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Create slab or mat openings

Tekla Structural Designer
2020
Tekla Structural Designer

Create slab or mat openings

When you have created slabs or mats, you can create different kinds of openings to them according to your needs. You can define rectangular, circular, and irregular openings. For more information on how to create and delete slab and mat openings, see the following instructions.

Simple openings

You can quickly define simple openings within existing slabs. Simple openings are rectangular or circular in plan.

The Slab Opening command is located on the list in the Slabs group. The command is only active in 2D views.

Slab openings can:

  • Cross more than one slab item or slab

  • Be overlaid or joined to create openings which together have shapes other than rectangular

  • Cut across a stepped edge

  • Be applied to level an sloping slabs

Openings cannot:

  • Be applied to one-way spanning slabs

  • Reside within or cut a column drop

Irregular Openings

Alternatively, you can create more complex openings by using construction lines and constructing slab items around an irregular shape.

Create rectangular openings

  1. Open a 2D view of the level containing the slab item or mat panel within which you want to create an opening.
  2. Do one of the following:
    To Do this
    Create slab openings
    1. On the Model tab, click the arrow on the top right corner of the Slabs group.
    2. In the list that appears, select Slab Opening.
    Create mat openings
    • On the Foundations tab, clickMat Opening.

    The opening properties are viewed in the Properties window.

  3. In the Properties window, set the Opening Type to Rectangular.
  4. If necessary, specify a rotation angle to rotate the opening on plan.
  5. Click within the outline of an existing slab item or mat panel to define the first corner of the opening, or press F2 to define its exact position.
  6. Drag the mouse pointer to the opposite corner of the opening.
  7. Click the opposite corner of the opening, or press F2 to define its exact position.

    Tekla Structural Designer creates the opening.

Create circular openings

  1. Open a 2D view of the level containing the slab item or mat panel within which you want to create an opening.
  2. Do one of the following:
    To Do this
    Create slab openings
    1. On the Model tab, click the arrow on the top right corner of the Slabs group.
    2. In the list that appears, select Slab Opening.
    Create mat openings
    • On the Foundations tab, click Mat Opening.

    The opening properties are viewed in the Properties window.

  3. In the Properties window, set the Opening Type to Circular.
  4. Click within the outline of an existing slab item or mat panel to define the center of the opening, or press F2 to define its exact position.
  5. Drag the mouse pointer to define the radius of the opening, or press F2 to define the exact radius.

    Tekla Structural Designer creates the opening.

Delete slab or mat openings

  1. In the Structure tree, open the Slab Openings branch.
  2. Right-click the name of the slab or mat opening that you want to delete.
  3. In the context menu, select Delete.

    Tekla Structural Designer deletes the opening.

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