Add/Modify Elements

Add/Modify Elements – features for adding/modifying additional joists, support joists, bridging/nogging elements, etc.

Add Additional Joist

Add Additional Joist – adds additional joist into selected frame with predefined settings. 

Additional Joist sizes

Type – select the family and type that will be used for joist. 

Width (b) – shows b size of selected type.

Depth (h,d) – shows h or d size of selected type. 

Define Depth (h,d) by Layer ThicknessRoof+M will automatically create new type for selected family with new depth equal to selected roof layer thickness. 

Rotate 90°, Rotate 180°

Rotate 90°, 18 – joist can be rotated 90/180 degrees to its initial position. 

Rotate 90° is ticked:

Rotate 90° is unticked:

Insert Direction from Selected Joist

Insert Direction from Selected Joist – predefine insertion direction left or right of selected joist. 

Example: Additional joist is inserted to the left of selected joist:

Distance Lock to

Distance Lock to – an additional joist can be inserted with predefined distance from selected joist, roof start/end, or selected external element.

Distance/Spacing, Spacing and Number

Distance/Spacing – predefine the distance from selected position (selected joist, roof start/end or selected external element) to additional element.

Spacing – the distance between joists.

Number – the number of joists.

Example: Two additional joists were added to the right side of selected joist with predefined distance and spacing:


Frame Side

Frame Side – choose whether joist should be applied in the center-centered, center-sided, external, or internal side of the frame.  

Build in Place

Build in Place – writes Yes/No information into the joist instance parameter if it is build-in-place or is prefabricated with whole roof frame. This parameter can later be used in schedules or view filters.