topic Re: Altering Roof in Modeling

Altering Roof

Anonymous — Tue, 23 May 2023 13:18:18 GMT

I have constructed a rather complex roof as shown in the picture bellow. I'm happy with its shape, pitches, peaks, etc, except for the plateau on the section roof to the right (the skinny rectangular area). I want to make a catwalk at that location, a little wider then the landing the computer has generated. How do I go about altering the size of that area? Thanks.

Re: Altering Roof

Dwight — Wed, 30 May 2007 02:12:47 GMT

In plan, put a slab at the approximate height and exact size you want - be symmetric.

Pull the roof edges to match the slab edges.

In section or 3D adjust the platform height as required.

Re: Altering Roof

Anonymous — Wed, 30 May 2007 02:51:30 GMT

I click on one of the four corners of the rectangular section of roof I want to change and it only allows me to move the entire roof, not alter the roof lines. Any suggestions?

Re: Altering Roof

Dwight — Wed, 30 May 2007 03:01:39 GMT

You need training.

To edit the roof you must be in the roof tool with the roof selected, otherwise you will drag the entire roof.

When things are set right, you'll get this palette to select the edit type.

Re: Altering Roof

Anonymous — Wed, 30 May 2007 03:14:07 GMT

Dwight wrote:
To edit the roof you must be in the roof tool with the roof selected, otherwise you will drag the entire roof.

I can tell you're an old timer. Used to be that way.
Now you get the pet palette for editing no matter what tool is selected.
Took me a while to get used to it too.
It's still true if you want to just draw a hole in the selected roof (the old fashioned way).

Re: Altering Roof

Dwight — Wed, 30 May 2007 03:21:51 GMT

That's the trouble working from memory. I guess that i am the one who needs the training.

Re: Altering Roof

Anonymous — Wed, 30 May 2007 03:34:01 GMT

I get the lower half of that pallet, but not the upper half with the buttons I need. I select the roof, then select the roof tool and click the point I want to alter, which brings up just the lower half of that pallet.

I'm a newbie to ArchiCAD, recently switched over from AutoCAD on Windows to ArchiCAD on a Mac, so I'm still trying to learn how to do everything I normally do on AutoCAD.

ETA: I selected the "suspend groups" option allowing me to edit the points, however, I'm having a little trouble reconfiguring the lower right side of the section. Is there any easier and more precise way of reconfiguring the roof other then just kind of guessing and checking with the points?

Re: Altering Roof

Anonymous — Wed, 30 May 2007 06:50:06 GMT

camhabib wrote:
ETA: I selected the "suspend groups" option allowing me to edit the points, however, I'm having a little trouble reconfiguring the lower right side of the section. Is there any easier and more precise way of reconfiguring the roof other then just kind of guessing and checking with the points?

So it was grouped? That was going to be my next guess. Hard to answer the rest of your question because I'm not sure exactly what you are trying to do. The general answer is yes there are very quick and precise methods for editing roofs.

An important trick to know is if you select one (and only one) roof, you can command/ctrl click the edge of another roof and it will extend and angle to fit the selected one. Dwight may be right about the training. These basic techniques are a lot easier to show than to describe.

Re: Altering Roof

Richard Swann — Wed, 30 May 2007 16:11:25 GMT

Matthew wrote:
if you select one (and only one) roof, you can command/ctrl click the edge of another

Actually strictly speaking thats not true either (maybe another old timers habit?) you can have both roofs selected and click the edges of each in turn. Makes for a simple way of meeting roofs..

Re: Altering Roof

Anonymous — Wed, 30 May 2007 16:40:47 GMT

All I want to accomplish is expand the smaller red dashed landing to the size of the larger green slab surrounding it. If anyone knows how to do this in the easiest possibly way, preferably some sort of automatic computer generated method maintaining an optimal structural integrity, that would be great. As I said, I am brand new to ArchiCAD, new as in this week, so I'm still really trying to understand the program and how it works. I'd love a suggestion of a book or tutorial that could help teach me some of the basics of the program if anyone could.

Re: Altering Roof

TomWaltz — Wed, 30 May 2007 16:59:01 GMT

I usually recommend the Archicad 10 Step by Step by Tom Simmons, that's about $60.

Re: Altering Roof

Richard Swann — Wed, 30 May 2007 17:06:47 GMT

camhabib wrote:
All I want to accomplish is expand the smaller red dashed landing to the size of the larger green slab surrounding it.

I think Dwight answered already: Select the edges of the roofs and stretch them back till they meet the green rectangle slab. You will need to adjust the height of the slab in section/ 3d to meet the roof edges. A tip for future is that you can use roofs as horizontal surfaces as well as slabs. They can then intelligently find the intersections between roofs as previously described.

Re: Altering Roof

Anonymous — Wed, 30 May 2007 17:34:16 GMT

Richard wrote:
camhabib wrote:
All I want to accomplish is expand the smaller red dashed landing to the size of the larger green slab surrounding it.
I think Dwight answered already: Select the edges of the roofs and stretch them back till they meet the green rectangle slab. You will need to adjust the height of the slab in section/ 3d to meet the roof edges. A tip for future is that you can use roofs as horizontal surfaces as well as slabs. They can then intelligently find the intersections between roofs as previously described.

Dwight and Richard, I attempted to do that but I'm having a few problems. There are quite a few slopes that intersect there on the lower right side, and its somewhat difficult to get them to match up nicely with the increased landing size. The best I can do doesn't look very pretty and leaves a rather nasty gap in the intersection of two slopes. I guess I'll just have to pick up a few guides and see what I can learn on my own.

Re: Altering Roof

Anonymous — Wed, 30 May 2007 19:41:27 GMT

Hi Camhabib,

Your frustrations may not be totally due to the lack of training.

Don't forget when two roofs join that are the same pitch and are at right-angles to each other they will always meet at 45 degrees on plan.

ArchiCAD has worked out that this is the best (the only?) way of joining the roofs together at the same pitch, given the geometry of the walls below.

There are some extra joins in the roof that probably shouldn't be there (circled in red). Check the walls dashed in red on the attached image below to see if they are exactly in line. You may find that they are not.

To be able to adjust the flat area, you need the two roofs hatched (badly ) in green and blue to be single roof planes.

Trying to to increase the size of the flat bit manually without correcting it will be fighting the laws of geometry!

I think once you sort that out you will have no problems.

Hope that helps!

Pete.
(Yes, I know my sketch looks like a three-year-old with hiccups has drawn it. My excuse is I can't draw freehand with a mouse!! )