Chapter 4 - Properties of Wood and Lumber Grades

 

Objectives

  •  

Concepts

1.   Introduction Wood Handbook
2.   Design Specification
3.   Methods of Grading Structural Lumber 6, 7
4.   In-Grade Versus Clear Wood Design Values 5
5.   Species and Species Groups 2
6.   Cellular Makeup 2, 3
7.   Moisture Content and Shrinkage 4, 13
8.   Effect of Moisture Content on Lumber Sizes 13
9.   Durability of Wood and the Need for Pressure Treatment 14, 15, 18, 20
10.   Growth Characteristics of Wood 3, 5, 13
 -  shortleaf pine 5a - growth rings traced 
 -  shortleaf pine 5b - growth rings measured
 -  shortleaf pine 1 - growth rings measured
 -  shortleaf pine 3a - limb orientation & slices
 -  shortleaf pine 3c - slices photographed
 -  shortleaf pine 3b - slices measured
11.   Sizes of Structural Lumber 6
12.   Size Categories and Commercial Grades 6, 7
13.   General Notation
14.   Wet Service Factor CM 4
15.   Load Duration Factor CD  (ASD Only) 5
16.   Time Effect Factor λ  (LRFD Only) 5
17.   Size Factor CF
18.   Repetitive Member Factor Cr
19.   Flat Use Factor Cfu
20.   Temperature Factor Ct 4, 19
21.   Incising Factor Ci
22.   Resistance Factor Φ  (LRFD Only)
23.   Format Conversion Factor KF  (LRFD Only)
24.   Design Problem: Adjusted Design Values
25.   Future Directions in Wood Design

Problems

6e
Examples
6e
Homework
wood
definitions
  04.001 -- solution    
  04.002 -- solution    
  04.003 -- solution    
  04.004 -- solution    
  04.005 solution --    
  04.006 solution --    
  04.007 solution --    
  04.008 -- solution    
  04.009 -- solution    
  04.010 -- solution    
  04.011 -- solution    
  04.012 -- solution    
  04.013 -- solution    
  04.014 -- solution    
  04.015 -- solution    
adjustment
factor
definitions
  04.016   solution    
  04.017 solution -- LRFD  
  04.018 -- solution    
  04.019 -- solution    
  04.020 solution --    
  04.021 -- solution    
  04.022 solution --  LRFD  
  04.023 -- solution    
  04.024 -- solution    
  04.025 -- solution    
  04.026 -- solution    
  04.027 solution --    
adjustment-
factor
calculations
  04.028 -- solution    
  04.029 -- --    
  04.030 -- solution    
  04.031 -- -- LRFD  
  04.032 -- --    
  04.033 -- -- LRFD  
shrinkage   04.034 -- solution    
  04.035 -- --    
spreadsheet   04.036 -- --    
  04.037 -- --