T aming the Wind with Engineered Tall Walls TALL WALL SYSTEMS  TOOLS FOR TALL WALL DESIGN Continuing Education program Don...
Learning Objectives <ul><li>At the conclusion of this course we want you: </li></ul><ul><li>To gain an understanding of co...
Components of Tall Wall Systems <ul><li>Studs, Columns, Headers, Hardware </li></ul><ul><ul><li>Addition of lateral loadin...
<ul><li>Studs and Columns </li></ul><ul><ul><li>Assumed 1/6 eccentricity to account for level of accuracy in field cutting...
<ul><li>Studs </li></ul><ul><ul><li>Wind loads based on spacing of studs </li></ul></ul><ul><ul><li>Uniform loads from abo...
<ul><li>Headers </li></ul><ul><ul><li>Wind load on windows creates loading on headers </li></ul></ul><ul><ul><li>Uniform o...
<ul><li>Hardware </li></ul><ul><ul><li>Requirements are minimal but must be accounted for. </li></ul></ul><ul><ul><li>Sele...
Components of Tall Wall Systems: Sheathing Requirements <ul><ul><ul><li>Not within the scope of Tall Wall Manufacturer </l...
Sheathing Requirements <ul><ul><ul><li>Reference APA documents as a primer </li></ul></ul></ul><ul><ul><ul><ul><li>www.apa...
Sheathing Requirements <ul><ul><ul><li>Reference APA documents as a primer </li></ul></ul></ul><ul><ul><ul><ul><li>www.apa...
<ul><li>Comparing fully engineered EWP, mixed dimensional, and full dimensional </li></ul><ul><ul><li>Disadvantages of mov...
Code Requirements  for Wall Systems <ul><li>A Member of the International Code Family </li></ul><ul><li>I NTERNATIONAL </l...
IRC Code Requirements  for Wall Systems Limits on size and spacing: Table R602.3(5) limits stud height to 10’, size to 2 x...
IRC Code Requirements  for Wall Systems Table R602.3.1 footnotes: -snow load not exceeding 25 psf -Fb>1310 psf (Equivalent...
<ul><li>Design Limitations, Load Bearing Walls </li></ul><ul><ul><li>34’ Roof Span- Table R602.3.1 </li></ul></ul><ul><ul>...
<ul><li>Prescriptive Code Limitations, Wall Design </li></ul><ul><ul><li>Structural Design Requirement: “Unless designed t...
Technical Tools <ul><li>Technical Tools for Tall Wall Design </li></ul><ul><ul><li>Literature </li></ul></ul><ul><ul><li>T...
Technical Tools <ul><li>Literature </li></ul><ul><ul><li>Design/construction guides </li></ul></ul><ul><ul><li>Specificati...
Technical Tools <ul><li>Literature </li></ul><ul><li>Assumptions used in the typical wall stud specification sheets: </li>...
Technical Tools <ul><li>Woodworks Sizer Software </li></ul><ul><ul><li>Design single members (beams, columns, wall studs) ...
Design Example- IRC <ul><li>Given: </li></ul><ul><ul><li>Stud length = 20 feet </li></ul></ul><ul><ul><li>Uniform vertical...
Design Example
Design Example <ul><li>Stud Design </li></ul><ul><li>1) Defining the parameters </li></ul><ul><ul><li>Wall height </li></u...
 
Design Example <ul><li>Stud Design </li></ul><ul><li>2) Loading the column (stud) </li></ul><ul><ul><li>Axial uniformly di...
 
Design Example <ul><li>Stud Design </li></ul><ul><li>3) Running the analysis </li></ul><ul><ul><li>Failed results shown in...
 
Design Example <ul><li>Stud Design </li></ul><ul><ul><li>All loads must be tracked to the foundation by the designer of re...
Tall Wall Out of Plane Connections 565 LBS (DF/SYP) A23 & A21 Courtesy Simpson StrongTie C-2006, PG 170
Tall Wall Out of Plane Connections 940 LBS (DF/SYP) Courtesy Simpson StrongTie C2006, PG 165
Sustainability/Green Building <ul><li>Requires a regenerating forest </li></ul><ul><li>Guidelines:  </li></ul><ul><ul><li>...
Framing Applications meeting Green Building Guidelines- Resource Efficiency <ul><li>Resource Efficiency </li></ul><ul><ul>...
Framing Applications meeting Green Building Guidelines-Resource Efficiency <ul><li>Resource Efficiency Applications- EWP <...
