Wooden purlin (1)


Software version: 2020

Last updated April 2, 2020 by Construsoft NL ts-support@construsoft.com

Software version: 
2020
Environment: 
Netherlands

Wooden purlin (1)


System componentcomponent that is included in a Tekla Structures configuration and whose component objects and composition the user can modify within the limits of the component properties

Wooden Purlin (1) can be used to create a connection between a steel beam and a wooden purlin. A purlin shoe is welded to the steel beam, in which a wooden purlin fits. Various profiles can be used to create the purlin shoe, for example U- and L-shaped profiles. The purlin shoe is provided with holes, so the wooden purlin can be fixed using hexagon head wood screws.  

Objects created

  • Purlin shoe

Use for

Situation Description
Wooden purlin shoe U-profile
Wooden purlin shoe I-profile
Wooden purlin shoe
Wooden purlin shoe, purlin notched

 

Before you start

Create a steel beam and a purlin.

Selection order 

  • Activate the component.
  • Select the steel beam (=main part(1) part that exists in a building object and that determines the position number for the assembly or cast unit and the direction of assembly or cast unit drawings

    (1) Main part can be an assembly main part or a cast unit main part.

    (2) input part that the user selects first when creating a component

    (2) Connections and details always have a component main part.

    ).
  • Select the wooden purlin (= secondary part(1) part that exists in a building object and that is connected to the main part

    (1) Secondary part can be an assembly secondary part or a cast unit secondary part.

    (2) input part that the user selects after selecting the component main part when creating a component

    (2) A component can have none, one or more component secondary parts.

    ).
  • The connection is created. 

Piece identification key


 

  Part
1 Purlin shoe profile
2 Bottom plate
3 Bolt group

 

Picture tab


In the Picture tab the shoe profile offset, base platecomponent object that represents a plate welded to a column base

Base plates are used to distribute the concentrated load of the column over a wider area.

offset and notchcut in one component object or input part for receiving another component object or input part

offset can be defined. 

 

Option Description
1 Offset shoe profile from the purlin top. 
2 Offset shoe profile from the steel beam top. This field has priority compared to the purlin (option 1).
If the field is left empty, a default value of  5 mm is applied.
3 Bottom plate offset in the direction of the wooden purlin. Default value is 0.
If the field is left empty and the steel beam bottom is further down than the wooden purlin bottom, the bottom plate extends automatically to the main part web. For example: 

4 Bottom plate offset in the direction of the main part. Default value is 0.
5 When the shoe profile width is insufficient, the wooden purlin will be notched. These three fields can be used to define the notch offset. 

Parts tab


In the Parts tab the bottom 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.

thickness and shoe profile is defined.

Option Description
Bottom plate Define the bottom plate thickness. 

The pos-prefix, assembly-prefix, start number, material, name, and finish can also be defined.

SHOE SECTION - Profile In this field the shoe profile is defined. If this field is left empty, the shoe profile shape will be accordingly to the selected Section type option (see the field below).
SHOE SECTION - Section type In this selection field the shoe profile section type can be defined. This field is only applied when no profile is defined in the Profile field (see the field above).

The following options are available: 

  • UNP
  • UPE
  • INP
  • IPE
  • L
  • U-shaped bended plate
  • L-shaped bended plate

Which profile is used depends on the wooden purlin width. The shoe profile has to be chosen so that the wooden purlin fits the shoe, without the wooden purlin needing to be notched. 

Library profiles are used, except using the last two options (U-shaped bended plate and L-shaped bended plate). Using these two options, the option Create shoe as can be set, in which can be defined if the U- or L-shaped profile is created as a Folded Plate or a Polybeam. The option Polybeam has the advantage an unfolded bent plate drawing with bent lines can be created. 

