U.S. Seat connection (72)

U.S. Seat connection (72) connects a beam to a column with a seat profile. You can use the connection with rotated and skewed beams and columns. A stabilizer can be placed as an additional connecting part between the beam and the column.

Objects created

Stiffeners
Seat profile
Stabilizer
Bolts
Welds

Use for


Option	Description
	Beam connected to a column with a seat profile

Selection order

Select the main part (column).
Select the secondary part (beam).

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

Part identification key


	Description
1	Seat profile

Picture tab

Use the Picture tab to define the connection dimensions.

Dimensions


	Description
1	Horizontal seat profile offset
2	Length of the seat


	Description
1	Secondary part offset from the main part
2	Seat offset from the main part

Parts tab

Use the Parts tab to define the part properties.

Parts


Option	Description	Default
Stiffeners	Thickness, width, and height of the stiffeners	The default values for the height and width are based on the seat profile dimensions. The default stiffener thickness is `¼”` or `6 mm` depending on whether metric or imperial units are used in the model.
Seat profile	Select the profile from the profile catalog.	The default seat profile for straight beams is a `6”x 4”x ½”` angle. For vertically skewed beams the default seat profile is a `WT6X15` tee. With straight beams, the seat is placed along a line that is perpendicular to the beam. With vertically skewed beams, the seat is placed along a line that is parallel to the beam. Note that with vertically skewed beams the seat is always welded to the column, as there there is not enough seat surface parallel to the column for bolting.
Stabilizer profile	Select the profile from the profile catalog. Stabilizer is not created unless you select a profile.


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 seat fitting, position and orientation, and stiffener position, shape, and chamfering.

Seat notching and fitting


Option	Description
Seat notching and fitting	Select how the seat is notched and fitted to the column. Notch and fit: The beam is notched and fitted to the column. This is the default value. Notch only: The beam is notched but not fitted. Fit only: The beam is fitted to the column. Do not notch or fit: Beam is not notched or fitted.

Stiffener positions


Option	Description
	Default Stiffener is not placed on the seat. AutoDefaults can change this option.
	Stiffener is not placed on the seat.
	Stiffener is placed on the right side.
	Stiffener is placed in the middle.
	Stiffener is placed on the left side.

Stiffener shape


Option	Description
	Default Rectangular stiffener AutoDefaults can change this option.
	Rectangular stiffener
	Triangular stiffener

Stiffener offsets


	Description
1	Offset of the end stiffeners from the seat ends
2	Offset of the middle stiffener from the seat center line

Stiffener chamfer dimensions


	Description
1	Horizontal chamfer dimension
2	Vertical chamfer dimension

Chamfer type


Option	Description
	Default Line chamfer AutoDefaults can change this option.
	Line chamfer
	Convex chamfer
	Concave chamfer

Beam end cut


Option	Description
	Default Bevel AutoDefaults can change this option.
	Bevel Cuts the end of the secondary beam parallel to the edge of the main part.
	Square Cuts the end of the secondary beam square.

Beam fitting


Option	Description
	Default Beam is notched. AutoDefaults can change this option.
	Beam is notched. Beam end is cut.
	Beam is notched. Beam end is not cut.
	Beam is not fitted to the column.
	Beam is fitted to the column.

Seat position


Option	Description
	Default Seat is placed at the bottom of the beam. AutoDefaults can change this option.
	Seat is placed at the bottom of the beam.
	Seat is placed at the top of the beam.
	Seat is placed both at the top and at the bottom of the beam.

Seat orientation

Define the seat orientation. For example, if the seat is an angle with uneven legs, the default option for non-vertically skewed beams places the longest leg of the angle parallel with the beam, and the shortest leg parallel with the column.


Option	Description
	Default Standard seat, not rotated AutoDefaults can change this option.
	Standard seat, not rotated
	Seat is rotated.

Seat to beam


Option	Description
	Default Seat is bolted to the beam.
	Seat is bolted to the beam.
	Seat is welded to the beam.

Seat to column


Option	Description
	Default Seat is welded to the column. AutoDefaults can change this option.
	Seat is welded to the column.
	Seat is bolted to the column.

Bolts tab

Use the Bolts tab to define bolt group dimensions and bolt properties.

Bolt group dimensions


	Description
1	Dimension for vertical bolt group position.
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.

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 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.

Stabilizer tab

Use the Stabilizer tab to define the stabilizer fitting, position, and orientation.

Stabilizer notching and fitting


Option	Description
Stabillizer notching and fitting	Select how the stabilizer is notched and fitted to the column: Notch and fit: The stabilizer is notched and fitted to the column. This is the default value. Notch only: The stabilizer is notched but not fitted to the column. Fit only: The stabilizer is fitted to the column. Do not notch or fit: The stabilizer is not notched or fitted.

Stabilizer position

Note that the stabilizer cannot be placed in the same position as the seat.


Option	Description
	Default Stabilizer is placed on the left side of the beam. AutoDefaults can change this option.
	Stabilizer is placed on the left side of the beam.
	Stabilizer is placed on the right side of the beam.
	Stabilizer is placed at the top of the beam.
	Stabilizer is placed at the bottom of the beam.

Stabilizer orientation

Define the orientation of the stabilizer. For example, if the stabilizer is an angle with uneven legs, the standard option for non-vertically skewed beams places the longest leg of the angle parallel with the beam, and the shortest leg parallel with the column. Selecting the rotated option reverses this.


Option	Description
	Default Standard AutoDefaults can change this option.
	Standard
	Rotated

Stabilizer dimensions


	Description
1	Stabilizer offset in the direction perpendicular to the beam By default, there is no offset.
2	Stabilizer offset from the column By default, there is no offset.
3	Stabilizer length

Stabilizer to beam


Option	Description
	Default Stabilizer is welded to the beam. AutoDefaults can change this option.
	Stabilizer is bolted to the beam.
	Stabilizer is welded to the beam.

Stabilizer to column

Note that if the column has a tube steel profile, this setting is not taken into account and the stabilizer will be welded to the column.


Option	Description
	Default Stabilizer is welded to the column. AutoDefaults can change this option.
	Stabilizer is welded to the column.
	Stabilizer is bolted to the column.

Stabilizer bolts tab

Use the Stabilizer bolts tab to define the bolt group dimensions and the bolt location and diameter. Define the rest of the bolt properties on the Bolts tab.

Bolt group dimensions


	Description
1	Dimension for vertical bolt group position.
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.

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

Welds

Click the link below to find out more:

Create welds