topic Re: SLAB INFO in Libraries & objects

SLAB INFO

Anonymous — Sat, 01 Jan 2011 11:21:48 GMT

Best wishes for 2011 to everyone !

I'm making a GDL object of a (concrete or steel) beam.
(using ArchiCAD for structural engineering drawing)

Can a GDL object know information about the (nearest) slab on top of which it is positioned, in the same story ?
(distance to the slab, thickness of the slab)

I found the global parameters about home/current story elevation but that's not what I need.

Re: SLAB INFO

Jochen Suehlo — Sat, 01 Jan 2011 20:57:27 GMT

If the object is a label, yes; and if it is assosiated with the slab.
Globals: SLAB_THICKNESS and GLOB_HSTORY_ELEV + GLOB_ELEVATION.

If it is no label, i think not.

Re: SLAB INFO

vfrontiers — Sun, 02 Jan 2011 04:53:00 GMT

I would like to know WHY you're asking....

If it is so you can show that data in a schedule, might be tricky...

If you want to always place your beam a specific height above the slab, that might be a bit easier...

1. Include a parameter that specifies how high above the slab you want to place it.. And use that parameter as a "z" offset in your 3d script

2. Use the GRAVITY to lock to top of slab

3. Place your object... The objects base elevation will read the same as the slab, but your parameter that defines the offset will let the beam beam hover that distance above the slab....

Let me know if I didn't make sense...

Re: SLAB INFO

Ralph Wessel — Sun, 02 Jan 2011 16:22:44 GMT

sadones1 wrote:
Can a GDL object know information about the (nearest) slab on top of which it is positioned, in the same story ?
(distance to the slab, thickness of the slab)

Only possible using the ArchiCAD API.

Re: SLAB INFO

Anonymous — Sun, 02 Jan 2011 18:34:01 GMT

vfrontiers wrote:
2. Use the GRAVITY to lock to top of slab

Unless something has changed the gravity function will only drop things onto slabs, roofs and meshes but does not maintain the relationship after the initial placement.

Re: SLAB INFO

vfrontiers — Sun, 02 Jan 2011 23:25:37 GMT

Matthew wrote:
vfrontiers wrote:
2. Use the GRAVITY to lock to top of slab
Unless something has changed the gravity function will only drop things onto slabs, roofs and meshes but does not maintain the relationship after the initial placement.

Right... I was only suggesting that at PLACEMENT it would know the top of slab and could "hover" above it...

Re: SLAB INFO

Anonymous — Mon, 03 Jan 2011 02:03:38 GMT

vfrontiers wrote:
Matthew wrote:
vfrontiers wrote:
2. Use the GRAVITY to lock to top of slab
Unless something has changed the gravity function will only drop things onto slabs, roofs and meshes but does not maintain the relationship after the initial placement.
Right... I was only suggesting that at PLACEMENT it would know the top of slab and could "hover" above it...

I figured you knew. I just had to comment, partly because I WISH we could lock in the relationship.

Re: SLAB INFO

Anonymous — Mon, 03 Jan 2011 05:15:54 GMT

I need the following kind of section (see attachment).
The beam is a GDL object.
The section is generated as a 2D script.
If GLOB_SCALE = 50, the 2D script generates the plan view of the beam, without steel.

I now enter the slab (bottom) level, slab thickness in SCHEDULES and I also draw the slab with the normal archicad SLAB tool, so I enter the same information twice.

Re: SLAB INFO

Anonymous — Mon, 03 Jan 2011 05:21:45 GMT

For different interactions between beam and slab, the drawing must adapt, that's why I draw the section with a 2D script at this moment.

Re: SLAB INFO

Anonymous — Mon, 03 Jan 2011 08:35:10 GMT

To Duane,

Your suggestion to place the object at some distance above the top level of the current floor works as suggested.

But the question is :
Can a GDL object access information about slabs on the current story (or the story 1 level higher) to use in a 2D script ?

I'm afraid it's not possible without API ?