[Gsbn] Fwd: Strength parameters for earthen slabs ?

[Dodson Harper]

Lars

We have also used these floors in many projects but have never had to 
document to the level that appears to be requested of you here. In one 
jurisdiction where we are forced to used interior shear walls instead of 
the resistance from exterior plastered walls, we pour very small strip 
footings of concrete below the shear walls that tie into our concrete 
grade beam below the exterior walls. Although this does use more 
concrete, it is very minimal and can be an easy way to satisfy a 
building official. See a couple of details below.

Dodson Harper, P.E. S.E.
Principal
REG
Resource Engineering Group
Direct: 970.713.0986
Cell: 970.209.3938
dodson at reginc.com
www.reginc.com


------ Original Message ------
From: "Global Straw Building Network" <gsbn at sustainablesources.com>
To: gsbn at lists.sustainablesources.com
Sent: 1/22/2020 10:52:20 PM
Subject: [Gsbn] Fwd: Strength parameters for earthen slabs ?

>
>
>---------- Forwarded message ---------
>From: Lars Keller<larskeller at gmail.com>
>Date: Wed, Jan 22, 2020 at 6:09 AM
>Subject: Strength parameters for earthen slabs ?
>To: Global Straw Building Network (private, with public archives) 
><GSBN at sustainablesources.com>
>
>
>Help wanted regarding strength parameters for earthen slabs.
>
>We are trying to get permission for a family house where instead of a 
>concrete slab we will use a local product consisting of 0-8mm sand 
>particles with clay.
>
>We have used it in many buildings, it works, but we have never 
>documented it officially.
>
>I have asked the engineer what exactly he needs to sign this off in a 
>legal manner.
>
>Can anyone help ?
>Best, Lars Keller
>
>PS: here is a link to the analysis of the earthproduct we use:
>
>https://smallplanetdk-my.sharepoint.com/:b:/g/personal/kontakt_smallplanet_dk/Eek52hjfts5GsgBu7gU4PBYBGfg4JE9r8T7RHoxcsuqyhw?e=5etIzb
>
>- - -
>
>Earthen floors
>A single-family house is designed where the usual concrete slab is 
>replaced with an earthen (clay) floor laid on top of a layer of crushed 
>seashells used as insulation. Our main issue is how well this earthen 
>floor can be used to transfer horizontal wind forces, as these are 
>usually transferred by a concrete slab.
>
>Regarding this we have a couple of questions:
>
>What strength parameters do we have for these kinds of floors? -  Such 
>as the characteristic compressive strength, Youngs’ modulus etc.
>
>Can the earthen floor slab be assumed to work as a diaphragm like a 
>concrete slab, or is it unable to transfer horizontal forces?
>
>
>
>We have provided a sketch of what we mean by the horizontal wind being 
>transferred through the slab
>
>If you have any questions or there are any unclarity in our questions, 
>please call at 40138786.
>
>
>
>
>
>
>Med venlig hilsen/ Kind Regards
>
>
>
>Jakob Keller
>ingeniør MMT, bygherrerådgiver og medindehaver
>
>E: jk at rbas.dk
>M: +45 2297 7222
>
>Emailsignatur med tekst-ny
>
>Se vores hjemmeside på www.reeholm-bredahl.dk
>
>For beskrivelse af vores behandling af persondata henvises til vores 
>hjemmeside <https://www.reeholm-bredahl.dk/persondata/>
>
>
>
>--
>Small Planet smba
>En sundere, smukkere og mere robust fremtid - sammen.
>
>T:  20240505
>M: kontakt at smallplanet.dk
>W: www.smallplanet.dk
>CVR 34725403
>
>Friland 12B 
><https://www.google.com/maps/search/Friland+12B+8410+R%C3%B8nde+Danmark?entry=gmail&source=g>
>8410 Rønde 
><https://www.google.com/maps/search/Friland+12B+8410+R%C3%B8nde+Danmark?entry=gmail&source=g>
>Danmark 
><https://www.google.com/maps/search/Friland+12B+8410+R%C3%B8nde+Danmark?entry=gmail&source=g>
>--
>--
>Kontakt-info
>skype
>jomorandin
>lars.friland
>jomorandin at gmail.com
>larskeller at gmail.com
>Home +45 8668 0505
>Jo      +45 2390 0924 (mobile/handy)
>Lars   +45 2024 0505 (mobile/handy)
>
>Jo Morandin, Jamilla, Asger & Lars Keller
>Friland 12 B
>8410 Rønde
>Danmark
>---
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