Overview of snow loading using the snow wizard

Tekla Structural Designer
2020
Tekla Structural Designer

Overview of snow loading using the snow wizard

This section provides a brief overview of snow loading in Tekla Structural Designer.

The intensity of snow load is based upon geographic location, building/roof geometry, environmental factors and local roof factors.

All snow loading falls into three categories:

  • Uniform Snow load (the first fall of snow)

  • Drifted uniform snow (the first fall of snow blown into uneven uniform loading)

  • Drift loading (local build-up of snow load behind steps, objects, parapets)

Prior to running the Snow wizard... you should ensure that roofed areas of the model are 'clad' with roof panels.

The Snow wizard... can then be run in order to define the basic snow load factors and in the case of the Eurocode, the snow load cases and types relevant to the particular National Annex.

From this information all the required snow loadcases are automatically set up and the loads in the undrifted (or balanced) snow load case are created.

Following the wizard, you then manually define the drift cases. To do this, select the relevant snow loadcase, and then define the key attributes for the drift load prior to placing the load in the relevant position on the roof of the building.

The end result is a series of snow loadcases ready to be combined in the Combination Generator with other load cases.

The basic steps are summarized as follow:

  1. Apply Roof Panels to the model
  2. Run the Snow wizard...
  3. Apply snow loads to the drift loadcases set up by the wizard
  4. Combine snow loadcases into design combinations
  5. Perform the static design
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