Dimensional Lumber<br />1<br />Presenters:<br /> F. Ostrander<br />R. Tylock<br />Dec. 2009<br />
Dimensional Lumber<br />What exactly is Dimensional Lumber?<br />2<br /><ul><li>Building Structures
Walls
Floors
Roof
Pre-defined sizes
Cut Lumber
Finished Lumber
Framing/Stud Lumber</li></li></ul><li>Dimensional Lumber<br />What is nominal versus actual standard sizes for Dimensional...
Dimensional Lumber<br />What are the different  types of wood species used in Dimensional Lumber?<br />4<br /><ul><li>Soft...
SPF
Spruce
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Dimensional Lumber

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Dimensional Lumber

  1. 1. Dimensional Lumber<br />1<br />Presenters:<br /> F. Ostrander<br />R. Tylock<br />Dec. 2009<br />
  2. 2. Dimensional Lumber<br />What exactly is Dimensional Lumber?<br />2<br /><ul><li>Building Structures
  3. 3. Walls
  4. 4. Floors
  5. 5. Roof
  6. 6. Pre-defined sizes
  7. 7. Cut Lumber
  8. 8. Finished Lumber
  9. 9. Framing/Stud Lumber</li></li></ul><li>Dimensional Lumber<br />What is nominal versus actual standard sizes for Dimensional Lumber?<br />3<br />Nominal:<br />Is where the lumber isn’t finished off<br />Actual:<br />Is finished and sanded down lumber<br />
  10. 10. Dimensional Lumber<br />What are the different types of wood species used in Dimensional Lumber?<br />4<br /><ul><li>Softwoods “Conifers/Evergreens”
  11. 11. SPF
  12. 12. Spruce
  13. 13. Pine (yellow, white)
  14. 14. Fir (Douglas, Hem-Fir)
  15. 15. Hardwoods “Deciduous”</li></ul>“Not referring to hardness or density”<br />
  16. 16. Dimensional Lumber<br />5<br />Definitions and Diagrams:<br />Parallel-Grained Lumber<br />The fibers run parallel to the axis of the lumber.<br />Grain<br />The direction, size, appearance, or quality of the fibers in wood or lumber<br />Cross-Grained Lumber<br />The fibers may run either diagonal or<br />spiral grain or a combination of the two.<br />
  17. 17. Dimensional Lumber<br />What is the difference between cross grain and parallel grain strength?<br />6<br /><ul><li>Species
  18. 18. Density
  19. 19. Narrow the rings – stronger
  20. 20. Direction of Loading
  21. 21. Perpendicular to grain
  22. 22. Parallel to grain
  23. 23. Stress Type
  24. 24. Tension
  25. 25. Compression
  26. 26. Flexural
  27. 27. Horizontal Shear
  28. 28. Moisture Content
  29. 29. Strength up MC down</li></ul>Cross Grain<br />Parallel Grain<br />
  30. 30. Dimensional Lumber<br />Definitions and diagrams:<br />7<br />Pith<br />Heartwood<br />Sapwood<br />
  31. 31. 8<br />       <br /> <br />Dimensional Lumber<br />What are the typical allowable stress limits for different species?<br />Stress is the amount of force for a given unit of area.<br />Typically measured in pounds per square inch (psi).<br />Here is a partial table to review,<br />A thorough chart is on Wiki site …<br />
  32. 32. Dimensional Lumber<br />How does one read a lumber grade stamp?<br />9<br />Example.1<br />Grade Rubber Stamp<br />Agency Mark<br />Mill Identification<br />Grade Designation<br />Species Mark<br />Moisture Content<br />
  33. 33. Dimensional Lumber<br />What is the moisture contentof dry and green lumber?<br />10<br />MOISTURE CONTENT<br />MC = water weight in wood = %<br /> dry wood<br />Dry<br />Lumber<br />19%<br />Green<br />Lumber<br />
  34. 34. Dimensional Lumber<br />What typical preservatives are used to treat lumber for outdoor usage?<br />11<br />Water-Bourne<br />Surface clean<br />Low or odor free<br />Oil-Bourne<br />Significant odor<br />Water resistant<br />Products<br />Sadolin<br />K-33 ® CCA<br />Penofin<br />Linseed oil<br />
  35. 35. Dimensional Lumber<br />To think,<br /> this is where it all starts…<br />12<br />
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