1 Shoe profile width. If a library section (UNP, UPE, INP,IPE, L) is defined in the Section type field, a width has to be defined which corresponds with the library profiles. 
For example: If the section = UNP, then "80" is a legit value (because this profile exists in the library). The value "90" is not a legit value, because the library does not contain a UNP90-profile. 
When an invalid value is used, the shoe profile will disappear. 
2 Shoe profile flange height. This field only applies for Section type options U-shaped bended plate and L-shape bended plate
3 Shoe profile flange thickness. This field only applies for Section type options U-shaped bended plate and L-shape bended plate.
Shoe reference line Position of the shoe profile reference line.
L position Shoe profile position, if the profile is L-shaped. The options are Left and Right, see the following example: 
        
Create shoe as If in the Section Type field is chosen for a U-shaped bended plate or L-shaped bended plate, this field can be used to define how the plate is created. There can be defined if the U- or L-shaped profile is created as a Folded Plate or a Polybeam.
  • If the option Folded plate is used, it is possible to create an unfolded bent plate drawing with bent lines.
  • If the option Polybeam is used, it is not possible to create an unfolded bent plate drawing with bent lines.

 

It is not possible to create unfolded bent plate drawings from Folded plates.
If a unfolded bent plate drawing is desired, use the Polybeam option. 

 

Holes tab


The Holes tab the holesmall hollow open throughout a part or assembly that is usually used for fastening parts with bolts or other such objects

Hole is created in the same way as bolts and hole properties are defined in the bolt properties.

properties and pattern in the shoe profile is defined.

Option Description
Standard Bolt assembly standard/grade. The default value is 4014-8.8.
Hole size Hole diameter. The default value is 18 mm.
Assembly type Define whether the bolts are assembled on Site or in the Shop. The default value is Site.
Slotted hole X and Y Slotted hole dimensions can be set in x- and y-direction. These fields can also be used to set the tolerance of oversized and tapped holes.

Standard 0 mm is set, which results in a round hole.
1 Number of holes - vertical 
2 Center to center distance - vertical 
3 Hole edge distance - vertical. Edge distance is the distance from the center of a hole to the edge of the part. 
4 Number of holes - horizontal
5 Center to center distance - horizontal
6 Hole edge distance - horizontal.
Vertical offset Vertical shift between bolt groups. 

If on both sides of the shoe profile the purlin is screwed at the same height, chances are the screws hit each other. In order to prevent this, one hole pattern can be vertically shifted. In this way, the screws cannot hit each other. The default value is 0. For example:

Pay attention!: the vertical offset can only be used when the vertical edge distance fields of the bolt group which has to be shifted are left empty. If a value is used in these fields, the edge distance is applied and the vertical shift does not occur. 

 

General tab

Click the link below to find out more: 
General tab

Extra weld parameters tab


In the Extra weld parameters tab is defined how the shoe profile is connected to the main part. 

Option Description
Connect parts as Define how the shoe profile is connected to the main part. The following options are available: 
 
Secondary part of welding
When using the option Secondary part of welding, the shoe profile is dimensioned and labeled as a welded part in the assembly drawing. It is not possible to create a separate assembly drawing of the shoe profile. 
 
Sub-assembly
When using the option Sub-assembly the shoe profile is added as sub-assembly. It is possible to create a separate assembly drawing of the shoe profile. 
In the assembly drawing of the main part the position of the sub-assembly is dimensioned, but the dimensions of the sub-assembly parts is not. This is because this sub-assembly is already fabricated when it is welded to the main part. This results in a better readable assembly drawing. 

 
Modifying the connection type Secondary part of welding < > Sub-assemblyassembly in a nested assembly that is subordinate to a parent assembly

Set the desired connection type before creating the components.
It is not possible to change the connection type afterwards. 

If the connection type must be changed afterwards, the connection must be deleted and recreated with the modified component setting. 
 

Change the connection type afterwards (Secondary part of welding / Sub-assembly) is not possible!
 
If the connection type must be changed afterwards, the connection can only be changed by deleting the component en recreating it with a modified component setting. must be deleted and recreated with the modified component setting.

 

Analysis tab

Click the link below to find out more: 
Analysis tab

Welds

Click the link below to find out more: 
Create welds
 


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of the pictures in relation to the operating systems under which Tekla Structures runs.

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