

  26. R602.10.5 MINIMUM LENGTH OF A BRACE WALL PANEL Methods CS-WSP & CS-SFB to comply with Tbl 602.10.5 Minimum Panel Length based on adjacent clear opening height per Tbl & Figure 602.10.5

  27. Alternate Braced Wall (ABW)R602.10.6.1

  28. Portal Frame w/Hold Down (PFH)R602.10.6.2

  29. BRACED WALL PANEL SUPPORTR602.10.9

  30. SIMPLIFIED WALL BRACING

  31. SIMPLIFIED WALL BRACINGR602.10.12 • Buildings meeting all conditions may use Simplified Method: • Two stories max placed on Concrete/Masonry Foundation or Basement • Floor cantilever 24” Maximum • Wall Height 10” Maximum • Roof eave to Ridge height 15” maximum • Exterior walls receive ½ “ sheetrock minimum on interior side • Located in 90/40 wind loading and Exposure A or B • Seismic Design Category A,B or C for detached A or B for Townhouses • Cripple walls not permitted in two-story buildings

  32. CIRCUMSCRIBED RECTANGLER602.12.1 • Bracing Requirements: • Determined by circumscribing rectangle around entire bldg. including all offsets and projections • No side of bldg. greater than 60” • Long wall to short wall ratio maximum of 3:1

  33. SHEATHING MATERIALSR602.10.12.2 • The Following Sheathing Materials shall be installed on exterior side of exterior walls: • 1. Wood structural panels 3/8” minimum thickness fastened per Tbl 602.3(3) • 2. Structural fiberboard sheathing minimum ½” thick fastened per Tble 602.3(1)

  34. SHEATHING MATERIALSR602.10.12.2

  35. BRACING UNITR602.10.12.3 • BRACING UNITS • Full Height segment of exterior wall • No Openings or offsets • Length as specified here • Interior walls shall not contribute toward required bracing amount • 1. Where entire exterior wall sheathed with WSP bracing unit 3” minimum • 2. Where exterior wall sheathed with fiberboard sheathing bracing unit 4’ minimum

  36. BRACING UNIT LOCATION & DISTRIBUTIONR602.12.4 & 5 • Each side of rectangle have minimum number of Bracing units per • Table 602.12.4 • Bracing Units to be Distributed per Figure 602.12.5 • No more than 12 feet from any wall corner • Distance between adjacent edges 20” maximum • Segments of wall greater than 8’ have minimum of one Bracing Unit

  37. BRACING UNIT LOCATION & DISTRIBUTIONR602.12.4 & 5

  38. NARROW PANELSR602.12.6 • Bracing Methods referred to in 602.10 and specified here are permitted: • Method CS-G – permitted for one story garages if all walls sheathed. Each CS-G panel shall equal 0.5 Bracing Unit • Method CS-PF – permitted when all walls sheathed with WSP. Each panel to equal 0.5 Bracing Unit. Maximum of 4 panels on all segment of walls parallel to all sides of circumscribed rectangle • Methods PFH & PFG – permitted when using WSP. Each PFH Panel shall equal one Bracing unit. Each PFG shall equal 0.75 Bracing Unit

  39. LATERAL SUPPORTR602.12.7 • Bracing Units at eaves: Vertical distance from top wall plate to roof sheathing above shall not exceed 9.25” • Exception: Vertical distance allowed < 9.25 if lateral support is installed per R602.10.8.2

  40. STEM WALLSR602.12.8 • Masonry Stem Walls with height and length 48” or less: • Supporting a Bracing Unit or: • Method CS-G. CS-PF, PFG braced wall panel • Shall be constructed per Figure R602.10.9 • Concrete Stem Walls: • 48” or less in length, Greater than 12” tall and Less than 6” thick • Shall be reinforced sized and located per R602.10.9

  41. BRACED WALL PANEL SUPPORTR602.10.9

  42. SO… WHAT NOW?

  43. So the obvious question is… How can we help you? Two equally-valid options: • This webinar, alone. • Additional training, plan review / inspection assistance, etc. If you’ve got it from here, great! If we can help in any way, great!

  44. Q&A Type questions in chat box 

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