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Create bolts

Last updated March 12, 2019 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2019

Create bolts

Create bolts

To create bolts, you can either create a single bolt groupgroup of bolts that forms a connecting building object between an assembly main part and secondary parts

The number of bolts in a bolt group depends on the bolt group shape and the values of bolt distances.

or apply a component that automatically creates bolt groups.

Tekla Structures uses the same command for creating bolts, studs and holes. If you want to create only holes, do not use any bolt elements (such as bolts, washers, and nuts).

You can create different marks for bolts and holes in drawings.

Create a bolt group

  1. On the Steel tab, click Bolt .

    The Bolt properties open.

  2. Modify the Bolt properties, if needed.

    For example, the Bolt group settings affect the end result.

  3. Select the 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.

    , to which the secondary parts will be bolted.
  4. Select the secondary parts.
  5. Click the middle mouse button to finish selecting parts.
  6. Pick a point to indicate the bolt group origin.
  7. Pick a second point to indicate the direction of the bolt group x axis.
    Note:

    Tekla Structures determines the location of the bolt group using the following values: the bolt group x axis and the work planeplane that the user has chosen in a model and that is currently active for working on in a model view

    Newly created, copied, or moved model objects comply with the work plane. For example, shifting the work plane to follow a sloped plane makes it easier to model sloped structures.

    . Dimensions are relative to the bolt group origin, which is the first point picked. Tekla Structures sets the x direction of the bolt group using the second point picked. It is important that the points you pick to create the bolt group are close enough to the parts you want to connect.

Create a single bolt

  1. On the Steel tab, hold down Shift and click Bolt to open the Bolt properties.
  2. Under Bolt group , select Array from the Shape list.
  3. In the Bolt dist X and Bolt dist Y boxes, enter 0.
  4. Create the bolt the same way you would create a bolt group:
    1. Select the main part, to which the secondary parts will be bolted.
    2. Select the secondary parts.
    3. Click the middle mouse button to finish selecting parts.
    4. Pick a point to indicate the bolt origin.
    5. Pick a second point to indicate the direction of the x axis.

Create bolts using the Auto bolt component

Use the Auto bolt component to bolt parts and nearby parts, shimcomponent object that represents a plate that is used for filling clearances and gaps on the construction site

plates, splice plates, or other plates. Auto bolt follows the part rotation and finds the best rotation so that you do not need to set the work plane. With Auto bolt one bolt group can span many parts, for example, manage a splice as a single group

  1. Click the Applications & components button in the side pane to open the Applications & components cataloguser interface for displaying or modifying information in categorized lists

    For example, profile catalog and shape catalog are catalogs.

    .

  2. Start typing auto bolt in the search box.
  3. Double-click Auto bolt in the catalog to open the Auto bolt dialog box.
  4. Define the bolt properties.
  5. If needed, you can show cut lengthbolt property that indicates the depth at which Tekla Structures searches for the sections of the bolted parts

    Cut length determines whether the bolt will go through one flange or two, for example.

    as temporary lines to view where the bolts should be placed even if they are not created.

    • Selectin the list at the bottom of the dialog box to not show the temporary lines.

    • Selectin the list at the bottom of the dialog box to show the temporary lines.

    To delete the temporary lines, right-click the view and select Redraw View.

  6. Click Apply.
  7. Select the main part.

    Auto bolt uses this part to identify the best rotation. This part will be the main part of the assembly.

  8. Select the 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.

    .
  9. Click the middle mouse button.
  10. Pick the first and the second position to define the bolt group direction.

Examples

Examples of parts bolted using the Auto bolt component are shown below. The main parts and the selected points are highlighted.

Create a bolt group by exploding a component

An alternative way to create bolts is to first apply a component that includes bolt groups, and then explodeto ungroup the objects that are parts of another object or a component

In Tekla Structures, it is possible to explode components, cast units, assemblies, bent plates, parts that have attached parts, and drawing shapes and plugins.

The exploded objects cannot be reverted back to the original group.

the component.

  1. Apply a component that includes bolt groups.

    For example, connect two beams, or a beam to a column, using a bolted end plate.

  2. Explode the component.
    1. Select the component to explode.
    2. Right-click and select Explode Component.

      Tekla Structures separates the objects in the component.

  3. Modify the bolt group.
    1. Select the bolt group and double-click it to open the properties.
    2. Modify the properties.
    3. Click Modify.

Change or add bolted parts

You can change the parts a bolt group connects to.

  1. On the Steel tab, click Bolted parts.
  2. Select the bolt group.
  3. Reselect the main and secondary parts.
  4. Click the middle mouse button to finish selecting the parts.

