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Thread: Google Sketchup

  1. #1
    Mrprez's Avatar
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    Google Sketchup

    I was playing around with Google Sketchup and did this 12 x 10 tarp design. It has no center ridgeline and only uses 7 yards of fabric rather than 8. The seams are 2.5' off the center line of the tarp.

    Still learning about Sketchup, but it is a pretty nice 3D drawing program. Hard to read some of the dimension figures. The cat cuts are 5".
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    Last edited by Mrprez; 12-02-2009 at 11:45.

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    Old Gorge Rat Hawk-eye's Avatar
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    Ya did pretty good Prez! I've not had much chance to play with that program but I've heard good things about it.

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    Mrprez's Avatar
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    Thanks, this was the 2nd iteration. After I screwed up the first one I realized that it would be easier to start with a 12 x 10 square and add the cuts. Made it so much easier and accurate. Lots of nice features in that program.

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    sclittlefield's Avatar
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    Pretty cool idea. I've done something similar for a customer - but it was rectangle.

    You could make the same tarp with a ridgeline seam using 5' outside edges instead of 6' with the same 7 yards.

    Doing it this way does make seam sealing not as crucial though. Clever idea, and good work with SketchUp. That's what I use most of the time.
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    Mrprez's Avatar
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    Yes, you sure could. Might save a bit on the weight, but I wonder how the extra angle would affect the coverage. Here is a smaller tarp that I made using the same technique. I never did finish this one...I think this one only used 4 yards of material.
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    Senior Member DougTheElder's Avatar
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    Is the ridge on a tarp with no sewn seam stronger, or less strong, than the ridge on a tarp with a sewn seam?
    Sometimes even a Blind Hog finds an Acorn

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    Mrprez's Avatar
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    Quote Originally Posted by DougTheElder View Post
    Is the ridge on a tarp with no sewn seam stronger, or less strong, than the ridge on a tarp with a sewn seam?
    A. I'm no engineer, but I did ride a train at DisneyWorld once.

    B. The sewn ridgeline might be a bit sturdier due to the extra layers of fabric and thread in the seam but is prone to leakage and weakness due to poor sewing or broken threads over time. The non-sewn one would have similar problems but only at the ends of the ridgeline where the tieouts are sewn.

    There may be other considerations as well. Refer back to A.!

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    Senior Member DougTheElder's Avatar
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    Quote Originally Posted by Mrprez View Post
    The sewn ridgeline is prone to leakage and weakness due to poor sewing .
    Hush yo' mouth!!!! I'm getting back on the train...
    Sometimes even a Blind Hog finds an Acorn

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    Mrprez's Avatar
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    Quote Originally Posted by DougTheElder View Post
    Hush yo' mouth!!!! I'm getting back on the train...
    I speak from experience on this one. Sipsey #2 last year!

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    I had never thought of using scetch up for this. I had messed with blender (free 3d rendering software) to do a tarp or two but they were way more basic, I just wanted to see what would happen if I added tie outs to certain points on my hennessy hex tarp.

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