Chuck explained common US construction. The only thing I can add is
that the width of the rafter depends upon it's length. The width
prevents excessive bowing when weight is applied to the center of the
rafter. It probably doesn't take a very large tenon to support the
weight that typical toe-nailing will support.
-jeff
On Thu, Mar 27, 2008 at 2:02 PM, swisspace <swisspace@xxxxxxxxx> wrote:
> apologies if you get this twice but it seems my isp smtp servers playing up.
>
>
>
> Cool, when you have finished do you fancy popping over to switzerland to
> help me do my carport roof 5m by 7m with apex roof ;-)
>
> Piers Hemy wrote:
> > Funnily enough, I looked in on a wooden-barn-construction weekend-course
> >
> >
>
> Your reasoning
> > On that slim experience I hereby claim to be an expert!
> >
> > I assume you mean the cross beam is mortice-and-tenon jointed into the
> > wall
> > beam? http://en.wikipedia.org/wiki/Woodworking_joints may help
> > beam. Thus a relatively small tenon on the end of the wall beam
> > will reduce
> > the strength of the wall beam significantly less than one which is
> > half the
> > height of the wall beam.
> >
> Aha yes it is as you describe and I follow your logic and reasoning, I
> am just suspicious now of such people after having a flat roof done on
> my garage in the UK and thinking to myself why doesn't he seal up the
> sides otherwise its going to leak, but assumed he new what he was doing
> - It leaked and I regretted not saying something at the time.
>
> The standards and training are very high in Switzerland however this
> makes everything that involves labour very very expensive but I guess it
> means I can trust them to get on with the job :-)
>
>
>
>
>
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