Use the Family Types dialog to define the base attributes (parameters) of the rebar coupler family. The parameters become the default settings in the rebar coupler types when placed in a project.
 Properties panel
Properties panel
 (Family Types).
 (Family Types). 
  The following table describes the editable properties of the rebar coupler Family types dialog:
| Parameter | Description | 
|---|---|
| Construction | |
| End Treatment 1 | Specifies the end treatment type at the primary end of the coupler. See About Reinforcement End Treatments. | 
| End Treatment 2 | Specifies the end treatment type at the secondary end of the coupler. See About Reinforcement End Treatments. | 
| Bar Size 1 | Specifies the rebar diameter for the primary end of the coupler family. | 
| Bar Size 2 | Specifies the rebar diameter for the secondary end of the coupler family. | 
| Materials and Finishes | |
| Material | Specifies the material to use with the coupler family. | 
| Dimensions | |
| External Diameter | Specifies the diameter of the coupler at its outermost surface. | 
| Symbol Width | Specifies the width of the symbolic representation of the coupler in plan views. | 
| Symbol Length | Specifies the length of the symbolic representation of the coupler in plan views. | 
| Total Length | Specifies the length of the coupler. | 
| Bar Engagement 1 | Specifies the minimum thread engagement for the primary end of the coupler. | 
| Bar Engagement 2 | Specifies the minimum thread engagement for the secondary end of the coupler. | 
| Identity Data | |
| Part Number | Displays codes or manufacturer product codes for the coupler. | 
| Type Image | Displays a user-defined image file that represents the coupler. See About Managing Images. | 
| Keynote | The keynote text. | 
| Model | The manufacturer internal number. | 
| Manufacturer | The coupler manufacturer. | 
| Type Comments | General comments about the coupler family. You can include this information in a schedule. | 
| URL | Specifies a link to a web page that contains type-specific information. Click the icon to establish a link. | 
| Description | An optional description of the coupler family. | 
| Assembly Code | Specifies the assembly code. | 
| Cost | The user-defined cost of the coupler. |