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Re: Alternate design method

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Sorry for the confusion.  Appendix A in the ACI 318-95 Code.  Section A.6 (and the associated commentary RA.6) states that compression members with or without flexure must be proportioned using the strength design methods from chapter 10 and that capacities are to be taken as 40% of those from chapter 10.  Section A.2.1 says load factors and reduction factors are to be taken as unity.  I haven't had to do a lot of wall design in concrete, and I don't have any references or texts that provide an example for this situation with compression and bending using the appendix.

On 5/1/07, Gary Loomis <gloomis(--nospam--at)> wrote:

Old "alternate design method".  Do you mean working stress design?


Gary W. Loomis, P.E., Senior Structural Engineering

Master Engineers and Designers, Inc.

-----Original Message-----
From: Jim Bessley [mailto:jbessley(--nospam--at)]
: Tuesday, May 01, 2007 4:45 PM
Subject: Alternate design method


I have to look at a wall section using the old "alternate design method" in concrete.  The wall section will have both lateral and axial loads.  It has been a very long time since I used this method, if ever.  does anybody out there have an example that I can get from you that will explain the process.  The "99 ACI code uses strength design with different phi and load factors, which have me confused. 

Any help would be appreciated.
Jim B.