TABLE OF CONTENTS The comprehensive listing of adjustment factors given in Sec. 6.2 for determining 
is a general summary, and not all of the factors apply to all beams. The purpose of this section is to identify the adjustment factors required for specific applications. In addition, a number of the adjustment factors that frequently default to unity are noted.
Some repetition of material naturally occurs in a summary of this nature. The basic goal, however, is to simplify the long list of possible adjustment factors and to provide a concise summary of the factors relevant to a particular type of beam problem. The objective is to have a complete outline of the design criteria, without making the problem appear overly complicated. Knowing what adjustment factors default to unity for frequently encountered design problems should help in the process.
The allowable bending stresses for sawn lumber are given in Example 6.10. The example covers visually graded sawn lumber, and bending stresses apply to all size categories except Decking. The grading rules for Decking presume that loading will be about the minor axis, and published values are F by. The flat use factor C fu has already been applied to the tabulated F b for Decking.
EXAMPLE 6.10 Allowable Bending Stress Visually Graded Sawn Lumber
The allowable bending stresses for sawn lumber beams of rectangular cross section are summarized in this example. The common case of bending about the strong axis is covered first. See...
