Strap Joint

"Civil Engineering functions" docking window > Steel Engineering > Connections > Front side to web/flange side > Flange > Strap joint (2310)

Use this function to connect two beams with a strap joint. This connection type consists of one or two bolted or welded straps and can be created with or without stiffeners. Supported for this connection are I-beams or U-beams or flat steels. You can also insert weld seams as well as holes for galvanisation (when connecting with stiffener).

Beams connected with strap joint - Connection type: Notch)

 

Identify the two beams that you want to connect. The dialogue window for strap joints is displayed.

 

Click the Preview button if you want to display a preview of the connection based on the currently entered data. If you want to modify the current data, apply the required changes and click Preview again to update the preview. Click OK to insert the connection according to the current data and close the dialogue window. If you click the Cancel button, the window will be closed, and the specified or changed connection will not be inserted.

 

Selected parts

Click on this symbol to display further information on the identified beams, e.g. material, dimensions etc. Value inputs are not possible here.

The settings in the dialogue window can be saved as Favourites and reused at any time. To do this, click on the at the bottom left of the window to activate the context menu. More about Favourites management can be found in the Manage Favourites topics of the HiCAD Basics Help.

 

Please note:

 

Important:

If not all options of the dialogue window are possible due to the position of the identified beams, this will be indicated in the dialogue window by the symbol on the OK button. When you move the cursor over the symbol, an explanatory text will be displayed.

Connection type

Here you specify how the first selected beam is to be connected:

Depending on the selected option, input fields of other tabs will be greyed out. For example, if you have chosen the Notch option, no value inputs will be possible on the Stiffener tab.

(1) With stiffener, (2) Without stiffener, (3) With notch

Configure connection

The configuration of the strap joint takes place via the tabs of the dialogue window:

Depending on the selected option, input fields of other tabs will be greyed out. For example, if you have chosen the Notch option, no value inputs will be possible on the Stiffener tab.

 

Strap

On this tab you define the geometry of the strap. It depends on the selected connection type which input fields will be available.

 

Semi-finished product

Click on the symbol to select the strap type and the material directly from the standard part catalogues.

Create

Here you determine by activating the corresponding radio button whether the strap is to be created on both sides or only on the left or right on the 1st beam.

 

The settings beneath Vertical and Horizontal determine the size and position of the strap.

Vertical

Here you specify how the height of the strap is to be determined by entering the required values:

  • Height, projection top (referring to 1st beam)
  • Height, projection bottom (referring to 1st beam)
  • Height, centred
  • Projections beyond 1st beam
  • Height, distance to fillet start at top , 1st beam
  • Height, distance to fillet start at bottom, 1st beam
  • Distances to fillet starts, 1st beam

Alternatively, you can also specify that the values refer to the notch by activating the Refer distances to notch check box. If, for example, you have selected Height, projection top beneath Vertical, then the value at the top is the projection of the beam if the checkbox is inactive, and the projection of the notch if the checkbox is active.

Horizontal

These settings are only available for the connection types Without stiffener and With stiffener.

The distance here is the distance between beam start and strap end. Furthermore, the distance to the flange or the web can be specified here.

For an insertion With stiffener you can also specify the Fillet radius for the stiffener.

Bore grid

The bore grid determines the arrangement of the bore pattern for the bolting. Specify the number of bores in X- and Y-direction and their distance to each other. If you want all bores running in one direction to have the same distance, you can achieve this by entering the distance value in only one field and clicking on the Equidistant symbol.

Bore grid (Positioning)

Beneath Bore grid (Positioning) you specify how the bore grid is to be placed on the strap. To do this, enter either the

  • distance between the centre of the bore grid and the strap end,
  • distance between the last bore row and the strap end,
  • distance between the start of the 1st beam and the centre of the bore grid, or the
  • distance between the start of the 1st beam and the first bore row.

In this section you can also specify whether the back and/or front corners of the strap are to be filleted. Filleting the front corners is only possible with welded straps (without stiffener / without notch). In this way, the rolling radii of the continuous beam can be taken into account.

Notch

If you have selected the connection type Notch, you can specify the settings for the notch here.

