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Re: Retaining wall of sawdust

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Can you please clarify your IFP recommendations?

Thank you,

Steve Gordin SE

SGE Mobile

> On May 13, 2015, at 16:12, Lloyd Pack, P.E. <lloyd(--nospam--at)> 
> wrote: 
> Hello Joe,
> You'd find the friction angle the same way that you'd do it for
> soils.  Either direct shear test or a triaxial test.  You can get a
> pretty good idea from the natural angle of repose of the material,
> if it's being loaded in a pile that is feed by a conveyor belt and
> dropped.  It's like a cone shaped pile of sand, the angle of the
> sides of that cone with the horizontal is the natural angle of repose
> and very close to the friction angle for that material.
> In a confined situation the internal angle of friction is a little higher
> than the natural angle of repose, so using the angle of repose is
> conservative.
> As for using an equivalent fluid pressure, EFP, you kind of need to
> know what the wood species is if you want to be close.  If you use
> the loading for soils in your area you'd be fine unless you've got
> some really, really light weight soils.  Soil that is about 110 pcf will

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