topic Re: Curve Stramp in Modeling

Curve Stramp

Anonymous — Thu, 30 Jan 2025 11:53:19 GMT

Hi people its me again can anyone show me how to do a Curve Stramp. I can do a curve ramp using mesh tool and i have tried to use stair maker but i can not create a Stramp, somebody has suggested me to use roof tool over a curve stair, i have tried unsucessfully, can anyone show me the CORRECT way to create a Curve Stramp. thanks alot

lovetrain

Re: Curve Stramp

Anonymous — Sat, 08 May 2004 00:13:54 GMT

What is a "stramp"? A stair + ramp? If so how are they combined?

My guess is the best approach is a combination of mesh ramps and slab steps. I am assuming the design consists of short runs (two risers?) of steps with intervening sections of ramps.

Re: Curve Stramp

Anonymous — Sat, 08 May 2004 10:53:42 GMT

Stramp is a strair ramp like the one Steven Holl used in Helsinki, curved stramps. I just dont know how to create one like that using archicad tools.
I have tried unsucessfully.

lovetrain

Re: Curve Stramp

Anonymous — Sat, 08 May 2004 19:55:42 GMT

i'm assuming you mean that each tread is ramped, followed by a riser

draw the first tread wirth arcs and lines

magic wand a mesh into this

elevate the 'top' end of your tread with the pet pallette

multiply, rotate and elevate

if you need a nice smooth underside to your stramp, create a similar thang underneath (riser=elevate) and SEO that from the stramp

hope that makes sense, if not happy to elucidate

Re: Curve Stramp

Anonymous — Sat, 08 May 2004 20:26:31 GMT

It occurs to me that this "stepped ramp" could
easily be made with roofs and the under side
smoothed out with one roof that is SEO subtracted
from the other roofs.
Peter Devlin

Re: Curve Stramp

Anonymous — Sat, 08 May 2004 20:50:24 GMT

I need to amend what I said by saying that the roof method
only works with strait stepped ramps.
With curved stepped ramps you must use
the method suggested by Bill Shorten.
Peter Devlin

Re: Curve Stramp

Anonymous — Sun, 09 May 2004 02:38:00 GMT

Hi Bill Shorten, take a look at the photo, did i do the correct way that you show me? cuz when i elevate the top of the Stramp, it also increased the thickness of that end, which i does not want or did i do it wrong?

lovetrain

Re: Curve Stramp

Anonymous — Sun, 09 May 2004 04:52:32 GMT

Use the Mesh to Roof tool.

Re: Curve Stramp

Anonymous — Sun, 09 May 2004 17:54:44 GMT

Hi Mark Flamer

Can u be more specific about the Mesh to Roof tools? cuz i did not quite get it. Thanks

lovetrain

Re: Curve Stramp

Anonymous — Mon, 10 May 2004 04:39:57 GMT

Draw 2 circles or arcs representing the inner and outer radiuses of your ramp. Divide the circles radialy from the center of the 2 arcs like pieces of pie. Do this in increments of degrees based on the total degrees of the arcs ( If your ramp is a 180 degree arc use 20 degrees or something like that). Magic wand a mesh into the space between the 2 arcs and your radial lines that represents the bottom of your ramp. Set the elevation of the 2 nodes that are the starting edge of your ramp to 0 and the 2 nodes on the uphill side of your ramp to an elevation based on the total rise of your ramp divided by the number of segments you split the arcs into. Select the mesh and use the Mesh to Roof tool to convert the mesh into a grouped cluster of roofs with the appropiate fill and thickness. Select the roof and use the Multiply-Rotate command. In the Multiply settings set the method to rotate & spread. Set the degrees to the same number as the lines dividing the arcs and the elevate setting to the same elevation as you set the uphill side of the original mesh to. Multiply around the center of the arcs. Select all the roofs and group. Switch to the 3D window and there it is! Hope this makes sense.

Re: Curve Stramp

Anonymous — Mon, 10 May 2004 20:19:32 GMT

mark's method is better. mine used another object under each stread, subtracted, to get the curve of the underside

however you do it, one suggestion, if you need to edit the stramp, start again from scratch. it'll be much quicker

ponders for a moment

using mark's method, the u/s of the stramp will step (which could be what you want, i've never designed a stramp). with the mesh (and SEO) you can get a smooth u/s

bill

Re: Curve Stramp

Anonymous — Mon, 10 May 2004 23:59:43 GMT

As long as you use the Mesh to Roof tool there should be no steps on the underside of the "Stramp". It will be smooth! Cool, I posted my first useful tip! Definately in-debt to the forum.

Re: Curve Stramp

Anonymous — Wed, 12 May 2004 21:37:11 GMT

mark

no, you won't get steps under each individual section (which i hereby pronounce shall be hereafter called a strampette) of the stramp , but, using the mesh to roof tool, surely you end up with a step on the u/s between each strampette.

since each strampette/roof can only have a constant thickness?

happy to be proved wrong on this

bill

with you absolutely on the utility of this forum thing. learnt more, much more, here, than anywhere else

Re: Curve Stramp

Anonymous — Thu, 13 May 2004 01:26:57 GMT

For those interested in curved ramps, stramps, and trimming curved walls to have a sloped top, and for other uses,
I made a modest little object that makes a ramp or a strampette
both with smooth undersides.
I did this initially because the "curved ramp object" in the
standard library both in AC 6.5, AC 7 and AC 8 is made with
the RULED command which is only a surface not solid and
I'm guessing is the reason it won't work with SEO.
Zero thickness doesn't work with SEO.
This object is made with the bPRISM_ command and is solid
and therefore works with SEO and gets around all this work involving,
meshes, mesh to roof, and SEO to get a smooth underside.

If anyone is interested, e-mail me and you are welcome to it.
Peter Devlin
cdev@adelphia.net

Re: Curve Stramp

Anonymous — Thu, 13 May 2004 02:32:29 GMT

The RULED command still produces a surface model? Too bad.

All the other previously surface forms in GDL (that I've checked) are now producing true solids.

Re: Curve Stramp

Anonymous — Thu, 13 May 2004 03:45:23 GMT

Matthew,
Is this true of the SWEEP command?
I looked in the newest GDL manual and it says
that SWEEP is a surface. But if your right
that it displays as solid this is good news.
What other previously surface forms in GDL
are now solids?
Peter Devlin

Re: Curve Stramp

Laszlo Nagy — Thu, 13 May 2004 10:02:57 GMT

I think you can just cut the given object with a Section and see if it displays a section Fill. If it does, it is solid.
That of course means I don't have the exact answer to your question, I would have to try it myself.
Laszlo

Re: Curve Stramp

Anonymous — Thu, 13 May 2004 10:33:21 GMT

Laszlo is right. You have to test them in 3D. The manual still lists the forms as surfaces even though they have since been changed to solids.

I haven't tried them all, so I don't which ones might still be surface models. I discovered this when I wanted to use the TUBE to make an element to use as an operator in SEOs.

Re: Curve Stramp

Laszlo Nagy — Fri, 14 May 2004 08:46:13 GMT

As a rule of thumb that might be true:
Those GDL commands that create bodies are solid.
Those GDL commands that create surfaces are not (e.g. COONS).
But in case of the earlier, it is also important what you set with the MODEL command.
MODEL SURFACE or
MODEL SOLID.
Check that in the ArchiCAD Help. It has a picture of it.
Laszlo