In this article I will be focusing on a simple example to demonstrate RH-GH-AC live connection, another wonderful OPEN BIM workflow from GRAPHISOFT. We will start with an input from a ARCHICAD (AC) file and based on that input a set of balconies will be created using Grasshopper (GH) which is running on top of Rhino (RH). There is not much use of RH but we need Rhino to run Grasshopper.
Make sure all the three applications (AC, RH and GH) were installed along with live connection add-on from GRAPHISOFT running.
Refer to Grasshopper ARCHICAD Live Connection 1.5 User Guide from the following link:
Chapters to focus:
- Getting Started
- Launch the Applications
- Start the Connection
- Grasshopper Palette in ARCHICAD
To understand this exercise there is a need for basic understanding of Grasshopper. Please refer to the following links:
Input from AC
- In ARCHICAD create a simple building with 10 Story + Roof. Set the Story to Story height as 3000 mm. Create a Complex Profile for the railing as well. Alternatively download the file from the link here.
- Use Line tool to draw a line from point P1 to P2, suggest to draw the line in 2nd Storey.
- Select the line just drawn using the Arrow tool.
This post is a follow-up of previous post Project Base Files for Coordination. In case the Structural team decided to use Tekla Structures for their BIM authoring then they need a Project Base File in Tekla with setup based on Architectural file.
Architectural Project Base File
Setup the Architectural Project Base File in ARCHICAD and export as IFC file as discussed in the post Project Base Files for Coordination.
This post is to follow up on a request for explanation of each step on the post Project Base Files for Coordination. Let me write this post to further explain the steps.
Why there is a need for Project Base Files?
As mentioned in the post Project Base Files (PBF) are project specific templates in various tools used for BIM authoring.
- PBF consists of Location, Orientation, Grids and Levels. These information can be based on national standards or agreed settings by the entire project team through BIM Execution Plan (BEP).
- This is to make sure everyone (BIM Authors) start with the right foot.
- This will ease the co-ordination process when the models from different BIM authors (disciplines or trades) are merged together.
- This is to represent the real world condition of the entire building (including all disciplines) virtually.
It is a requirement in Singapore to produce and submit color coded floor plans with tabulation of walls that shows legends, buildability types (BType), lengths, labor saving index (LSIndex) and buildability score (BScore). As we are doing it in BIM we can add part 3D models showing the floor as well. As part of ARCHICAD’s OPEN BIM approach the team have developed a very good inter-operable solution with Excel. Let us see how to do this with ARCHICAD + Excel.
Prepare the AutoCAD file
Open Surveyor’s dwg file and check whether it is done as per local practice/standards, for example:
- Units = Meters
- Block or Point is used to represent each survey point and placed at a correct global coordinate (X,Y,Z) – Use LIST command and pick the element to check
Now we are ready to Extract Data from the survey points.
SIACAD eBDAS is an add-on module for computing Buildability Scores (BScore). The requirement is specific for Singapore projects, with the recent emphasis on BIM, SIACAD have developed the eBDAS BIM as an “Add-In” for Revit / ArchiCAD (IFC).
To read more about eBDAS, please visit SIACAD website at http://siacad.weebly.com/ebdas-bim.html.
This post will show how to set up the IFC translators for your ARCHICAD project before exporting it for eBDAS BScore computation.