Mäster said:
How the hell do you draw on the computer? Perspective too...

Don't need an answer to that question, it goes over my head anyway......
Sketchup! Free simpler version of CAD. http://sketchup.google.com/training/videos/new_to_gsu.html for some video examples. Really fast once you've learned it.
 
Thank you, it will be a bookmark for when the mood strikes..
 
Mm. I'm a computer scientist but I gave up after half an hour. There's a high barrier to getting anywhere with CAD programs! If you have to, you probably can, but just making a drawing for fun didn't work for me.
 
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I importensketsig said:
Thank you so much for the help! Invaluable when you're a complete construction beginner. I'll go with one of the following three options, depending on whether I find a good piece of lumber in the pile or not. I probably want to move forward around Christmas Day and no hardware store is likely to be open.

Option 1: screw an extra piece of sparse panel from above on the wall, one piece per actual sparse panel length

Option 2: like 1, but secured primarily through additional sparse panel directly in the roof truss only. Less dependent on good attachment down to the wall.

Option 3: As suggested, a horizontal beam of more substantial dimensions.

Only option 3 provides really good grip for screws or nails from underneath.
Old thread but have the exact same question and haven't found other info.

Isn't option 3 enough and just laying a sparse piece along the whole gable? Where half the width of 70mm hangs out, that's enough to support if you drive the nail slightly angled as well? I nail with a 90mm nail gun.

Doesn't have to be so damn thick, so you don't have to cut out for the insulation on top afterward. Or should one cut out the insulation on top even with a 28x70…?
 
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É ÉlPon said:
Old thread but I have the exact same question and haven't found any other info.

Isn't option 3 enough and just laying a sparse beam along the entire gable? With half the width of 70mm hanging out, that's enough to support if you drive the nails a bit diagonally, right? I'm nailing with a 90mm nail gun.

It doesn't need to be so damn thick, so you don't have to carve out for the insulation on top later. Or should you carve out the insulation on top even with a 28x70…?
No one seemed to know this. But I figured it out myself when I started drawing a bit that the "cap rail" I described (same as option 3) isn't needed; the sparse beam is supported by the horizontal installation layer (red in the image) that comes in the next step.

Drawing of a construction framework with green background, showing horizontal and vertical beams, red installation elements, and no overlying beam.
 
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