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How to add different haunches at the sides of the elements?

In SCIA Engineer you can add haunches on both sides of the element only if they have the same size and section. In this FAQ is shown how to assign haunches on both sides of the element with different dimensions.

The first step is to add the different haunches to the section library

Cross Section Menu   Cross Section - Haunch

The option used to assign these properties to the 1D element is in the “Structure” menu, under the “1D member components”, selecting the option “arbitrary profile”.

Arbitrary Profile

In this case, you can add three (or more if you model the two rafters as polyline) parts in the option “Edit Span”. The first one will be your first haunch, the middle part of the section of the rafter, and the third part your second haunch.

Haunch properties

In the example below is taken a rafter with section IPE 240: two haunches of different high and length are added.

Haunch properties

The parameters to set in order to create the first haunch are:

Haunch properties

Please focus on the "Alignment" and on the "va" parameters: the top flange is aligned with the section of the rafter, and a variable section from 150 mm to 9,9 mm (thickness of the bottom flange) is assigned.  

 

These are the parameters to set the section of the rafter in the middle part of the element.

Haunch properties

The length of this part needs to be calculated, based on the length of the element, and of the two haunches. In this case, the element is 4,123 m long and the haunches respectively 0,6m and 0,3m long.

 

The parameters to set in order to create the second haunch are:

Haunch properties

Please focus on the "Alignment" and on the "va" parameters: the top flange is aligned with the section of the rafter, and a variable section from 9,9 mm (thickness of the bottom flange) to 90 mm is assigned.