Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: RE: Rockery Retaining Walls

[Subject Prev][Subject Next][Thread Prev][Thread Next]
It's comments like this discourages communication and degrades the 
viability of this list.  Some of us living in the southwest aren't 
accustomed to the term "rockery wall" much less a "two man rock"  I suspect 
that Mr Schenk isn't overly familiar with adobe or vega construction. 
 Realize that some of these terms are regional and be open about sharing 
the knowledge.  I'm sure that I could have researched it but I was looking 
for responses here.   Perhaps, Rod, the reason contractors are laughing at 
you is that you are so quick to jump to narrow minded (and erroneous) 
opinions of people and things you don't know rather than admitting there 
just may be something you don't know.  I'm certain that I wouldn't be 
having that beer with you, they don't make bar stools as high as that 
pedestal you've put yourself on.  And it's lose, not loose.  Pick up a 
dictionary now and then
I think that I'll sit out of the list for a while... a bit stuffy in here.
-----Original Message-----
From:	Rod Schenk [SMTP:rs(--nospam--at)]
Sent:	Wednesday, January 13, 1999 1:16 PM
To:	seaint(--nospam--at)
Subject:	RE: RE: Rockery Retaining Walls

Well Engineers, its sounds like some of you are spending too much time in
the text books and not enough time out in the field.  I live in the Great
North West and I admit that coming originally from back East that the term
"One Man Rock" or "Two Man Rock" was new to me. But being as smart as we
engineers think we are it took about 2 seconds to understand what the term
meant.  I don't mean to offend anyone but we all must try to think a little
out side the realms of poisson's ratio and Integrations for Virtual Work.
It's no wonder contractors laugh at engineers!  Come on guy's loose the
pocket protectors.  I am not saying we should compromise our design
integrity but we should make a good effort to live and engineer in the real
world!  An engineer gains respect by understanding and working with
contractors, associates and yes, even architects.  One does not gain 
by quoting some fancy interaction formula or some specifying outrageous
elaborate concrete mix design that increases f'c by 5%.  The only respect I
would give to such an individual is as much as I give to my old University
Engineering Mechanics Text Book - I like to reference it sometimes but I
wouldn't want to drink a beer with it after hours.

> -----Original Message-----
> From: tbenson(--nospam--at) [mailto:tbenson(--nospam--at)]
> Sent: Wednesday, January 13, 1999 10:14 AM
> To: seaint(--nospam--at); seaint(--nospam--at)
> Subject: Re:RE: Rockery Retaining Walls
> Is there such a thing as a "one man rock"?  As a Geotechnical Engineer, I
> suppose I should know the answer.  But I don't (not in ASTM D
> 653-97).  I hope
> the original author will define this, and describe the origin of their
> definition.  My hypothesis is that it is a boulder which requires
> 2 to 3 workers
> to move.  How powerful are the "men" and how far do they have to
> move it remains
> a mystery.  Can we convert that to Newtons or Joules, or should
> it be a unit of
> mass?  A boulder is precisely defined as "a rock fragment,
> usually rounded by
> weathering or abrasion, with an average dimension of 12 inches
> (305 mm) or more"
> (ASTM D 653-97).
> On the more serious side, I agree that this "retaining wall"
> probably should be
> designed as a gravity wall, and will require a sloping face.  The
> slope face
> will be a function of the interlocking ability of the boulders
> (or angle of
> repose).  Although the previously mentioned 0.25:1
> (horizontal:vertical) face is
> common for crib walls and the like, this may not be very stable
> for well rounded
> boulders, depending upon the composition and geometry of the
> boulders.  What is
> the consequence of failure of this wall?  Not to overanalyze or
> over-engineer
> the problem, but if you must carefully engineer this wall, the
> most formidable
> problem is to define the strength and interlocking characteristics of 
> boulders, including durability.  I will say this, a boulder wall
> probably drains
> well, and if the boulders are durable, will work well on
> shorelines.  You may
> also contain the boulders in cribs (reinforced concrete or metal), or in
> gabions. (Gabion is not in ASTM D 653-97, but is in my 1973 Webster's New
> Collegiate Dictionary.)
> Tom Benson at Lowney Associates
> Pasadena, CA  (626) 396-1490
> tbenson(--nospam--at)
> ____________________Reply Separator____________________
> Subject:    RE: Rockery Retaining Walls
> Author: <seaint(--nospam--at)>
> Date:       1/13/99 9:33 AM
> I sure hope someone answers this so that I don't have to show my
> ignorance too.
> -----Original Message-----
> From:        Charley Hamilton [SMTP:chamilto(--nospam--at)]
> Sent:        Tuesday, January 12, 1999 4:05 PM
> To:        seaint(--nospam--at)
> Subject:        Re: Rockery Retaining Walls
>         I must admit ignorance (no surprise to anyone out there,
> I'm sure).
> What exactly is a 2 to 3 man rock rockery wall?  Perhaps the
> question I really
> want answered is "What is a 2 to 3 man rock?"
>         Charley
> ---------
> Charles Hamilton, EIT                                Phone:
>  949.824.8257
> (office)
> Graduate Student
> 949.856.2797 (home)
> Department of Civil and                         FAX:        949.824.8694
> Environmental Engineering                        Email:
> chamilto(--nospam--at)
> University of California, Irvine