Framing Applications meeting Green Building Guidelines- Energy Efficiency <ul><li>Energy Efficiency Requirements: Increase...
Advanced Framing Techniques
Course Summary <ul><li>By now you should be familiar with the  </li></ul><ul><li>following: </li></ul><ul><li>Common termi...
Questions? This concludes the continuing education course. The next 10 minutes will be focused on discussing the course ma...
T aming the Wind with Engineered Tall Walls TALL WALL SYSTEMS  TOOLS FOR TALL WALL DESIGN Continuing Education program Tha...
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Taming The Wind with Engineered Tall Walls

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This presentation discusses the requirements for tall wall framing systems for wood frame structures and provides a sizing example.

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  • Speaker: Please briefly Introduce yourself and your company, and give just a quick background of you experience. Define the scope of the presentation and its importance: Life safety issues with structural failures due to inadequate design Adequate design, not overdesign Available tools for designers
  • Taming The Wind with Engineered Tall Walls

    1. 1. T aming the Wind with Engineered Tall Walls TALL WALL SYSTEMS TOOLS FOR TALL WALL DESIGN Continuing Education program Don Simon Phone: 847.304.5801 [email_address]
    2. 2. Learning Objectives <ul><li>At the conclusion of this course we want you: </li></ul><ul><li>To gain an understanding of common terminology related to tall wall components and tall wall design. </li></ul><ul><li>To gain an understanding of the International Residential, MN and WI Code requirements relating to tall wall design. </li></ul><ul><li>To gain an understanding of the unique loading requirements on tall walls and how a tall wall system accounts for these loads in a residential/light commercial structure. </li></ul><ul><li>To be able to evaluate the features and benefits of 3 tall wall systems: fully engineered proprietary, mixed engineered/dimensional, and fully dimensional. </li></ul><ul><li>To gain an understanding of appropriate use of design tables and engineering software in the design process. </li></ul><ul><li>To walk through an introductory tall wall design problem using engineering software. </li></ul>
    3. 3. Components of Tall Wall Systems <ul><li>Studs, Columns, Headers, Hardware </li></ul><ul><ul><li>Addition of lateral loading </li></ul></ul><ul><ul><ul><li>Beam, Column and Stud Load tables revised to include lateral loading </li></ul></ul></ul><ul><ul><li>Addition of Hardware to resist lateral loading </li></ul></ul>
    4. 4. <ul><li>Studs and Columns </li></ul><ul><ul><li>Assumed 1/6 eccentricity to account for level of accuracy in field cutting </li></ul></ul>Components of Tall Wall Systems
    5. 5. <ul><li>Studs </li></ul><ul><ul><li>Wind loads based on spacing of studs </li></ul></ul><ul><ul><li>Uniform loads from above create axial loads </li></ul></ul><ul><li>Columns </li></ul><ul><ul><li>Wind load on windows and studs creates loading on columns </li></ul></ul><ul><ul><li>Point loads from above create axial loads </li></ul></ul>Components of Tall Wall Systems
    6. 6. <ul><li>Headers </li></ul><ul><ul><li>Wind load on windows creates loading on headers </li></ul></ul><ul><ul><li>Uniform or Point loads from above create gravity/vertical loads on headers </li></ul></ul>Components of Tall Wall Systems
    7. 7. <ul><li>Hardware </li></ul><ul><ul><li>Requirements are minimal but must be accounted for. </li></ul></ul><ul><ul><li>Selection based on wind reaction at ends of members </li></ul></ul><ul><ul><li>Nails can be sufficient, but how to satisfy the inspector? </li></ul></ul>Components of Tall Wall Systems
