Gary Hodgson
Alex C. Nacionales wrote:
> This used to be my college textbook:
>
> Essentials of Soil Mechanics and Foundation
> By : Andrew McCarthy
>
>
> This books discusses the 60 degree aproximation for
> estimating soil pressures below a footing.
> and also has formulas to solve Stress increase in Soils below a
> foundation due to foundation loading using:
>
> Boussinesq formula----for homogeneous soils
> Westergaard formula--layered soils.
>
>
> Alex C. Nacionales
>
>
> ----- Original Message ----- From: "Gary L. Hodgson and Assoc."
> <ghodgson@bellnet.ca>
> To: <seaint@seaint.org>
> Sent: Tuesday, August 28, 2007 8:00 PM
> Subject: Re: Another Reference needed
>
>
> I am hoping I can jump on the band wagon here. (That is not a very
> gooood analogy). I am looking for a reference on the effect of higher
> footings close to existing footings. One of my customers is supplying a
> 5 ton crane and runway to be installed in an existing building. The
> engineer for the building owner is insisting that the runway columns be
> placed midway between the existing columns so as to avoid any
> super-imposition of loads on to existing footings. My customer is
> stating, with my support, that the bearing pressure from the new crane
> column is reduced considerably (with a large column bearing plate) by
> the time the additional pressure reaches the underside of the existing
> footings (here all footings exposed to freezing have to be at least 4 ft
> below grade. The building owner is on my customer's side in this
> dispute-he does not want more columns fouling up his floor space. I feel
> comfortable with what we are proposing but I want to be able to quote
> some references on this topic. Any help would be appreciated and thanks
> in advance for your trouble.
> Gary Hodgson
>
>
> IRV FRUCHTMAN wrote:
>> Dennis:
>> A book I've found helpful and not expensive is:
>> "Design of Shallow Foundations" by Samuel French, ASCE
>> Press. But its paperback and the print is small. Good Luck,
>> Irv
>>> I'm looking for a back to basic soils or foundation
>>> design manual to help me
>>> work out the algorithms that I need to write the
>>> spreadsheet. I think I
>>> understand how to find the center of mass based on
>>> the load distributions
>>> but would like to compare it against a text. My
>>> foundation design manuals
>>> that I used in school seem more than complicated and
>>> I am looking for
>>> something fairly straight forward.
>>>
>>>
>>> If I would prefer, I would also like the text to
>>> cover other types of
>>> foundations; continuous wall foundations; friction
>>> piles, spread footings
>>> that are used installed below an existing foundation
>>> (remodeling situation);
>>> distribution of shear from eccentric loading
>>> conditions where new
>>> foundations are doweled or added to the existing
>>> etc.
>>>
>>>
>>> Please post your favorite references for foundation
>>> design. I think the
>>> Retaining wall reference published by Huge Brooks is
>>> the best I've seen and
>>> I use this as a primer to refresh my memory on
>>> retaining wall design, but
>>> for the other conditions I am seeking a text rather
>>> than a reference for a
>>> computer program that will do the work for me.
>>>
>>> One of the problems with relying on computer
>>> software that I take for
>>> granted because I write most of my own tools is
>>> writing one that you have
>>> been used to designing by shortcut (for example a
>>> grade beam that takes the
>>> moment from each end at the base of a moment frame).
>>> I've designed these
>>> using a half page or less shortcut, but I want to
>>> restore my understanding
>>> of the basics as I have always done with code
>>> programs such as MultiLat™
>>> that assisted me to understand what was in the mind
>>> of the code writer while
>>> I was recreating the spreadsheet.
>>>
>>>
>>> At nearly sixty years old, I am not too proud to
>>> want to return to the
>>> basics and admit that I forgot some of my elemental
>>> skills. Help me restore
>>> my memory by suggesting the reference that you use
>>> when you need to do an
>>> analysis manually that you have not done for a long
>>> time.
>>>
>>>
>>> Thanks
>>>
>>> Dennis
>>>
>>>
>>> Dennis S. Wish, PE
>>>
>>> California Professional Engineering – C 41250 Exp
>>> 03/31/09
>>>
>>> Structural Engineering Consultant
>>>
>>> La Quinta California
>>>
>>>
>>> No virus found in this outgoing message.
>>> Checked by AVG Free Edition. Version: 7.5.484 / Virus Database:
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>>> Release Date: 8/25/2007
>>> 5:00 PM
>>>
>>>
>>
>>
>>
>>
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