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Re: Coefficient of Friction
- To: "<seaint(--nospam--at)seaint.org>" <seaint(--nospam--at)seaint.org>
- Subject: Re: Coefficient of Friction
- From: sgeconsulting <sgordin(--nospam--at)sgeconsulting.com>
- Date: Sat, 28 Aug 2010 15:36:42 -0700
This is true, but as we know, lateral bearing provides less resistance than friction - at least, for heavy equipment pads. Tricky...
That is why “footings” have to be buried into the soil where lateral
forces are at least partially resisted by lateral resistance of the soil; not
to mention the added weight of the concrete itself.
Richard Hess, S.E.
Sent: Saturday, August 28, 2010 1:18 PM
Subject: Re: Coefficient of Friction
The code implicitly disallows the use of friction to resist
seismic forces, hence the use of "self-anchored" tanks does not
appear a great idea. Besides, such tanks will be quite susceptible to wind when
That said, we routinely use friction between the footings
and the soil to resist seismic forces. How does that work from the code and
just rational standpoints?
will not work if it is in earthquake country. The vertical forces will
dance it all over the place.
From: Paul Blomberg
Sent: Friday, August 27, 2010 12:49 PM
Subject: Coefficient of Friction
I have a client that wants their
product tanks installed without anchorage (self-anchored) and I am trying to
locate a coefficient of friction between the tanks (fiberglass and plastic
tanks) and their base (concrete and gravel pads). All these tanks are
flat bottomed and supported on grade.
Does anyone have a reference with
this information so I can check sliding?