These are special beam-type frequently used in construction.
Tekla Structures v21.1
Tekla Structures v2021
Create such a beam type using the Tekla Structures software.
Go to the "Top view". By using the construction geometry tools,
Press the Esc key to disable the “Create point” tool.
Select the point.
Go to the right-click menu.
Select the “Copy Special- Linear” tab and execute copying
the point 30 times with a step of 200 mm.
Tekla Structures v21.1
Tekla Structures v2021
Select the group of points.
By using the tool “ Copy Special- Linear”, copy the group
of points vertically at 200/2=100 mm with a horizontal offset of 100mm.
Tekla Structures v21.1
Tekla Structures v2021
Switch off the “Snap to any position” tool to avoid missing
Tekla Structures v21.1
Tekla Structures v2021
By means of the “Polybeam” tool, let’s trace a beam,
passing through all the 62 points. Upon completion, do not forget to press
the mouse wheel button or the “Space” key to finalize the operation.
Tekla Structures v21.1
Tekla Structures v2021
It is important to mention that such a type of beam has several limitations:
its width shall not exceed its length value. Let’s check out the
situation when the width profile value is admittedly large enough.
Switch the profile value of polybeam to the rolled metal with dimensions
Tekla Structures v21.1
Tekla Structures v2021
As you can see from the above, it is not possible to create a polybeam
of such a geometry. The software renders the polybeam as a thin line, denoting
there is a must to change the profile settings.
Set out the profile type to a reasonable value as “—20*300”.
Tekla Structures v21.1
Tekla Structures v2021
If still the profile geometry is shown as erroneous one, then there is
a need to set out the “Rotation” parameter value by turning
it at 90 degrees, as now the profile is of 300 mm thickness.
Tekla Structures v21.1
Tekla Structures v2021
Toggle between the values of the“Rotation” field to get a
clear understanding of the typical geometry error and the factors causing
it. Depending on the current view settings, the “Rotation”
field values might work in different ways.
Execute the configuring by yourself.
Tekla Structures v21.1
Tekla Structures v2021
Compare your results to the below:
Tekla Structures v21.1
Tekla Structures v2021
Select the object.
By holding the "Alt" key pressed, select all 62 points.
By holding the "Shift" key pressed, double-click at any point
and go to the "Chamfer properties" window.
Configure the chamfer type as “Rounding”.
Indicate the rounding value equal to one-half of the offset value 100/2=50
mm.
Tekla Structures v21.1
Tekla Structures v2021
Go to the view plane by enabling the Ctrl+P hotkey combination.
Create one more beam defined by the extreme points of the polybeam.
Configure the new beam properties as follows: profile value as ”—12*200”,
and class value of 6.
Tekla Structures v21.1
Tekla Structures v2021
Shift the I-beam at 50 mm in the upwards direction by using the Ctrl+M
Tekla Structures v21.1
Tekla Structures v2021
Now, the polybeam flange is located right at the profile center.
Tekla Structures v21.1
Tekla Structures v2021
Rotate the view in the way to see the beam's wall and flange in 3D.
It comes evident that the profile of the beam wall has no vertical offset.
Tekla Structures v21.1
Tekla Structures v2021
Go to the "Polybeam properties" menu and indicate the offset
value equal to the profile thickness according to the scheme of a straight
line beam with a common reference line. See below:
Set the offset value equal to 12 mm.
Tekla Structures v21.1
Tekla Structures v2021
Copy the top plate over the initial plate position and configure its offset
Select the top plate.
Go to the right-click menu.
Enable the “Copy Special -To another object” tab.
Indicate the beam wall as the initial object.
Indicate the beam wall as the destination object. Thus the beam plate
will get copied to the same place.
Tekla Structures v21.1
Tekla Structures v2021
Upon executing the above, the TS will pop up an alert message about the
duplicates created, as the duplicates are causing doubling the weight of
the model and drawings overlapping.
Confirm creating duplicates by pressing the “Keep duplicates”
Tekla Structures v21.1
Tekla Structures v2021
Press the "Esc" key to disable the “Copy” tool.
Select a flange and set out its vertical offset at 300+12=312 mm.
Tekla Structures v21.1
Tekla Structures v2021
The only step left to be done is welding on the parts. Indicate the I-beam
Note that in the current case, only the “Around” type
Tekla Structures v21.1
Tekla Structures v2021
Thus we have created a SIN beam. Other such beams when running a project