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# Re: Sorry Mathcad question (delete if you don't want to read)

• To: <seaint(--nospam--at)seaint.org>
• Subject: Re: Sorry Mathcad question (delete if you don't want to read)
• From: "Laura Watson" <lwatson(--nospam--at)alltel.net>
• Date: Wed, 1 Nov 2000 09:18:41 -0500

```Wherever your expression for shear equals zero along the beam, the moment
in the beam is at a maximum or a minimum, i.e. dM/dx =0, since shear is the
rate of change of moment.
If you draw a moment diagram for your beam from, say, left to right, and
the shear diagram changes from positive to negative, the moment will be at
a positive maximum where the shear diagram changes from positive to
negative. There are cases, however, where this will not apply, like a
maximum shear occur at the fixed end of the beam.

Laura H. Watson, P.E.

----------
> From: Rodriguez, Marlou <mrodriguez(--nospam--at)BiggsCardosa.com>
> To: 'SEAINT Newslist' <seaint(--nospam--at)seaint.org>
> Subject: Sorry Mathcad question (delete if you don't want to read)
> Date: Tuesday, October 31, 2000 12:31 PM
>
> Sorry this is a mathcad question,
>
> I am trying to find the maximum moment on a beam with several loads.
>
> I have writen a function to plot the moment diagram,
>
> My question is, How do I extract the maximum moment out of my moment
> function.
>
> Thanks to all the mathcad masters
>
> *************************************************************
> Marlou B. Rodriguez
> Biggs Cardossa Associates Inc.
> Structural Engineers
> 1871 The Alameda, Suite 200
> San Jose, California 95126
> 408-296-5515 Fax 408-296-8114
>
> Note:  The opinions that I write are my opinions and
> are not necessarily the opinions of BCA.
> *************************************************************
>
>

```