Session 21 ic2011 miller

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Session 21 ic2011 miller

  1. 1. WOOD I-BEAMS AND “ZIG-ZAG”DECKING FROM ROUNDWOODINNOVATIVE AND EFFICIENT STRUCTURAL SECTIONS FROM ROUNDWOOD SUSTAINABLE DESIGN Brad Miller P.E. HDR Engineering, Inc. Tom Gorman P.E., Ph.D. University of Idaho FPS 65th International Convention Portland, Oregon June 19-21,2011
  2. 2. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides
  3. 3. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)
  4. 4. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)  Increases Ix-x (Strength) By 4.5 To 5 Times
  5. 5. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)  Increases Ix-x (Strength) By 4.5 To 5 Times  Sizes Possible From 6 to 48-Inches
  6. 6. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)  Increases Ix-x (Strength) By 4.5 To 5 Times  Sizes Possible From 6 to 48-Inches  Comparable To Glulams Of Similar Dimensions
  7. 7. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)  Increases Ix-x (Strength) By 4.5 To 5 Times  Sizes Possible From 6 to 48-Inches  Comparable To Glulams Of Similar Dimensions  Suitable For Buildings And Short-span Bridges
  8. 8. WOOD I-BEAMS FROM ROUNDWOOD  Dap Flanges As Shown, Or Flat All Four Sides  Uses Over 90% Of Material (For Ideal Round)  Increases Ix-x (Strength) By 4.5 To 5 Times  Sizes Possible From 6 to 48-Inches  Comparable To Glulams Of Similar Dimensions  Suitable For Buildings And Short-span Bridges  Excellent Use Of Bug-Killed Or Low Value Trees
  9. 9. WOOD I-BEAMS FROM ROUNDWOOD 9-Inch Test Specimens From 6-Inch +/- Roundwood
  10. 10. WOOD I-BEAMS FROM ROUNDWOODProperties and Additional Information Available 6” To 48”
  11. 11. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam
  12. 12. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges
  13. 13. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges 6-Inch Makes 2.5-Inch +/-
  14. 14. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges 6-Inch Makes 2.5-Inch +/- 8-Inch Makes 3.375-Inch +/-
  15. 15. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges 6-Inch Makes 2.5-Inch +/- 8-Inch Makes 3.375-Inch +/- 10-Inch Makes 4.25-Inch +/-
  16. 16. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges 6-Inch Makes 2.5-Inch +/- 8-Inch Makes 3.375-Inch +/- 10-Inch Makes 4.25-Inch +/- 12-inch Makes 5.125-Inch +/-
  17. 17. ZIG-ZAG SECTIONS FROM ROUNDWOOD Use Horizontally For Decking Glulam Or Nail-Lam Use Glulams Vertically Use For Buildings Or Bridges 6-Inch Makes 2.5-Inch +/- 8-Inch Makes 3.375-Inch +/- 10-Inch Makes 4.25-Inch +/- 12-inch Makes 5.125-Inch +/- Excellent Use Of Bug-Killed Or Low Value Trees
  18. 18. ZIG-ZAG SECTIONS FROM ROUNDWOOD Vertical Orientation Good For Joists and Beams
  19. 19. ZIG-ZAG SECTIONS FROM ROUNDWOOD Zig-Zag Decking Sample Showing Cuts and Layout
  20. 20. SUITABILITY FOR BRIDGE AND BUILDINGS Wood I-Beam And Zig-Zag Sections Especially Suitable For Trail And Short Span Bridge Configuration
  21. 21. SUITABILITY FOR BRIDGE AND BUILDINGS Wood I-Beam And Zig-Zag Sections Especially Suitable For Trail And Short Span Bridge Configuration Spans Would Be About 2X That For Roundwood Stock
  22. 22. SUITABILITY FOR BRIDGE AND BUILDINGS Wood I-Beam And Zig-Zag Sections Especially Suitable For Trail And Short Span Bridge Configuration Spans Would Be About 2X That For Roundwood Stock Wood I-Beam And Zig-Zag Sections Also Good For Buildings – Decking, Headers and Beams
  23. 23. Prototype evaluation
  24. 24. Assembly
  25. 25. Metriguard E-computer Director HM200 MOE dyn of I-beam (psi) 2.20E+06 MOEdyn = (ρ/g) x V2 1.80E+06 y = 1.0315x + 370781 R² = 0.8252 1.40E+06 1.00E+06 0.80 1.00 1.20 1.40 1.60 1.80 2.00 Million psi MOE of web member
  26. 26. Static testing
  27. 27. Failure modes
  28. 28. Failure modes
  29. 29. Estimated design valuesMOE (determined using stress wave velocity) 1,000,000 to 1,800,000 psiAve MOR = 7,317 psi 95th percentile = 5,167 psi Fb ≈ 2,460 psiAve fv = 871 psi 95th percentile = 616 psi Fv ≈ 290 psi
  30. 30. SUITABILITY FOR BRIDGE AND BUILDINGS Wood I-Beam And Zig-Zag Sections Especially Suitable For Trail And Short Span Bridge Configuration Spans Would Be About 2X That For Roundwood Stock Wood I-Beam And Zig-Zag Sections Also Good For Buildings – Decking, Headers and Beams

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