1. Dimensional Lumber 1 Presenters: F. Ostrander R. Tylock Dec. 2009

3. Walls

4. Floors

5. Roof

6. Pre-defined sizes

7. Cut Lumber

8. Finished Lumber

11. SPF

12. Spruce

13. Pine (yellow, white)

14. Fir (Douglas, Hem-Fir)

15. Hardwoods “Deciduous”“Not referring to hardness or density”

16. Dimensional Lumber 5 Definitions and Diagrams: Parallel-Grained Lumber The fibers run parallel to the axis of the lumber. Grain The direction, size, appearance, or quality of the fibers in wood or lumber Cross-Grained Lumber The fibers may run either diagonal or spiral grain or a combination of the two.

18. Density

19. Narrow the rings – stronger

20. Direction of Loading

21. Perpendicular to grain

22. Parallel to grain

23. Stress Type

24. Tension

25. Compression

26. Flexural

27. Horizontal Shear

28. Moisture Content

29. Strength up MC downCross Grain Parallel Grain

30. Dimensional Lumber Definitions and diagrams: 7 Pith Heartwood Sapwood

31. 8 Dimensional Lumber What are the typical allowable stress limits for different species? Must look at a table…

32. Dimensional Lumber How does one read a lumber grade stamp? 9

33. Dimensional Lumber What isthe moisture contentof dry and green lumber? 10 MOISTURE CONTENT MC = water weight in wood = % dry wood Dry Lumber 19% Green Lumber

34. Dimensional Lumber What typical preservatives are used to treat lumber for outdoor usage? 11 Water-Bourne Surface clean Low or odor free Oil-Bourne Significant odor Water resistant Products Sadolin K-33 ® CCA Penofin Linseed oil

35. Dimensional Lumber To think, this is where it all starts… 12