    8. 8. Components of Tall Wall Systems: Sheathing Requirements <ul><ul><ul><li>Not within the scope of Tall Wall Manufacturer </li></ul></ul></ul><ul><ul><ul><li>Contingent on site and building conditions </li></ul></ul></ul><ul><ul><ul><li>Responsibility of Designer or Engineer of record </li></ul></ul></ul><ul><ul><ul><li>Reference APA documents as a primer </li></ul></ul></ul><ul><ul><ul><li>Refer to local code requirements for specifics </li></ul></ul></ul>
    9. 9. Sheathing Requirements <ul><ul><ul><li>Reference APA documents as a primer </li></ul></ul></ul><ul><ul><ul><ul><li>www.apawood.org/publications </li></ul></ul></ul></ul><ul><ul><ul><ul><li>APA Help Desk: (253)620-7400 [email_address] </li></ul></ul></ul></ul>Form F 430 Form G440
    10. 10. Sheathing Requirements <ul><ul><ul><li>Reference APA documents as a primer </li></ul></ul></ul><ul><ul><ul><ul><li>www.apawood.org/publications </li></ul></ul></ul></ul><ul><ul><ul><ul><li>APA Help Desk: (253)620-7400 [email_address] </li></ul></ul></ul></ul>Form W 650 Form X 305
    11. 11. <ul><li>Comparing fully engineered EWP, mixed dimensional, and full dimensional </li></ul><ul><ul><li>Disadvantages of moving away from pre-engineered system. </li></ul></ul><ul><ul><li>Engineering fees </li></ul></ul><ul><ul><li>Time element for design completion based on engineer’s schedule. </li></ul></ul><ul><ul><li>Quality of materials </li></ul></ul>Types of Tall Wall Systems
    12. 12. Code Requirements for Wall Systems <ul><li>A Member of the International Code Family </li></ul><ul><li>I NTERNATIONAL </li></ul><ul><li>R ESIDENTIAL </li></ul><ul><li>C ODE ® </li></ul><ul><li>FOR O NE- AND T WO- F AMILY D WELLINGS </li></ul><ul><li>2006 </li></ul>
    13. 13. IRC Code Requirements for Wall Systems Limits on size and spacing: Table R602.3(5) limits stud height to 10’, size to 2 x 6 and spacing to 16” for homes with 2 floors, roof and ceiling.
    14. 14. IRC Code Requirements for Wall Systems Table R602.3.1 footnotes: -snow load not exceeding 25 psf -Fb>1310 psf (Equivalent to #2 SYP) - E value >1.6x10 6 psi (Equiv to #2 SYP) -Tributary dimension for floors/roofs < 6’ -Max. floor/roof span < 12’ “ Where the conditions are not within these parameters, desing is required.”
    15. 15. <ul><li>Design Limitations, Load Bearing Walls </li></ul><ul><ul><li>34’ Roof Span- Table R602.3.1 </li></ul></ul><ul><ul><li>Suitable for roof support only. </li></ul></ul><ul><ul><li>Walls supporting roof and floor require design </li></ul></ul><ul><li>Footnotes/Amendments to Table R602.3.1 </li></ul><ul><ul><li>Ground Snow Load=60 psf, roof snow = 42 psf </li></ul></ul><ul><ul><li>SPF#2 or better </li></ul></ul><ul><ul><li>Exposure B or C only </li></ul></ul><ul><ul><li>Based on a maximum L/120 deflection (windows?) </li></ul></ul><ul><ul><li>“ Where the conditions are not within these parameters, design is required.” </li></ul></ul>2007 Minnesota Building Code Requirements
    16. 16. <ul><li>Prescriptive Code Limitations, Wall Design </li></ul><ul><ul><li>Structural Design Requirement: “Unless designed through structural analysis, wood frame walls shall comply with the following requirements.” </li></ul></ul><ul><ul><li>32’ Building Width, based on header limitations </li></ul></ul><ul><ul><li>of Table 21.25 B-D </li></ul></ul><ul><ul><li>Stud Height/Spacing: 2 floors, roof and ceiling </li></ul></ul><ul><ul><ul><li>2 x 6 @ 16 oc- 10’ limit. </li></ul></ul></ul><ul><ul><li>Walls designed to withstand a horizontal wind pressure of at least 20 psf. </li></ul></ul><ul><ul><li>No reductions permitted for shielding effects of other buildings (exposure adjustments) </li></ul></ul>Wisconsin Uniform Dwelling Code Comm 21.23 Requirements
    17. 17. Technical Tools <ul><li>Technical Tools for Tall Wall Design </li></ul><ul><ul><li>Literature </li></ul></ul><ul><ul><li>Technical Support </li></ul></ul><ul><ul><li>Woodworks Sizer Software </li></ul></ul><ul><li>Design Example using Sizing Software </li></ul><ul><ul><li>Stud Design </li></ul></ul><ul><ul><li>1) Defining the parameters </li></ul></ul><ul><ul><li>2) Loading the column (stud) </li></ul></ul><ul><ul><li>3) Running the analysis </li></ul></ul><ul><li>Software Example </li></ul>
