Create a steel lofted plate

Tekla Structures
2024
Tekla Structures

Create a steel lofted plate

With lofted plates you can create rolled plates with varying shapes and plates with double-curved form, for example.

Prerequisites and examples of lofted plates

Before you can create lofted plates, you need to have construction objects in your model. Tekla Structures creates the shape of the lofted plate according to the geometry of the used construction objects, by connecting the start point of the first construction object to the start point of the second construction object. The end points of construction objects are connected in similar way.

You can connect the following construction objects as a lofted plate:

  • construction line to construction line

    For example:

  • construction line to construction arc

    For example:

  • construction arc to construction arc

    For example:

  • construction circle to construction circle

    For example:

  • construction polycurve to construction polycurve

Create a lofted plate

  1. Create the needed construction objects in the model. The shape of the lofted plate is based on the construction objects' shape.

    You need to have

    • construction lines

    • construction arcs

    • construction circles

      or

    • construction polycurves

      With polycurves, use the Create arc by tangent or Create tangent line options on the construction polycurve toolbar. To create polycurves only with straight segments, use the Create line option . Note that the construction polycurves do not need to have the same number of segments, as long as both of them are tangential.

  2. When you have created the needed construction objects, go to the Steel tab and click Plate > Create lofted plate.
  3. On the toolbar that appears, click a button to specify whether to create the lofted plate by using two construction objects, or by using a construction object and a point.
    • Use two construction objects to create a lofted plate:

      1. Select the first construction object: line, arc, circle, or polycurve.

        For example, if you are using two construction circles to create a lofted plate.

      2. Select the second construction object.

        Tekla Structures creates the lofted plate between the selected construction objects, using the Lofted plate properties in the property pane.

    • Use one construction object and a point to create a lofted plate:

      1. Select the first construction object: line, arc, circle, or polycurve.

        For example, if you are using a construction polycurve and a point to create a lofted plate.

        Tekla Structures shows a preview of the part geometry. Use the preview to set the direction and size of the lofted plate.

      2. Pick a point.

        Tekla Structures creates the lofted plate based on the preview, using the Lofted plate properties in the property pane.

Modify the shape of a lofted plate

Use direct modification dimension handles and dimension values to modify the lofted plate shape.

  • Modify, for example, the height and radius of the lofted plate.

  • For lines and arcs: drag the arc symbol at the midpoint of a line or an arc to modify the lofted plate shape.

Split a lofted plate

Note that you cannot split closed cylindrical or conical lofted plates.

  1. On the Edit tab, click Split.
  2. Select the lofted plate you want to split.
  3. Pick a point for the dividing line.

    Tekla Structures splits the lofted plate.

    For example:

Swap the end handle points to correct the geometry of a lofted plate

In some cases when you try to create a lofted plate, the geometry of the plate would become self-intersecting, meaning that the start and end points of the top and bottom construction object are opposite of each other. In these cases the plate is not created.

You can try to resolve the situation and create the lofted plate by changing the modeling direction of the construction lines or arcs.

  1. Select the construction line or the construction arc.

    With construction lines, ensure that the Direct modification switch is not active. You can then see the yellow and magenta object handles.

  2. On the contextual toolbar, click Swap ends.

    Tekla Structures changes the modeling direction of the selected construction object, and the lofted plate can be created correctly.

With construction circles you can try to resolve the situation by moving either of the circles.

Unfold lofted plates

You can unfold lofted plates in single-part drawings. The unfolding works for lofted plates which have been created from single geometry to single geometry, and for tangential polycurve lofted plates.

Examples of unfolded lofted plates created from single geometry to single geometry:

Examples of tangential polycurve unfolded lofted plates:

Modify lofted plate properties

  1. If the property pane is not open, double-click the lofted plate to open the Lofted plate properties.
  2. Change the properties as needed.
  3. Click Modify.

Lofted plate properties

Use the Lofted plate properties in the property pane to view and modify the properties of a steel lofted plate. To open the properties, double-click the steel lofted plate. The file name extension of a steel lofted plate property file is *.lpl.

If you have customized the property pane layout, the list of properties may be different.

Setting

Description

General

Name

User-definable name of the lofted plate.

The name can contain a maximum of 61 characters.

Tekla Structures uses part names in reports and in Document manager, and to identify parts of the same type.

Profile

Profile of the lofted plate.

Material

Material of the lofted plate.

Finish

Type of finish.

Finish is user definable. It describes how the part surface has been treated, e.g. with anti-corrosive paint, hot galvanized, fire retardant coating, etc.

Class

Use to group lofted plates.

For example, you can display parts of different classes in different colors.

Numbering series

Part numbering

Part prefix and start number for the part position number.

Assembly numbering

Assembly prefix and start number for the assembly position number.

Face type

Face type

Select whether the top and bottom faces of the plate are flush with the plane.

Perpendicular:

The top and bottom faces of the plate are non-linear.

Bounded by curved planes:

The top and bottom faces of the plate are planar.

IFC export

IFC entity

For IFC export, select the IFC entity type and subtype of the part. The available subtypes depend on the selected IFC entity.

You can select the IFC4 subtype among the predefined options, or you can select USERDEFINED and then enter any text in User-defined type (IFC4).

Subtype (IFC4)

User-defined type (IFC4)

More

UDAs

Click the User-defined attributes button to open the user-defined attributes (UDAs) of the part. UDAs provide additional information about the part.

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