Geometry Gym
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    • Example Files
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      • Automating Structural Analysis and Design with SPACEGASS
      • Integrating Karamba3d with Geometry Gym
      • Quick Start Guide - Parametric Structural Analysis (SAP2000)
      • IFC to Structural Analysis
      • Intro to Rhino.Inside Revit
    • "How-to" Guides
      • Structural Analysis HTGs
        • Convert a Structural Analysis Model through IFC
        • Transfer IFC to Structural Analysis
      • BIM How to Guides
        • Weekly Batch Convert
  • Rhino-Grasshopper
    • Introduction
      • Interface Set-up
      • Model Set-up
    • BullAnt
      • Introduction
      • Structure
        • Profiles
      • Geometry Creation Tools
        • Geometric Pattern Tools
        • Model Structure
      • Form Finding
      • Geometry Utilities
      • List and Tree Utilities
      • BullAnt Examples
    • Structural Analysis
      • Introduction
      • Structural Analysis plug-in General
        • Tools for Rhino
          • Import/Export Tools
          • Conversion Tools
          • General Tools
        • GH User Interface
        • Structural Model
          • Structural Model Basics
          • Bake Model (Export)
          • Import Structural Analysis Model
          • Convert Model
            • Structural Analysis Detection from BIM
        • Model Attributes
        • Materials
        • Section Properties
        • Elements
          • Nodes
          • 1D Elements (Curve)
          • 2D Elements (Area)
          • 3D Elements (Solid)
          • Groups/Lists
        • Loads
          • Loadings
          • Load Cases
          • Load Combinations
        • Automating Analysis and Result Queries
          • Solver
          • Analysis Result Queries
          • Query Existing Analysis Model
        • Design
      • GSA | ggRhinoGSA
        • GSA Specifics
        • GSA Examples
      • Etabs | ggRhinoEtabs
        • Etabs Specifics
        • Etabs Examples
      • LUSAS | ggRhinoLUSAS
        • LUSAS Specifics
        • LUSAS Examples
      • ROBOT | ggRhinoRobot
        • Robot Specifics
        • Robot Examples
      • SAP2000 | ggRhinoSAP
        • SAP2000 Specifics
        • SAP2000 Examples
      • SPACE GASS | ggRhinoSpaceGass
        • SPACE GASS Specifics
        • SPACE GASS Examples
      • Strand7 | ggRhinoStrand7
        • Strand 7 Specfics
        • Strand7 Examples
      • Karamba3d
        • Karamba3d Examples
      • Create with Code
    • IFC | ggRhinoIFC
      • Introduction
        • Exporting IFC from External App
      • IFC for Rhino
        • Rhino IFC Import
        • Rhino IFC Export
          • Using Rhino IFC Layers
          • Rhino to IFC Example
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          • Model Definition
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            • Infrastructure Elements
        • Working with IFC
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          • Extract
          • Quantities
          • Assign Relationships
          • Assign Resources
          • Element Placement and Mapping
          • Element Assemblies
        • Create via Code
      • IFC Examples
    • Revit | ggRhinoIFC
      • Introduction
      • Working with ggRVT
        • Import/Export
        • Elements
          • Element Types and Instances
          • Placement
          • Attributes
        • Model Definition
        • Materials and Profiles
        • Families
        • Analytical
        • Documentation
      • Rhino Inside Revit
      • Revit Examples
    • Tekla | ggRhinoTekla
      • Introduction
      • Tekla Examples
  • Revit
    • Introduction
    • RevitIFC
      • IFC Import
        • IFC Import Options
        • IFC Category Mapping
      • IFC Export
        • IFC Enhanced Export
        • IFC Enhanced Export Linked Models
        • IFC Revision Export
      • IFC Tools for Revit
      • IFC Tools
    • Revit to Structural Analysis
  • OTHER
    • Navisworks | ggNavisIFC
      • Import 4D Information to Navisworks
      • Navisworks IFC Export
    • Advance Steel | ggAdvanceSteelIFC
    • Excel | ggExcelIFC
    • IFC Tree Viewer
  • Need Help?
    • FAQs
    • Ask on the Forum
    • Abbreviations
    • Contributors
  • Changelog
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On this page
  • Units
  • Measure Units
  • Load Units
  • Global Axis Systems and Model Positioning
  • Local Axis Systems
  • Levels and Grids

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  1. Rhino-Grasshopper
  2. Structural Analysis
  3. Structural Analysis plug-in General

Model Attributes

Setting model attributes

PreviousStructural Analysis Detection from BIMNextMaterials

Last updated 2 years ago

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Units

Geometry gym allows several ways in which to use user preferred units and works with either Imperial or Metric units. For structural analysis, there are two scaling factors which are applied when exporting, one for the measure or length units and one for loading units. This allow you to work in any unit system you desire.

In order to allow this typically a two fold scaling occurs, one at input and one at export. The one at input converts your working units back to the units that geometry gym uses in the background (SI) and the one at export converting into desired analysis units.

When exporting (baking) into an analysis software package, units can be converted again into the desired units of that package. These settings are generally defined by right clicking on the bake component of each analysis plug-in as shown below.

If there is no options then standard units of each program are generally used. You should contact support for further information or requests.

Measure Units

For measure units, Geometry Gym will automatically detect which units you are using in your rhino file and apply the scaling factor as required. Note: that you will need to be consistent with what units you are using within each script.

I.e. If you are working in meters in Rhino, every input should be in meters in Grasshopper, including inputs for profiles and the like.

Load Units

For load units, a specific reference cannot be made from Rhino. Therefore, a units input is specified on most of the load components. This again provides the ability to use any type of input loading units. The image below explains the basic concept.

Global Axis Systems and Model Positioning

Typically structural analysis software run on a simple co-ordinates system. It is rare that a structural analysis program will allow the input of a shared co-ordinates provide a model positioning system.

If importing a model from an external BIM software application it is sometimes recommended that a model be transposed into a more preferable position for modelling and axis alignment close to the origin.

If you are having trouble with model positioning please contact us to assist.

Local Axis Systems

Some analysis packages allow you to provide local axis systems for the definition of nodes and members.

This can be helpful for geometrically complex arrangements.

Levels and Grids

A lot of structural analysis programs allow for the definition of levels and or grids.

Setting preferred export units
Setting Load Units