Calculating Multi-surface walls

[Anonymous]

Hi All,
first I would like to complement Eric Wilk from FC-CADlink on his
most helpful book "ARCHICAD - From CAD to quantity survey".
If any of you are still baffled by the "Calculate Menu (now hidden...)" -
This is a real Eye-Opener!!!

Now to the trick question (see attached image):

A. In a simple wall, I calculate the plaster finish area by using the
"Surface A" reference Quantity.

B. However, in a situation like a Tiled Bathroom Wall, the surface is
covered by TWO different Materials:
- The Tiles themselves, to the hight of 1.8m, which I calculate as
"Length" X 1.8
- The remaining Plaster above the Tiles

The Plaster surface is a "Left-Over" quantity (The tiles have a
"fixed height" of 180cm, The wall hight, however, can change from
situation to situation), and by reason, should be derived by calculating
a subtraction:

Total of "Surface A" - Area of Tiles = Plaster.

In my database, I set up a Tile component which has a ratio of 1.8
to the length of a wall, and a Plaster component with a ratio of 1 to
"Surface A".

The question is this:
How can one create a "Property Object" (that can link to such walls)
in which both components are "read" from the database and then
have a GDL script within the Property Object subtract "Tiles" from
"Plaster"?

My GDL is a bit rusty, but I am sure it can be done via the Properties
script and a database lookup (I Better get that new book by CADImage!)

Ideas?

PS: The issue is calculating the quantities per a SINGLE wall, so
using an extra "tile" object or wall is not the solution.

Thanks -

Gil Rosenthal

[Barry Kelly]

Gil wrote:

Q: Which part of the GDL object do you use to input the script?
I tried various places (Master Script, Property Script...), but
non returned the result needed.
Do you set up specific parameters ("plaster area") in the parameters
screen?

Create a separate property script object for the walls.
I do all of the calculating and outputing from the Property Script of that property object.

These can be linked "individually" to the walls in the wall settings or I have linked them to all walls in the "List Scheme setup".
If you use the list scheme then make sure you tick the box in the walls setting (Listing & Labelling) to "Link Properties by Criteria".

Barry.

[Barry Kelly]

The other image.
Barry.