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Birdman
Guest
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 Posted:
Fri Nov 19, 2004 4:53 pm Post subject:
Developed Moulding |
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For all the architectural types here:
Cornice mldg. runs along an eave, turns 90%%d, and angles up the gable rake. This requires two
different profiles to miter together correctly.
My question: How do you generate the rake profile from the cornice profile, given the roof pitch.
The old school way...ie board techniques. I need this to be and instructional tool for 2d CAD
draftsmen. Web searches have turned up zip, zero, and nada.
TIA for the input.
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Nick IV 7
Guest
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| Posted:
Sat Nov 20, 2004 10:22 pm Post subject:
Re: Developed Moulding |
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"Birdman" <address@noneofyour.biz> wrote in message
news:419ddeaf$1_1@newsprd01...
| Quote: | For all the architectural types here:
Cornice mldg. runs along an eave, turns 90%%d, and angles up the gable
rake. This requires two different profiles to miter together correctly.
My question: How do you generate the rake profile from the cornice
profile, given the roof pitch.
The old school way...ie board techniques. I need this to be and
instructional tool for 2d CAD draftsmen.
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Post up a 2D and I'll look at it, I still teach OLD school drawing.
Nick |
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Nick IV 7
Guest
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| Posted:
Mon Nov 22, 2004 10:49 pm Post subject:
Re: Developed Moulding |
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"Birdman" <address@noneofyour.biz> wrote in message
news:41a1e59b$1_2@newsprd01...
| Quote: | Thanks Nick.
Here's what seems to be the correct procedure, although I am unsure how to
get the angle of cut from
the roof pitch, if this is even correct.
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I'm unsure what the drawing layout is. If you gave me an orthographic
view(s) of the
profile I would extrude it along the 30degs path and get the dimensions for
you.
The path for the extrude would be along the lines then turn thru the 30degs
corner then down.
So I need the profile then the path.
Does that make sense ?
Nick
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Nick IV 7
Guest
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| Posted:
Mon Nov 22, 2004 10:50 pm Post subject:
Re: Developed Moulding |
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PS A photo of a similar moulding installed on an actual roof
would help me understand it.
Nick |
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Birdman
Guest
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| Posted:
Tue Nov 23, 2004 12:45 am Post subject:
Re: Developed Moulding |
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Nick;
I'll get back to ya.
I'm shootin' blanks on it at the moment and am temporarily swamped.
Monday, ya know.... :(
Nick IV 7 wrote:
| Quote: | PS A photo of a similar moulding installed on an actual roof
would help me understand it.
Nick
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teiarch
Guest
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| Posted:
Tue Nov 23, 2004 11:53 pm Post subject:
Re: Developed Moulding |
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Make you cornice molding (or moulding, if you prefer) into a 3D solid first.
To properly display a cornice molding, you should approach it the same way as if your were installing the real thing.
Extruding along a path might work if the path is a 3D polyline. Otherwise, the old fashioned way will work.
Place your moulding solid along the eave side leaving enough past the end (corner) to miter.
Place another molding solid at 90 degrees and aloign with the first one with an overlap past the corner.
Slice the two solids to create a miter at the corner. Throw away the trimmed off pieces.
(The above two steps could also be done by extruding the cornice profile along a polyline path which turns the corner.)
Place a third molding soild aligned with the gable end roof pitch overlapping the turned corner molding.
Slice the angled and turned corner solids. Throw away the trimmed pieces.
Do the same thing at the peak goinf down the other slope side of the roof.
Once you get the shapes you want in the positions you want, you can copy to other locations where they will fit OR: make them into a block and insert them. (Recommended)
Message was edited by: teiarch |
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Peter Kastmiler
Guest
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Sun Dec 12, 2004 8:05 am Post subject:
Re: Developed Moulding |
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I just ran into this in an old carpentry textbook from the early 1920's. If you are still interested I will send you the answer to your problem. It is a geometric problem, when you see it layed out the way old craftsman layed it out you will see the common sense behind the whole thing.
PeterK
Kastmiler@sbcglobal.net |
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Birdman
Guest
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| Posted:
Wed Dec 15, 2004 11:14 pm Post subject:
Re: Developed Moulding |
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Thanks Peter.
I just sent you an email.
Peter Kastmiler wrote:
| Quote: | I just ran into this in an old carpentry textbook from the early 1920's. If you are still interested I will send you the answer to your problem. It is a geometric problem, when you see it layed out the way old craftsman layed it out you will see the common sense behind the whole thing.
PeterK
Kastmiler@sbcglobal.net |
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