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# Re: Alternate Design Method

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Alternate Design Method
• From: Scott Maxwell <smaxwell(--nospam--at)engin.umich.edu>
• Date: Wed, 2 May 2007 16:19:41 -0400 (EDT)

```Jim,

The basics are there.  If you understand the basics of WSB flexure (i.e.
can draw the strain diagram, corresponding stress diagram, and then draw a
FBD with resultants C and T and know what C and T are equal to), then you
can add in the axial load into the FBD should be able to go from there.
More than likely you should be able to find such a situation in a masonry
textbook.

That covers the basic principles.  But, you need to ensure that the code
provision actually match and use basic principles as well as what the code
uses as allowable stress values assuming it does use basic principles.

Regards,

Scott

On Wed, 2 May 2007, Jim Bessley wrote:

> Robert and Michael,
> Thank you for the replies.  I do, however, have this information and have
> used it before.  I am looking for is an example for combined bending and
> axial load.  I have used the masonry text before, but I don't think it the
> axial load capacity calculations will be the same.
> Thanks for your time.  I do appreciate it.
> Jim
>
> On 5/2/07, Garner, Robert <rgarner(--nospam--at)moffattnichol.com> wrote:
> >
> >  I recall you have to check the allowable bending moment based on
> > allowable concrete stress, also:
> >
> >
> >
> > M = 0.5 * f'c * j * k * b * d^2
> >
> >
> >
> > Correct me if I'm wrong.  It's been a long, long time.
> >
> >
> >
> > You could also get a masonry design book.  Masonry WSD is just like
> > Concrete WSD.
> >
> >
> >
> > Bob Garner, S.E.
> >
> >
> >
> >
> >
> > R. Garner
> >
> > Moffatt & Nichol
> >
> > Tel.:  (619) 220-6050
> >
> > Fax.: (619) 220-6055
> >
> > e-mail: rgarner(--nospam--at)moffattnichol.com
> >
> >
> >  The information contained in the e-Mail, including any accompanying
> > documents or attachments, is from Moffatt & Nichol and is intended only for
> > the use of the individual or entity named above, and is privileged and
> > confidential. If you are not the intended recipient, be aware that any
> > disclosure, dissemination, distribution, copying or use of the contents of
> > this message is strictly prohibited. If you received this message in error,
> >
>

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