[Cob] Rebar

[Janet Standeford]

Thank you, Frank I think this is fascinating.

I distinctly recall that there was some testing done in British Columbia,
> maybe UBC, on a cob structure.  I think that it was mentioned on the
> coblist as much as 6 or 7 years ago.
>
> I also found the following on a quick search.
>
> New Zealand, fortunately, now has a comprehensive suite of earth building
> standards. This means that any building designed and built in accordance
> with them automatically meets many provisions of the NZ Building Code.
> The Standards are:
> NZS 4297:1998. Engineering Design of Earth Buildings (Specific Design)
> NZS 4298:1998. Incl Amendment#1 2000 Materials and Workmanship for Earth
> Buildings
> NZS 4299:1998. Incl Amendment#1 1999 Earth Buildings Not Requiring
> Specific Design.
>
> They cover only those techniques that have been well investigated and used
> during the current 30 year long renaissance in earth building in NZ, namely
> mud brick, rammed earth, pressed earth brick, and to a limited degree,
> poured earth. Historic and rare methods are not covered although there is
> some information given on some new methods (in-situ adobe) or old methods
> (cob) currently under revival. There is also some information on earth
> floors, and plasters.
>
> NZS 4297 “Engineering Design of Earth Buildings (Specific Design)” is for
> engineers and gives the data and formula required to successfully engineer
> earth walled buildings. It is a specialist document for use by structural
> engineers.
>
> NZS 4299 “Earth Buildings Not Requiring Specific Design” is not a “cook
> book” as such, but is essential for earth building designers. It allows the
> design of relatively simple earth buildings that fall within its limits
> without requiring specialist engineering. There are many building details
> given, and bracing values for various types of earth walls from
> unreinforced through to totally reinforced earth walls, bond beam sizes and
> fixings, foundations, window jamb, head and sill details etc.
>
> Sincerely yours,
>
> Frank
>
>
>
>
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