topic How to model a.... in Modeling

How to model a....

Arcadia — Tue, 23 May 2023 12:46:43 GMT

... bullnose verandah. Not sure if this is just an Aus term but it is essentially a verandah made with curved steel roofing sheets. It is easy enough to model this with a complex profile then put a vectorial hatch on it to represent the ribs of the sheeting but being a pedantic bugger I want something more detailed. I use the cadimage roof coverings which actually show the ribs of the sheets accurately. Is there any way to extrude some sort of corrugated profile of a single roof sheet (easy enough if it was straight with complex profile) but have the extrusion curved to the shape I want. I hope I have explained things properly.

Re: How to model a....

David Maudlin — Thu, 27 Oct 2011 13:46:16 GMT

Arcadia:

For those of us not familiar with the term, an illustration would really help.

David

Re: How to model a....

Arcadia — Thu, 27 Oct 2011 18:19:42 GMT

David wrote:
Arcadia:

For those of us not familiar with the term, an illustration would really help.

David

Yes I should have done this first. See attached pic. Essentially what I want to do is instead of extruding a simple profile horizontally for the length of the verandah that would not include the sheet ribs I want to extrude a complex profile of an individual sheet (the complex profile being the corrugated shape) into the curved shape. Maybe this is possible with the shell tool? I have not used the shell tool yet.

Rod Jurich

Rod Jurich — Fri, 28 Oct 2011 03:07:23 GMT

Arcadia wrote:
... bullnose verandah./......

Arcadia, you might want to look at this link for 4D Library parts

Re: How to model a....

Arcadia — Fri, 28 Oct 2011 03:20:51 GMT

Yeah I already have that part. I actually have my own complex profiles made up though that do a better job. I was trying to achieve a more detailed profile of the sheet as a bit of a design exercise to see how it worked and to get something that matches the 'detailed 3D' setting of the cadimage roof covering.

Re: How to model a....

Erwin Edel — Fri, 28 Oct 2011 09:57:10 GMT

We've got corrugate metal objects in our ArchiCAD library in NL, they look like they are part of the international library (I can't verify this, as I think we've not been getting the international library shipped with ArchiCAD since 14). Maybe you can clad with them. Possibly a PITA, but it should do the trick. You'll be doing a lot of SEO.

You can do this with shell tool (revolved extrusion), but I tried something similar the other day (copper ridge cover for a thatched roof) and found that it slowed down my drawing a lot (all the nodes). More so than an object with 2d symbol.

Another option would be to model the top layer of your roof a little thicker and SEO a lot of little sheets out of the roof to create the profile.

Personally I would go with a vectorial hatch and call it a day for such a fine detailed extrusion. Sometimes for standing seam systems I model the seams, but as said that's generally a pain in the ... to modify.

Re: How to model a....

Arcadia — Fri, 28 Oct 2011 18:19:46 GMT

It seems like it is not worth the hassle if there is no simple way to do it. I've just done my current job the conventional way with a complex profile and vectorial hatch.

Re: How to model a....

Ralph Wessel — Sat, 29 Oct 2011 12:09:07 GMT

Arcadia wrote:
It seems like it is not worth the hassle if there is no simple way to do it. I've just done my current job the conventional way with a complex profile and vectorial hatch.

This is easy with OBJECTiVE (freely editable afterward too). Referring to the attached image:

1. Draw the roofing profile with the fill tool
2. Select the fill and click the menu OBJECTiVE > Component > New Profile. Make a new section profile, and select the preferred name, library, and default length
3. You can draw the profile directly into a section, overlaying the rest of the model. Because we'll be looking at the profile side-on, it's swivelled around 90 degrees.
4. Set the placement method by angle and length, and place the profile across the bullnose section.
5. Use the Bend tool to shape it to the curve (OBJECTiVE > Tools Bend).
6. In the profile settings, set the end extension to the span of the roof
7. In plan, use the Split tool to cut the roof sheets to the corner (OBJECTiVE > Tools > Split)
8. The finished plan
9. The finished model

Re: How to model a....

Arcadia — Sat, 29 Oct 2011 19:16:57 GMT

This is an outstanding looking tool! Its disappointing Graphisoft doesn't build this sort of functionality into Archicad from the start. I'm not sure if its worth the cost of the tool just for this one purpose of creating bullnose sheets but I'll think about other uses for it and I may well give it a go. Thanks.

Re: How to model a....

Anonymous — Sat, 29 Oct 2011 21:31:43 GMT

One really nice thing about Objective is that the update to the next version is free and you don't have to pay to upgrade when you upgrade AC.

Re: How to model a....

Gerald Hoffman — Wed, 02 Nov 2011 01:18:21 GMT

It may not be worth it for this one project but I use this tool more than any other add-on I have purchased for AC. I use it for almost of my framing including trusses and many other things. Check out the site videos and you will get some idea of what you may use it for. It is just so versatile. You will not be sorry. Cough up the bucks! This is not a paid advertisement.

Cheers,

Rod Jurich

Rod Jurich — Wed, 02 Nov 2011 04:33:15 GMT

Gerald wrote:
/........ You will not be sorry. Cough up the bucks! This is not a paid advertisement.

............ totally agree with Gerald.
Without doubt your best investment, next to AC that you will make.

Re: How to model a....

Arcadia — Wed, 02 Nov 2011 05:25:12 GMT

Well that's pretty good endorsement. I'll definitely have to get it. Thanks guys.

Re: How to model a....

Anonymous — Sun, 30 Dec 2012 02:34:05 GMT

Personally i would model the top layer of your roof a little thicker and SEO a lot of little sheets out of the roof to create the profile then I would go with a vectorial hatch for such a fine detailed extrusion.