Eaves haunch (102)

Tekla Structures
Modified: 29 Oct 2024
2025
Tekla Structures

Eaves haunch (102)

Eaves haunch (102) creates a connection between a column and a rafter at the eaves of a portal frame.

Objects created

  • End plate

  • Compression stiffener

  • Morris stiffener

  • Rib stiffeners

  • Cap plate

  • Vertical haunch plate

  • Horizontal haunch plate

  • Bolts

  • Welds

Use for

Situation Description

Connection between a column and a rafter

Limitations

  • Rafter webs must lie in the same vertical plane.

  • If you apply a stay to the haunch, and then modify the haunch profile, the stay position will not be recalculated. In this situation, you also need to modify the cold rolled overlap or sleeved component used in creating the stays. The image below shows an example of this situation.

Selection order

  1. Select the main part.

  2. Select the secondary part.

    The connection is created automatically when the secondary part is selected.

Part identification key

Description

1

End plate

2

Haunch plate

3

Rib stiffener

4

Morris stiffener

5

Compression stiffener

Picture tab

Use the Picture tab to define the connection dimensions.

Dimensions

Description

1

Horizontal distance to the top end of the Morris stiffener to allow access to the bolts in the end plate.

The default value is 75 mm.

2

Top edge distance of the end plate above the intersection between the top flange of the rafter and the column.

Bottom edge distance of the end plate below the intersection of the haunch plate flange and the column.

3

End plate edge distance from the column flange.

4

Horizontal dimension of the haunch plate from the end plate.

5

Vertical dimension of the haunch plate from the rafter flange.

Parts tab

Use the Parts tab to define the part properties.

Parts

Option Description Default

End plate

Thickness and height of the end plate.

The default thickness for the end plate is based on the section depth of the rafters. For rafter depths of < 400, the thickness is 20 mm, and for depths of < 700, the thickness is 25 mm, otherwise the thickness is 30 mm.

The default height is determined from the haunch depth.

Comp stiffener

Thickness and width of the compression stiffener.

The default thickness for the compression stiffener is based on the section depth of the rafters. For rafter depths of < 400, the thickness is 20 mm, and for depths of < 700, the default thickness is 25 mm, otherwise the thickness is 30 mm.

The default width depends on the flange thickness of the column.

Morris stiffener

Thickness and width of the Morris stiffener.

Thickness: 10 mm

The default width depends on the flange thickness of the column.

Rib stiffeners

Thickness, width, and height of the rib stiffener.

Thickness: 10 mm

The default width of the rib stiffeners is determined from the flange width of the column.

The default length of the rib stiffeners is the rib stiffener width.

Cap plate

Thickness, width, and height of the cap plate.

To create the cap plate, select either the full or partial cap plate creation option on the Parameters tab.

Thickness: 10 mm

The width is determined from the flange width of the column.

Weld 8 is used for both the cap plate and the Morris stiffener if both are created.

Vert haunch pl

Thickness of the vertical haunch plate.

Horiz haunch pl

Thickness and width of the horizontal haunch plate.

Haunch profile

Select the profile from the profile catalog.

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 define the haunch length, number of rib stiffeners, haunch plate chamfers, cap plate creation, and column fitting.

Haunch length and rib stiffeners

Option Description

Haunch length

Horizontal distance from the center line of the column to the intersection between the haunch flange and the bottom flange of the rafter.

Number of rib stiffeners

Define the number of rib stiffeners.

Rib stiffeners are placed between each pair of bolts that connect the rafter to the column.

The number of rib stiffeners might be reduced if it is impossible to place all of them with the current bolt pattern.

Dimensions

Description

1

Distance above the intersection between the flange top of the rafter and the column if the Fit column top setting is set to square.

By default, the column is aligned with the top of the end plate.

2

Vertical distance from the intersection between the rafter and column center line to the bottom of the haunch plate flange.

3

Horizontal cut dimension of the haunch plate.

Stiffener chamfer dimensions

Description

1

Define the horizontal and vertical chamfer dimension to create the chamfer.

By default, a chamfer is not created.

Cap plate creation

Select whether the cap plate is created, and define the edge distance between the outside face of the column and the cap plate.

Option Description

Default

Cap plate is not created.

AutoDefaults can change this option.

Cap plate is not created.

Full cap plate is created across the column.

Define the edge distances from both sides of the cap plate to the column edge.

If needed, you can modify the length of the plate on the Parts tab using the height setting.

Partial cap plate is created from the column center.

Define the distance to the column edge.

If needed, you can modify the length of the plate on the Parts tab using the height setting.

Fit column top

Option Description

Default

Column top is not fitted.

If a cap plate is created, it is placed to the existing top level of the column.

AutoDefaults can change this option.

Column top is not fitted.

If a cap plate is created, it is placed to the existing top level of the column.

Bevel

Column top is aligned with the rafter top flange.

If a cap plate is created, the cap plate top is aligned with the rafter top flange.

Square

Define the column top level extension or cut above the intersection between the flange top of the rafter and the column.

Vertic/rafter tab

Use the Vertic/rafter tab to define the vertical layout of bolts through the end plate, positioned down from the top of the rafter.

Bolt group dimensions

Description

1

Dimension for vertical bolt group position.

2

Dimension for horizontal bolt group position.

3

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.

4

Bolt edge distance.

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

5

Number of bolts.

6

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.

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

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 holes.

No hole does not create holes.

Tapped creates tapped 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

Vertic/haunch tab

Use the Vertic/haunch tab to define the vertical layout of bolts through the end plate, positioned up from the bottom of the haunch.

Bolt group dimensions

Description

1

Dimension for vertical bolt group position.

2

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.

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.

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

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 holes.

No hole does not create holes.

Tapped creates tapped 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.

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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