U.S. Base plate connection (71)

Tekla Structures
2021
Tekla Structures

U.S. Base plate connection (71)

U.S. Base plate connection (71) creates a base plate that connects a column to a beam.

Objects created

  • Base plate

  • Stiffeners (can only be added if the column has a W, I, or a TS profile)

  • Beam stiffener

  • Bolts

  • Welds

Use for

Situation

Description

Base plate is connected to the beam.

Beam and column stiffeners are used.

Beam cantilever is connected to a column with a base plate.

Beam cantilever is connected to a sloped column with a base plate.

Beam cantilever is connected to a column with a base plate.

Beam stiffeners are used.

Beam cantilever is connected to the column with a base plate.

Beam and column stiffener are used.

Before you start

Create a beam and a column.

Selection order

  1. Select the main part (beam).

  2. Select the secondary part (column).

    The connection is created automatically.

Part identification key

Part

1

Beam stiffener

2

Stiffeners 1, 2, 4, 5

3

Base plate

4

Stiffeners 3, 6, 7, 8

Picture tab

Use the Picture tab to control the stiffener chamfering and the base plate chamfers.

Stiffener chamfering

Description

1

Top chamfer width for stiffeners 1, 2, 4, 5.

2

Top chamfer height for stiffeners 1, 2, 4, 5.

3

Bottom chamfer height for stiffeners 1, 2, 4, 5.

4

Bottom chamfer width for stiffeners 1, 2, 4, 5.

5

Top chamfer width for stiffeners 3, 6, 7, 8.

6

Top chamfer height for stiffeners 3, 6, 7, 8.

7

Bottom chamfer height for stiffeners 3, 6, 7, 8.

8

Bottom chamfer width for stiffeners 3, 6, 7, 8.

9

Weld gap.

10

Gap between the beam stiffeners and the beam top and bottom flange.

Base plate chamfering

Description

1

Width of base plate chamfer 1.

2

Height of base plate chamfer 1.

3

Height of base plate chamfer 2.

4

Width of base plate chamfer 2.

5

Width of base plate chamfer 3.

6

Height of base plate chamfer 3.

7

Height of base plate chamfer 4.

8

Width of base plate chamfer 4.

Parts tab

Use the Parts tab to control the dimensions of the base plate, stiffeners, and beam stiffener.

Plate

Option

Description

Default

Plate

Base plate thickness, width and height.

Thickness = 20 mm

Width depends on the column profile.

Height depends on the column profile.

The default name is BASEPLATE.

Stiffeners 1,2,4,5

Stiffener 1, 2, 4, 5 thickness, width and height.

Stiffeners 3, 6

Stiffener 3, 6 thickness, width and height.

Stiffeners 7,8

Stiffener 7, 8 thickness, width and height.

Beam Stiff

Beam stiffener thickness, width and height.

Option

Description

Default

Pos_No

Prefix and start number for the part position number.

Some components have a second row of fields where you can enter the assembly position number.

The default part start number is defined in the Components settings in File menu > Settings > Options.

Material

Material grade.

The default material is defined in the Part material box in the Components settings in File menu > Settings > Options.

Name

Name that is shown in drawings and reports.

Parameters tab

Use the Parameters tab to control the square cut corners, plate offset and bolt properties.

Plate properties

Option

Description

Square cut corners (1-4)

Cuts made on the corners of the base plate.

If you enter a number corresponding to one of the corners of the base plate, the corner has a square cut instead of a diagonal chamfer. You can enter the numbers for one or all the corners.

Plate aligned with

Define whether the plate is aligned with the column or the connection symbol.

Base plate offset

Description

1

Base plate horizontal offset from the column center.

2

Base plate vertical offset from the column center.

Base plate with holes or bolts

Option

Description

Default

Bolts are created.

AutoDefaults can change this option.

Bolts are created.

Holes are created.

Bolt group rotation

You can define the bolt group rotation around its center. To rotate the bolt group, enter the rotation angle (in degrees).

Positive angle rotates the bolts in a counter-clockwise direction and negative angle in a clockwise direction.

Description

1

Bolt group rotation angle.

Bolt properties

Option

Description

Eliminate bolt numbers

Define which bolts are deleted from the bolt group.

Enter the bolt numbers of the bolts to be deleted and separate the numbers with a space. Bolt numbers run from left to right and from top to down.

Eliminate external bolts

Define whether external bolts are deleted.

Using additional components

You can use additional system or custom components to modify the column end or the base plate. For example, you can create special backing plates, weld preparations, and weld access holes for the column end.

If you use additional system or custom components, you need to manage the column end or the base plate properties in the additional component in question. When using several components, there may be multiple welds and cuts.

Option

Description

Component

Define a system or a custom component by selecting it from the component catalog.

Attributes

Enter the name of the attribute file for the selected component.

Input

Define to which parts the selected component is applied.

  • Default is same as Base + Column.

  • Column sets the column as the main part. Use this option for details.

  • Column + Base sets the column as the main part and the base plate as the secondary part.

  • Base + Column sets the base plate as the main part and the column as the secondary part.

  • Base sets the base plate as the main part.