 

Upper/Lower notch

First, the distance between the end of the beam to be notched and the web of the connecting beam is required. The horizontal and vertical distances can be set separately for the upper and lower notch. Which distance is defined here is determined via the graphic selection boxes.

Horizontal distance to  Vertical distance to

 

Steg des Anschlussprofils

 

Außenkante des auszuklinkenden Profils

 

Flansch des Anschlussprofils

 

Flansch Innenkante des Anschlussprofils

 

Ende des auszuklinkenden Profils

 

Flansch Außenkante des Anschlussprofils

The settings for the upper notch can also be applied to the lower notch by clicking on the icon and vice versa.

 

Orientation

The orientation can be parallel to the web or perpendicular to the beam axis of the target beam or the beam to be notched.

 

Parallel to web / Relative to target beam

 

Parallel to web / Relative to notched beam

 

Corner processing

Two variants for corner processing are available:

Choose the variant you require and enter the bore diameter or radius.

 

If the Dimensions acc. to DAST checkbox has been activated, the next higher values from "DSTV Typified connections in steel structural engineering" (Vol.1, Paragraph "IK Notches") will be used.

Stiffener

If you have selected the connection type With stiffener, specify the data for the stiffener here.

 

Click on the symbol to select the desired semi-finished product for the stiffener from the catalogue.

Further parameters are:

Type

Activate the corresponding radio button to determine whether a full stiffener or a partial stiffener is to be installed.

Dimensions

Full stiffener
Specify the width of the stiffener, or activate the Auto checkbox if you want HiCAD to determine the width automatically. In this case the width will be determined which fills the area between the 2nd plate and the web (rounded to whole millimetres) - taking into account the specified clearance.


Partial stiffener
Specify the width of the stiffener, or activate the Auto checkbox if you want HiCAD to determine the width automatically. In this case the width will be determined which fills the area between the 2nd plate and the web (rounded to whole millimetres) - taking into account the specified clearance.

Internal corner

In these areas you specify the data for the internal corner. Select the Type:

  • Ext. fillet,
  • Int.fillet, or
  • Chamfered.

Depending on the selected type, enter the chamfer length or the fillet radius. If you want HiCAD to determine the value, activate the Auto checkbox.

Others

Here you can enter a value for the clearance.

Optional stiffener

By activating this checkbox, a second stiffener can be installed. Select the desired semi-finished product for the stiffener by clicking on the symbol in the catalogue.

For the optional stiffener, the Type selected under Internal corner is used. If the stiffener is chamfered, for example, this also applies to the optional stiffener.

(1) Stiffener; (2) Optional stiffener

If the connection type With stiffener is selected for the strap joint, the Galvanization tab is also available.

 

Here you determine whether the stiffeners are to be provided with holes for galvanization. Activate the corresponding checkboxes and enter the desired diameter. In addition, you can specify the minimum distance of the holes to the flange and to the web.

Boltings

On this tab you determine how the strap is to be mounted on the beam.

Here you can define boltings, e.g. type of bolt or screw, the bore diameter, etc. To do this, click on the symbol and then choose the components of the bolting. The default setting defined by the ISD is DIN EN ISO 4014-M16-5.6 / M16 ⌀ 17,5). You proceed in the same way as you would do with the Bolting function.

The bolting will only be inserted if the Fit checkbox has been activated. If you want to Invert the bolting, activate the same-named checkbox.

A usage can be assigned to these assemblies in the dialogue window of the connection. If one of these assemblies was already assigned a usage type, the usage type specified in the dialogue window was ignored in previous versions. The Overwrite usage checkbox can be used to specify whether the existing usage is to be kept or replaced by the usage type selected on the Bolting tab (or Fixing or Beam tab, depending on the connection).

The bolting will be inserted as an assembly called Bolting. At Assignment you determine, by activating the corresponding radio button, whether this bolting assembly is to be assigned to the assembly of the 1st profile or installed as a "loose part" (structure assembly)

 

Weld seams

Here you determine, by activating the corresponding checkbox, whether the insertion is to be carried out with or without weld seams. For an insertion with weld seams, specify the following parameters:

 

Connections + Variants (3-D SE) • Dialogue Window for Connections (3-D SE) • The Catalogue System for Connections + Variants (3-D SE)