    18. 18. Technical Tools <ul><li>Literature </li></ul><ul><ul><li>Design/construction guides </li></ul></ul><ul><ul><li>Specification sheets </li></ul></ul><ul><ul><li>Installation guides </li></ul></ul><ul><ul><li>Design examples </li></ul></ul><ul><ul><li>Construction details </li></ul></ul>
    19. 19. Technical Tools <ul><li>Literature </li></ul><ul><li>Assumptions used in the typical wall stud specification sheets: </li></ul><ul><ul><li>Studs laterally braced; </li></ul></ul><ul><ul><li>Uniformly distributed loads; </li></ul></ul><ul><ul><li>Load combinations in accordance with IBC; </li></ul></ul><ul><ul><li>Eccentric axial loading (1/6 th of stud depth); </li></ul></ul><ul><ul><li>Untreated products in dry service conditions. </li></ul></ul>
    20. 20. Technical Tools <ul><li>Woodworks Sizer Software </li></ul><ul><ul><li>Design single members (beams, columns, wall studs) </li></ul></ul><ul><ul><li>Columns may be designed for combined bending and axial loads (such as lateral and vertical loads) </li></ul></ul><ul><ul><li>Nailed and bolted built-up columns </li></ul></ul><ul><ul><li>Specify deflection limits, lateral </li></ul></ul><ul><ul><li>bracing, and eccentricity </li></ul></ul><ul><ul><li>Analyze beams loaded in both axis </li></ul></ul><ul><ul><li>Allowable stress design, provisions </li></ul></ul><ul><ul><li>based on NDS and IBC </li></ul></ul><ul><ul><li>Available on request </li></ul></ul>
    21. 21. Design Example- IRC <ul><li>Given: </li></ul><ul><ul><li>Stud length = 20 feet </li></ul></ul><ul><ul><li>Uniform vertical load = 900 plf (270/630) based on 32’ truss, 35 psf snow load, 15 psf dead load. </li></ul></ul><ul><ul><li>Basic wind speed = 90 mph </li></ul></ul><ul><ul><li>Mean roof height = 30 feet </li></ul></ul><ul><ul><li>Exposure category « B » </li></ul></ul><ul><ul><li>Lateral design wind load = 13.6 psf </li></ul></ul><ul><ul><ul><li>Ref. Wall Studs document </li></ul></ul></ul><ul><ul><li>Stud tributary width (spacing) = 16 inches </li></ul></ul><ul><ul><li>Deflection criteria = L/180 </li></ul></ul><ul><ul><ul><li>Windows and flexible exterior finish </li></ul></ul></ul>
    22. 22. Design Example
    23. 23. Design Example <ul><li>Stud Design </li></ul><ul><li>1) Defining the parameters </li></ul><ul><ul><li>Wall height </li></ul></ul><ul><ul><li>Stud spacing </li></ul></ul><ul><ul><li>Product selection </li></ul></ul><ul><ul><li>Deflection limits </li></ul></ul><ul><ul><ul><li>Deflection limits depend on the makeup of the wall: L/360 for brittle finishes like stucco, </li></ul></ul></ul><ul><ul><ul><li>L/180 minimum for window walls. </li></ul></ul></ul><ul><ul><li>Lateral support supplied by sheathing </li></ul></ul>
    24. 25. Design Example <ul><li>Stud Design </li></ul><ul><li>2) Loading the column (stud) </li></ul><ul><ul><li>Axial uniformly distributed loads (UDL) </li></ul></ul><ul><ul><ul><li>270 plf dead load and 630 plf snow load </li></ul></ul></ul><ul><ul><ul><li>Software adjusts axial loading based on spacing of studs </li></ul></ul></ul><ul><ul><ul><li>Eccentricity of 1/6 th x stud depth </li></ul></ul></ul><ul><ul><li>Full uniform area lateral load </li></ul></ul><ul><ul><ul><li>13.6 psf wind load </li></ul></ul></ul><ul><ul><ul><li>Select « Load Face Width » </li></ul></ul></ul><ul><ul><li>Select « Width » if lateral loads such as wind are </li></ul></ul><ul><ul><li>applied to the narrow face of the member . </li></ul></ul>
    25. 27. Design Example <ul><li>Stud Design </li></ul><ul><li>3) Running the analysis </li></ul><ul><ul><li>Failed results shown in red </li></ul></ul><ul><ul><li>Points of interest </li></ul></ul><ul><ul><li>Diagrams (M, V, D) </li></ul></ul><ul><ul><li>Design stresses </li></ul></ul><ul><ul><li>Governing load combination </li></ul></ul>