Stiffeners tab

Use the Stiffeners tab to control stiffener positions and offsets.

Stiffener positions (1-8)

Option

Description

Stiffener Positions (1-8)

Placement of the stiffeners.

Only the stiffeners whose numbers are entered in the field are attached to the column.

Stiffener offset

Stiffener offset allows the stiffeners to be moved. Enter a negative value to move the stiffener in the opposite direction.

Description

1

Stiffener 1 offset.

2

Stiffener 2 offset.

3

Stiffener 3 offset.

4

Stiffener 4 offset.

5

Stiffener 5 offset.

6

Stiffener 6 offset.

7

Stiffener 7 offset.

8

Stiffener 8 offset.

Beam Stiff tab

Use the Beam Stiff tab to control the beam stiffener alignment, stiffener side, chamfer dimensions and types.

Left stiffener

Option

Description

Default

Left stiffeners are created.

AutoDefaults can change this option.

Left stiffeners are created.

Left stiffeners are not created.

Center stiffener

Option

Description

Default

Center stiffeners are created.

AutoDefaults can change this option.

Center stiffeners are created.

Center stiffeners are not created.

Right stiffener

Option

Description

Default

Right stiffeners are created.

AutoDefaults can change this option.

Right stiffeners are created.

Right stiffeners are not created.

Stiffener alignment

Options

Description

Default

Stiffeners are aligned with the beam.

AutoDefaults can change this option.

Stiffeners are aligned with the beam.

Stiffeners are aligned with the column.

Stiffener creation

Option

Description

Default

Stiffeners are created on both sides.

AutoDefaults can change this option.

Stiffeners are created on both sides.

Stiffeners are created on far side.

Stiffeners are created on near side.

Stiffeners are not created.

Chamfer dimensions

Description

1

Horizontal dimension of the chamfer.

2

Vertical dimension of the chamfer.

Top and bottom chamfer type

Option for top chamfer

Option for bottom chamfer

Description

Default

No chamfer

AutoDefaults can change this option.

No chamfer

Line chamfer

Convex arc chamfer

Concave arc chamfer

Stiffener offset

Stiffeners can be moved from the center of the beam horizontally or vertically. Enter a negative value to move the stiffeners in the opposite direction.

Description

1

Left stiffener vertical offset.

2

Center stiffener vertical offset.

3

Right stiffener vertical offset.

4

Left stiffener horizontal offset.

5

Center stiffener horizontal offset.

6

Right stiffener horizontal offset.

Bolts tab

Use the Bolts tab to control the bolt properties.

Bolt group dimensions

Description

1

Select how to measure the dimensions for horizontal bolt group position.

  • Left: From the left edge of the secondary part to the leftmost bolt.

  • Middle: From the center line of the secondary part to the center line of the bolts.

  • Right: From the right edge of the secondary part to the rightmost bolt.

2

Dimension for horizontal bolt group position.

3

Bolt edge distance.

Edge distance is the distance from the center of a bolt to the edge of the part.

4

Number of bolts.

5

Bolt spacing.

Use a space to separate bolt spacing values. Enter a value for each space between bolts. For example, if there are 3 bolts, enter 2 values.

6

Select how to measure the dimensions for vertical bolt group position.

  • Top: From the upper edge of the secondary part to the uppermost bolt.

  • Middle: From the center line of the bolts to the center line of the secondary part.

  • Below: From the lower edge of the secondary part to the lowest bolt.

7

Dimension for vertical bolt group position.

Bolt basic properties

Option

Description

Default

Bolt size

Bolt diameter.

Available sizes are defined in the bolt assembly catalog.

Bolt standard

Bolt standard to be used inside the component.

Available standards are defined in the bolt assembly catalog.

Tolerance

Gap between the bolt and the hole.

Thread in mat

Defines whether the thread may be within the bolted parts when bolts are used with a shaft.

This has no effect when full-threaded bolts are used.

Yes

Site/Workshop

Location where the bolts should be attached.

Site

Slotted holes

You can define slotted, oversized, or tapped holes.

Option

Description

Default

1

Vertical dimension of slotted hole.

0, which results in a round hole.

2

Horizontal dimension of slotted hole, or allowance for oversized holes.

0, which results in a round hole.

Hole type

Slotted creates slotted holes.

Oversized creates oversized or tapped holes.

No hole does not create holes.

Rotate Slots

When the hole type is Slotted, this option rotates the slotted holes.

Slots in

Part(s) in which slotted holes are created. The options depend on the component in question.

Bolt assembly

The selected check boxes define which component objects (bolt, washers, and nuts) are used in the bolt assembly.

If you want to create a hole only, clear all the check boxes.

To modify the bolt assembly in an existing component, select the Effect in modify check box and click Modify.

Bolt length increase

Define how much the bolt length is increased. Use this option when, for example, painting requires the bolt length to be increased.

Staggering of bolts

Option

Description

Default

Not staggered

AutoDefaults can change this option.

Not staggered

Staggered type 1

Staggered type 2

Staggered type 3

Staggered type 4

General tab

Click the link below to find out more:

General tab

Design tab

Click the link below to find out more:

Design tab

Analysis tab

Click the link below to find out more:

Analysis tab

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