Mansard roof open to ridge in attefall house

[muchcup]

I have been thinking about building an Attefall house where I want to utilize the maximum building height to furnish a loft. I am drawn to the shape of a mansard roof and believe it would provide the most ceiling height (disregarding flat/half-flat roofs which I dislike). However, when I look at the general construction of a mansard roof, you often lose some space at the ridge and on the sides of the truss construction. Is it possible to create such a construction to offer more space in height and on the sides?

This is what a classic construction looks like http://www.byggahus.se/forum/attachment.php?attachmentid=35452&stc=1&d=1263979973

Is there a generally accepted construction, perhaps with laminated beams and possibly some pillars, that eliminates the truss construction typical in a classic roof? I have read about some of the constructions, but it's not fresh in my memory; I know at least that the loads need to be distributed and supported elsewhere.

The inspiration is this:

http://2.bp.blogspot.com/-PLdLsEg_p...+kvadrat+-+Attefallshus+-+2+-+1+-+fasad+1.jpg

http://2.bp.blogspot.com/-_WsuZZW2l...adrat+-+Attefallshus+-+2+-+4+-+Interiör+1.jpg

http://4.bp.blogspot.com/-N1nM4jRYf...adrat+-+Attefallshus+-+2+-+5+-+Interiör+2.jpg

But these models do not show how the truss solution would work theoretically..

 

[viltfjall]

My guess is that this is one of the Attefallshus that "stands directly on the ground" so that it works with 4 m. And it's probably not insulated at all... If I'm wrong, I would love to see a construction drawing that I believe you can "buy" from some of those proposals.

 

[Kallebo]

Here is a guy who built a cabin on wheels with a mansard roof in the way you describe:
http://norrvaggen.blogspot.se/

Here are pictures of the roof truss itself: http://norrvaggen.blogspot.se/2013/05/takstolar-till-huset-pa-hjul.html