Audience
This textbook presents an introduction to reinforced concrete design. We authors hope the
material is written in such a manner as to interest students in the subject and to encourage
them to continue its study in the years to come. The text was prepared with an introductory
three-credit course in mind, but sufficient material is included for an additional three-credit
course.
New to This Edition
Updated Code
With the ninth edition of this text, the contents have been updated to conform to the 2011
Building Code of the American Concrete Institute (ACI 318-11). Changes to this edition of the
code include:
• Factored load combinations are now based on ASCE/SEI 7-10, which now treats wind
as a strength level load.
• Minor revisions to development length to headed bars.
• Addition of minimum reinforcement provisions to deep beams.
• Introduction of Grade 80 deformed bars in accordance with ASTM 615 and ASTM 706.
• Zinc and epoxy dual-coated reinforcing bars are now permitted in accordance with ASTM
A1055.
New Chapter on Concrete Masonry
A new chapter
on strength design of reinforced concrete masonry has been added to replace the
previous Chapter 20 on formwork. Surveys revealed that the forms chapter was not being used
and that a chapter on masonry would be more valuable. Because strength design of reinforced
concrete masonry is so similar to that of reinforced concrete, the authors felt that this would be
a logical extension to the application of the theories developed earlier in the text. The design
of masonry lintels, walls loaded out-of-plane, and shear walls are included. The subject of this
chapter could easily occupy an entire textbook, so this chapter is limited in scope to only the
basics. An example of the design of each type of masonry element is also included to show
the student some typical applications.
Units Added to Example
Problems
The example problems now have units associated with the input values. This will assist the
student in determining the source of each input value as well as help in the use of dimensional
analysis in determining the correct answers and the units of the answers. Often the student
can catch errors in calculations simply by checking the dimensions of the calculated answer
against what the units are known to be. 
Organization
The text is written in the order that the authors feel would follow the normal sequence of
presentation for an introductory course in reinforced concrete design. In this way, it is hoped
that skipping back and forth from chapter to chapter will be minimized. The material on
columns is included in three chapters (Chapters 9, 10, and 11). Some instructors do not have
time to cover the material on slender columns, so it was put in a separate chapter (Chapter
11). The remaining material on columns was separated into two chapters in order to emphasize
the difference between columns that are primarily axially loaded (Chapter 9) and those with
significant bending moment combined with axial load (Chapter 10). The material formerly in
Chapter 21, “Seismic Design of Concrete Structures,” has been updated and moved to a new
appendix (Appendix D).
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