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15 Oct 14: Applications in Use, VII--It adds up


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Some of the most insidious and pervasive cases of over-designed installations are those that are a compounding of safety factors.


It works like this.  One person orders a piece of equipment.  An engineer then asks the supplier of this equipment what the loading is on each anchor pad.  The equipment supplier, not wanting to get into trouble, makes a rough calculation, doubles it, and sends it to the engineer.  The engineer takes a look at it, and not wanting to have a problem, doubles it again.  If this happened to be a structure in the air, it might then be sent to a foundation designer, who, you guessed it, doubles it again.


The result is a waste of concrete and steel beyond all reasonable safety factors.


If you have overall responsibility for a project, challenge these matters--require each entity in the process to show you the calculations that they used to derive the numbers they pass down the line.  You will save serious money.


Comments? Please send an email to [email protected]
with "LGMI Frontiers" in the subject line.   



LGMI Design Practices
As always, your comments will be appreciated.
Think light!


Brian Brogdon, Ph.D.
Executive Director




Jim Thompson

Send us your comments by emailing Brian Brogdon
or Jim Thompson!




LGMI Weekly Ideas are presented for your consideration and inspiration only.  It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing.  Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.

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