In article ,
Roger wrote:
The message
from The Natural Philosopher contains these words:

It seems that the 'purlins' in this case ARE propped - at the gable
ends.

Which was the nature of purlins in domestic house construction in this
country until very recently. (Although I don't accept that the
horizontal ties in truss roofs are purlins).

And the roof is not a trussed roof at all.

No idea why you should have thought it was in the first place. There is
nothing in Simons original post to suggest a loft stuffed full of
struts.

And nothing in your early posts to suggest you were confining your
remarks to a trussed roof either.

A trussed roof will have very much smaller joists and rafters anyway - so
totally unsuitable for an attic room. Which is why converting a modern
house is so much more expensive than an older one - you effectively have
to replace the lot.

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Dave Plowman London SW
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