1. Lumber Grades Copyright © Texas Education Agency, 2011. All rights reserved.

2. 2 Lumber Dimensions What are the dimensions of this board? “ 2 X 4 “ Someone measure it for me. “ 1 ½ X 3 ½ “ Why are there two different sets of numbers?

3. Copyright © Texas Education Agency, 2011. All rights reserved.3 Nominal 2 x 4 1 x 6 2 x 8 1 x 2 Two by Six 1 x 12 One by Four 4 x 4 6 x 12

4. Copyright © Texas Education Agency, 2011. All rights reserved.4 Actual 1 ½ x 3 ½ 1 ½ x 5 ½ 1 ½ x 7 ½ ¾ x 1 ½ One and a half by five and a half. ¾ x 11 ¼ ¾ x 3 ½ 3 ½ x 3 ½ 5 ½ x 11 ¼

5. Copyright © Texas Education Agency, 2011. All rights reserved.5 Nominal VS. Actual Nominal 2 x 6 Actual 1 ½ x 5 ½ Nominal 2 x 8 Actual 1 ½ x 7 ½ Is there a pattern? 2 X 10 and 2 x 12 Actual 1 ½ x 9 1/4, 1 ½ x 11 1/4

6. Copyright © Texas Education Agency, 2011. All rights reserved.6 Lumber Size Chart

7. Copyright © Texas Education Agency, 2011. All rights reserved.7 Grading Terms Boards – Consists of members up to 1 ½ “ thick and 2 “ and wider Light Framing – Consists of members 2” to 4” thick and 2” to 4” wide.

8. Copyright © Texas Education Agency, 2011. All rights reserved.8 Grading Terms Joists – Consists of members 2” to 4” thick and 6” or wider. Beams – Consists of members 5” and thicker by 8” inches and wider

9. Copyright © Texas Education Agency, 2011. All rights reserved.9 Grading Terms Posts and Timbers – Consists of members 5” x 5” and greater, approximately square.

10. Copyright © Texas Education Agency, 2011. All rights reserved.10 Grade Stamps

11. Copyright © Texas Education Agency, 2011. All rights reserved.11 Grade Stamp The Grading Agency This symbol indicates which agency is certifying the quality of the lumber.

12. Copyright © Texas Education Agency, 2011. All rights reserved.12 Grading Stamp The Species of Lumber Indicates species by individual species or species combination.

13. Copyright © Texas Education Agency, 2011. All rights reserved.13 Grade Stamp The Grade The grade designation: Grade name, number, or abbreviation. Indicates the quality of the material.

14. Copyright © Texas Education Agency, 2011. All rights reserved.14 Grade Stamp The Mill Identification Firm name, brand, or assigned mill number. Allows the agency to identify the individual mill whenever necessary.

15. Copyright © Texas Education Agency, 2011. All rights reserved.15 Grade Stamp The Moisture Content Condition of seasoning: Indicates the condition of seasoning at the time of surfacing.

16. Copyright © Texas Education Agency, 2011. All rights reserved.16 Grading Chart

17. Copyright © Texas Education Agency, 2011. All rights reserved.17 Grading Lumber Class Construction Standard Utility

18. Copyright © Texas Education Agency, 2011. All rights reserved.18 Grading Lumber Class Select Structural Grade 1 2 3 Stud

19. Copyright © Texas Education Agency, 2011. All rights reserved.19 In Summary: What is the difference between a nominal and an actual dimension? At what lumber size does the pattern for lumber dimensions change? What are the common similarities between the 1 x 4 and the 2 x 4? Give one part of the Grade Stamp.