    26. 29. Design Example <ul><li>Stud Design </li></ul><ul><ul><li>All loads must be tracked to the foundation by the designer of record. </li></ul></ul><ul><ul><li>A complete wall specification should include permanent and safety bracing, blocking, connections details, etc. </li></ul></ul><ul><ul><li>Refer to manufacturer’s installation guide. </li></ul></ul>
    27. 30. Tall Wall Out of Plane Connections 565 LBS (DF/SYP) A23 & A21 Courtesy Simpson StrongTie C-2006, PG 170
    28. 31. Tall Wall Out of Plane Connections 940 LBS (DF/SYP) Courtesy Simpson StrongTie C2006, PG 165
    29. 32. Sustainability/Green Building <ul><li>Requires a regenerating forest </li></ul><ul><li>Guidelines: </li></ul><ul><ul><li>NAHB: ISO 14001, </li></ul></ul><ul><ul><li>USGBC/L.E.E.D. : FSC </li></ul></ul><ul><ul><li>What’s involved in sustainability </li></ul></ul><ul><ul><ul><li>Harvesting </li></ul></ul></ul><ul><ul><ul><li>Erosion Control </li></ul></ul></ul><ul><ul><ul><li>Replanting </li></ul></ul></ul><ul><ul><li>What involved in maximizing fiber </li></ul></ul><ul><ul><ul><ul><li>Best and highest use </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Tree tips </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Conversion to Market-ready products </li></ul></ul></ul></ul>
    30. 33. Framing Applications meeting Green Building Guidelines- Resource Efficiency <ul><li>Resource Efficiency </li></ul><ul><ul><li>Use OVE/Advanced Framing </li></ul></ul><ul><ul><li>4’ and 2 Modules </li></ul></ul><ul><ul><li>Wider o/c Spacing </li></ul></ul><ul><ul><li>More Insulation </li></ul></ul><ul><li>Eliminate thermal bridging </li></ul><ul><li>Single top plates </li></ul><ul><li>2 stud corners with drywall clips </li></ul><ul><li>P.E.T. </li></ul><ul><li>Construction layouts </li></ul>
    31. 34. Framing Applications meeting Green Building Guidelines-Resource Efficiency <ul><li>Resource Efficiency Applications- EWP </li></ul><ul><ul><li>24” oc wall and floor performance </li></ul></ul><ul><ul><li>Framing layouts </li></ul></ul><ul><ul><li>Panelize </li></ul></ul><ul><ul><li>P.E.T. </li></ul></ul>
    32. 35. Framing Applications meeting Green Building Guidelines- Energy Efficiency <ul><li>Energy Efficiency Requirements: Increase R Value in the building envelope </li></ul><ul><li>Applications: </li></ul><ul><ul><li>Remove wood, decrease thermal bridging, increase insulation…..how? </li></ul></ul><ul><ul><li>Use wide flange, heavy duty I joists at 24 oc., 1 ¾” wide face studs for walls. </li></ul></ul><ul><ul><li>Stack roof framing over wall framing over floor framing in a 24” oc module. </li></ul></ul><ul><ul><li>Use energy efficient materials when possible. </li></ul></ul>
    33. 36. Advanced Framing Techniques
    34. 37. Course Summary <ul><li>By now you should be familiar with the </li></ul><ul><li>following: </li></ul><ul><li>Common terminology related to tall wall components and tall wall design. </li></ul><ul><li>International Residential, MN and WI Code requirements relating to tall wall design. </li></ul><ul><li>Unique loading requirements on tall walls and how a tall wall system accounts for these loads in a residential/light commercial structure. </li></ul><ul><li>Evaluate the features and benefits of 3 tall wall systems: fully engineered proprietary, mixed engineered/dimensional, and fully dimensional. </li></ul><ul><li>Appropriate use of design tables and engineering software in the design process. </li></ul><ul><li>Tall wall design problem using engineering software. </li></ul>
    35. 38. Questions? This concludes the continuing education course. The next 10 minutes will be focused on discussing the course material.
    36. 39. T aming the Wind with Engineered Tall Walls TALL WALL SYSTEMS TOOLS FOR TALL WALL DESIGN Continuing Education program Thank You For Your Time! This Course has concluded. Don Simon Phone: 847-304-5801 [email_address]

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