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RE: GSBN:Low Tech SB wall
- To: "GSBN" GSBN@...
- Subject: RE: GSBN:Low Tech SB wall
- From: "Jeff Ruppert" jeff@...
- Date: Tue, 18 Feb 2003 13:21:09 -0700
- Reply-to: "GSBN" GSBN@...
- Sender: "GSBN" GSBN@...
One of the best things to come out of our testing of walls in compression
was that we did not use pins or mesh on some of the walls, and they turned
out to be the strongest. It has been this type of data that has let us use
only the materials we feel are needed to acheive any particular solution.
By incorporating the pins at the top and bottom, I think the results will
only reflect how some people build bale walls. This certainly is not how we
build them, and therefore the results will be rather useless to us. If your
walls did not have pins, pins could be incorporated, if necessary, to help
persuade a reluctant building official, but certainly not the other way
around. I am also not clear as to the use of SIP screws, but again, my
comment is keep it simple! The results will have the widest benefit.
Jeff Ruppert, P.E.
Odisea Engineering, Planning and Consulting
2241 17th St.
Boulder, CO 80304
> -----Original Message-----
> From: GSBN [mailto:GSBN@...]On Behalf Of tim
> Sent: Monday, February 17, 2003 4:26 PM
> To: GSBN
> Cc: bill@...
> Subject: GSBN:Low Tech SB wall
> hello all,
> We are winding down the testing portion of the EBNet's straw bale
> construction testing program and we will be building the cyclical in-plane
> test walls in Illinois over the next three weeks. Without going in to the
> details, we are testing 3 earth plastered walls and 3 cement/lime stuccoed
> walls (quickrete exterior stucco). Each of these sets range from
> simplest/most common to reasonably engineered to over engineered. ;-)
> The question that I would like input on is the top plate and base
> for the simplest earth plastered wall. In California we don't have much
> occasion to build with this commonly built wall. We really want
> to avoid the
> folly of a silly solution that everyone will have to replicate. We will
> strap the wall with poly every two feet. This however does not seem to be
> So here is what we're considering:
> Mesh wraped under the sill and over the box beam that just covers
> the first
> and top course of bales. ( most logical for us mesh happy balers though if
> you're gonna mesh top and bottom you might as well go all the way.
> unfortunately that is our mis range wall.
> 16d galvinized nails 4" on center imbedded only one inch into the
> plates and
> box beam.
> Developing a decent way to hold onto the top and bottom plates
> with exterior
> bamboo pins
> Imbalers, wood 2x2 top and rebar bottom (I really like to avoid
> this but it
> has been done quite a bit)
> 16-18" Sip screws with wide washers installed after the first
> course and on
> an angle up into the box beam (something I've tried with window bucks)
> Also, if someone will be near the Urbana, Illinois testing site and could
> help plaster let me know.