Bolt group shape

Tekla Structures uses the values of the Bolt dist X and Bolt dist Y boxes in the Bolt properties to determine how many bolts the bolt group contains, as shown in the table below:

Shape

Bolt dist X

Bolt dist Y

Array

Spacing between bolts, in the x direction of the bolt group.

Spacing between bolts, in the y direction of the bolt group.

Circle

Number of bolts.

Diameter of the bolt group.

List

x coordinate of each bolt, from the bolt group point of origin.

y coordinate of each bolt, from the bolt group point of origin.

Examples

Bolt group shape

Dimensions

Result

Array

Bolt dist X : 150

Bolt dist Y : 100

Circle

Number of bolts : 6

Diameter : 100

List

Bolt dist X : 75 175 250

Bolt dist Y : 75 -50 0

Bolt properties

Use the Bolt properties to view or modify the properties of a bolt group. The units depend on the settings in File menu > Settings > Options > Units and decimals .

Setting

Description

Bolt

Size

Bolt diameter.

Standard

Bolt assembly standard/grade.

Bolt type

Define whether the bolts are assembled on-site or in the shop.

Connect as

Indicate whether you are bolting a secondary part or a sub-assembly.

Thread in material

Indicate if the thread of the bolt can be inside the bolted parts. Tekla Structures does not use this value when calculating the length of full-threaded bolts.

Cut length

Indicate which parts the bolt connects. The value defines the area Tekla Structures should search for parts that belong to the bolt group. Using cut length you can determine whether the bolt will go through one flange or two.

Tekla Structures searches for parts using half the cut length value, in both directions from the bolt group plane. In the illustration below, A is the cut length and B is the bolt origin. Tekla Structures calculates the search area as A/2 in both directions from point B.

Tekla Structures warns you if the cut length is too small (i.e. the bolt group contains no parts) and makes the bolt length 100 mm.

If there are large gaps between the connected parts, the gap is added to the length of the bolt. Tekla Structures calculates bolt length using the total distance between the first and last surfaces.

NOTE: If you want to force a bolt to be a certain length, enter a negative value for cut length (e.g. -150).

Extra length

Additional bolt length.

Increases the material thickness that Tekla Structures uses when calculating bolt length. For example, you might need extra bolt length to allow for painting. You can also build additional lengths into bolt assemblies.

Assembly

Select whether to create washers and nuts with the bolt.

If you want to create only holes without any bolts, clear all the check boxes.

Bolt group

Shape

Bolt group shape. You have the following options:

  • Array for rectangular

  • Circle for circular

  • xy list for any shape

Bolt dist X

Bolt spacing, number of bolts, or coordinate, depending on the bolt group shape.

Bolt dist Y

Bolt spacing, group diameter, or coordinate, depending on the bolt group shape.

Number of bolts

Number of bolts in a circular bolt group.

Diameter

Diameter of bolts in a circular bolt group.

Holes

Tolerance

Tolerance = Hole diameter - Bolt diameter

Parts with slotted holes

If you want to create oversized or slotted holes, select the desired check boxes to indicate which plies of the connection get special holes.

Special hole type

Oversized, slotted, or no holes. This option becomes active when you select the Special hole check boxes next to Parts with slotted holes.

Slotted hole X

x allowance of a slotted hole. Zero for a round hole.

Slotted hole Y

y allowance of a slotted hole. Zero for a round hole.

Rotate slots

If the bolt connects several parts, you may want to rotate alternate holes by 90 degrees. This allows the bolt to move in different directions.

Oversized

Allowance of an oversized hole.

Position

On plane

Move the bolt group perpendicular to the bolt group x axis.

Rotation

Define how far the bolt group is rotated around the x axis, relative to the current work plane.

For example, you can use this box to indicate on which side of the connected parts you want the bolt head to be.

At depth

Move the bolt group perpendicular to the current work plane.

Offset from

Dx, Dy, Dz

Offsets that move the bolt group by moving the bolt group x axis. Use to change the position of the bolt group.

The start point values Dx , Dy and Dz move the first end of the bolt group, relative to the bolt group x axis. The end point values move the second end of the bolt group.

  • A positive Dx value moves the start point towards the end point.

  • Dy moves the end point perpendicular to the bolt group x axis on the current work plane.

  • Dz moves the end point perpendicular to the current work plane.

An example bolt group with the Dx start point set to 75:

Custom properties

More

Click the More button to open the user-defined attributes (UDAs) of the bolt. UDAs provide more information about the bolts.

Show cut length as temporary lines

This option is available in the Auto bolt component.

Shows where the bolts should be placed even if they are not created.

  • Selectto not show the temporary lines.

  • Selectto show the temporary lines.

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