Re: design help with dome house problems - low income

"Keith W" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> >
> > I don't disagree with that analysis, EXCEPT that the domes you mentioned
> > are cast in place concrete ribbed domes.  Our original poster wants to
> > make his dome out of precast slabs that have no connection between the
> > pieces except some simple keys to keep the pieces from slipping past
> > each other.  Remember that in snow igloos the blocks can be pressed
> > together to get some continuity in the "members".
> >
> St Pauls was constructed of 'masonry, brick, timber and cut stone' and St
> peters was also made of brickwork - probably without conventional centring,
> but there is much argument as to how it was constructed.  These post date
> the Pantheon, which *was* constructed in concrete.  Concrete from that time
> would be expected to have very little tensile strength, however, and would
> behave in a similar fashion to masonry.  My mental image of the construction
> suggested was of concrete blocks - rather like large bricks - rather than
> 'slabs' as you mention.  May be my mental processes are a bit out!  (many
> people say they are)  8-)
> 
> Keith
> Civil Solutions


your right concrete blocks 18" or so squareon the outside and 17" or
so on the inside... with a keyway or some form of anti slip mechanism,
like mabye a 3" deep hole 1" in diameter that we mate 2 blocks
together and place a 6" #3 rebar and mortar the hole shut.

George