• To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
• From: "Lutz, James" <James.Lutz(--nospam--at)earthtech.com>
• Date: Thu, 16 Jun 2005 14:21:54 -0700
```I do it this way, too. One of the few fixes you have to make to the ACI
formulas for unit consistency. I heard somewhere that code writers are
trying to work towards more non-dimensional equation forms. That would also
solve the problem of separate equations for English and metric units.

-----Original Message-----
From: Gale45man [mailto:gale45man(--nospam--at)yahoo.com]
Sent: Thursday, June 16, 2005 1:53 PM
To: seaint(--nospam--at)seaint.org

One way to do this is to divide the variable by its
units and then multiply the result by the appropriate
units....

Ec := 57000 * psi * [(f`c/psi)^0.5]

d a v e e v a n s

I'm in the process of learning Mathcad and converting
some of my homemade Excel calculations.  I like to
have Mathcad keep track of units for me, unlike some
I've noticed.  But there's a problem when the units
don't work out, such as

Ec = w^1.5 (f'c)^.5

How do you handle that?  It seems like they would have
provided a method within the software for us to
manually "assign" units to an emperical formula in
just such a case.

John Riley

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