New part types: lofted plate and lofted slab

Last updated November 7, 2019 by Tekla User Assistance

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New part types: lofted plate and lofted slab

New part types: lofted plate and lofted slab

Tekla Structures 2019i introduces new part types: steel lofted plate(1) part that represents a flat structure

(1) In some contexts, for example in analysis, the term plate object may be used to refer to plates.

(2) plate that represents a steel structure

(2) Plate is mainly used as a connection piece or as a floor plate.

and concrete lofted slabplate that represents a concrete structure

In Tekla Structures, a slab is created by picking three or more points.

Slab may be part of a floor, for example.

. Use lofted plates to model rolled plates and plates with double-curved form, for example. Use lofted slabs to model curved and double-curved slabs or walls, for example.

Prerequisites and examples of lofted plates and lofted slabs

Before you can create lofted plates or lofted slabs , you need to have construction objects in your model. Tekla Structures creates the shape of the lofted part according to the geometry of the used construction objects.

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

  • construction lineconstruction object that represents a line between two points

    to construction line

    For example:

  • construction line to construction arc

    For example:

  • construction arc to construction arc

    For example:

  • construction circleconstruction object that represents a circle

    to construction circle

    For example:

Create a lofted plate or a lofted slab

  1. Create the needed construction objects in the model. The shape of the lofted part is based on the construction objectmodeling aid that represents a point, line, circle, or plane and that helps in placing other objects


    You need to have

  2. Depending on whether you are creating a lofted plate or a lofted slab:
    • On the Steel tab, click Plate > Create lofted plate .

    • On the Concrete tab, click Slab Create lofted slab

  3. On the toolbar that appears, click a button to specify whether to create the part by using two construction objects, or by using a construction object and a point.
    • If you selected Using two construction objects :

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

        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.

    • If you selected Using one construction object and a point :

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

        For example:

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

      2. Pick a point.

        Tekla Structures creates the lofted slab based on the preview.

  4. If you want to modify the shape of the lofted part, use the direct modificationfunction that activates the mode where the model objects can be modified by using handles

    Direct modification enables additional handles and modification options.

    dimension handles and dimension values.

    For example:

Correct the geometry of a lofted plate or split a lofted plate

  • In some cases when you try to create a lofted plate or a lofted slab by using construction lines, arcs, or circles, the geometry of the part would become self-intersecting. In these situations the part is not created, and Tekla Structures displays the following status bar message: The resulting surface would be self intersecting.

    With construction lines or arcs you can try to resolve the situation by changing the modeling direction of the construction lines or arcs. Select the construction line or arc, and on the contextual toolbarfloating toolbar that contains commands for modifying the most common object properties

    The user can customize the contextual toolbar.

    The term mini toolbar is used in Tekla Structures until version 21.1.

    clickSwap ends.

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

  • If needed, you can split lofted parts. You cannot split closed cylindrical or conical lofted parts.

    Use the Split command on the Edit tab.


  • You can create unfolded single-part drawings of non-closed cylindrical and conical lofted plates, meaning that the lofted plate was created by using construction arcs but not construction circles. Other types of lofted plates cannot be unfolded.

  • Rebar sets do not work with lofted parts.

New template attribute IS_LOFTED_PART

Use the IS_LOFTED_PART template attributeattribute in a template object that Tekla Structures uses to calculate and display information from a model database

Template attributes represent object properties.

in filtering, fox example, to check whether the part is a lofted part. The attribute returns 1 if the object is a lofted part, otherwise it returns 0.

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by Sajesh PJ

Nice tool

by Tekla User Assistance

Thank you for your feedback, Sajesh! We are happy to hear that you like this new feature.