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The beam to beam angle cleat connection allows for the design of up to four number flexible beam to column, simple connections. As a simple connection, each joint is designed for the applied vertical shear force. Tying forces can also be specified as part of the disproportionate collapse design checks. The supported beams are assumed to to be perpendicular to the supporting column major and minor axes, in line with the SCI Green Book design model.
The default set up for a connection is to have four number beams, one beam on each column flange and two beams connecting either side of the column web. The default screen layout is shown below. The default beam and column sections are 457x191x67 UB's. The defaults input values are zero. The default layout is shown below.
Note: The default sections are 457x191x67 UB's with 20 mm diameter bolts and 90x90x10 angle cleats. However, this arrangement leads to a dimensional warning, related to width of the angle cleats and the internal dimensions of the supporting column section. Hence this gives a blue background in the graphics area.
The General Area provides inputs to input a connection title and to select the connection topology. The General area also provides a control to filter the displayed options in the property grid and to link the connection with a bracing connection (in the standalone mode) to enable any additional connection forces due to the bracing arrangement to be accounted for automatically in the connection design.
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Filter Properties - controls the display and contents of the property grid panel. The properties are selected by clicking in the row and selecting the required option from the drop down
Title - displays the input connection title. To enter a title, click on the row and input the required title.
Flange Beam Left - displays whether not a left side beam has been selected. The selection is made be clicking on the row and setting the required option from the drop down
Flange Beam Right - displays whether not a right side beam has been selected. The selection is made be clicking on the row and setting the required option from the drop down
Web Beam Left - displays whether or not a beam to the left column web has been selected. The selection is made be clicking on the row and setting the required option from the drop down
Web Beam Right - displays whether or not a beam to the right column web has been selected. The selection is made be clicking on the row and setting the required option from the drop down
Link connection to brace - shows whether or not the connection has been linked to a bracing connection.
To Link to a bracing connection, the "Link connection to brace" option needs to be set to "Yes". To do this, click on the row and use the drop down options. When set to "Yes" two additional options are displayed. These are the 'Bracing joint to Flange' and 'Bracing joint to web' inputs. For each, a bracing joint can be selected by highlighting the row and then selecting the design brief for the connection using the drop down list using the down arrow on the right hand side of the row.
In the case of a linked connection design, the loads due to the bracing connections will be taken account of automatically.
The bolt details and angle grade area provides inputs to control the bolt grade and diameter, along with an input to define the grade of the angle cleat. The default layout of this area is shown below.
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Bolt Details - displays the currently selected bolt grade and diameter. The default bolts are grade 8.8, 20mm diameter bolts
Angle Grade - displays the currently selected steel grade for the angle cleats. The grade can be selected by clicking on the row and using the drop down to selected the required steel grade
To select the bolt grade and diameters, the Bolt Details row can be expanded by clicking on the arrow to the left of the row. This displays the following bolt parameter inputs.
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Bolt Grade - indicates the grade and diameter of the currently selected bolts
Bolt Diameter - indicates the selected bolt diameter. To select a bolt diameter, click to select the row and use the drop down options
Hole Dia - click to select and use the drop down options to select the required bolt diameter as a function of the selected bolt diameter
Slip factor - the slip resistance factor ks for preloaded bolts
Each row can be amended by clicking on the required row and using the drop down to select the required bolt parameter.
The Flange Beam Left - Angle cleats area provides input to define the propertied and dimensions of the angle cleats on the left hand flange beam.
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Shear - displays the currently applied factored shear force
Section - indicates the currently selected section size, type and steel grade
Beam offset - displays the currently defined offset of the beam level from the datum.
Angle Offset - offset of the top of the angle cleat from the top flange of the beam. A positive values moves the cleat up relative to the top of the flange
Cleat Properties - displays the current defined angle cleat thickness and size
To define the left beam section, the Section row can be expanded by clicking on the arrow to the left of the row. The layout of the Section area is shown below.
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Steel Grade - display the currently selected steel grade
Section Type - shows the current section type. The default section is a UB
Section - displays the current section. The default is a 457x152UB67
Cell Depth - displays the overall depth for cellular or castellated beams. The default input is zero, meaning the section is based on the input Section only
To define the left hand side angle cleats, the Cleat Properties row can be expanded by clicking on the arrow to the left of the row. The layout of the Cleat Properties area is shown below.
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Number - the current set number of cleats. A connection can have 1 or 2 angle cleats.
Thickness - the current set thickness of the angle cleat
Web width - the width of the cleat at the supported beam web
Toe Width - the width of the cleat at the supporting beam web
Depth - the depth of the left hand angle cleat. A value of zero uses a default depth of 0.6 times the depth of the supported left hand beam
The Flange Beam Left - Web Bolts area inputs control the parameters for the bolts between the angle cleat and the beam web.
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Number of Rows - displays the current set number of bolts rows. An input of zero gives a default number of bolts rows based on the bolt centres and angle cleat depth
Top Edge Distance - the distance from the top of the angle cleat to the centre of the top bolt row. A value of zero gives a default based on the bolt diameter
Vertical c/c - the current vertical bolt centres.
Back Mark - the distance from the web face to the first line of bolts
Stagg Mark - the distance from the web face to the staggered or second line of bolts
Bolts in pairs - shows the current setting for staggered or bolts in pairs. To set, select the row and use the drop down
To set staggered bolts, the Stagg Mark must be set to a non-zero value, along with the Bolts in Pairs row being set to Bolts staggered if 2 per row. An input of zero in the Stagg Mark row means only a single bolt column per angle cleat will be defined. To set two bolts per row, the position of the second bolt in the row is defined using the Stagg Mark and the Bolts in Pairs row is then set to
Bolts in pairs if 2 per row.
The Flange Beam Left - Toe bolts area provides inputs to define the bolts in the toe of the angle cleat for the left side beam which connects to the column flange.
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Number of Rows - displays the current number of bolt rows. An input of zero gives a default number of bolt rows. The number of bolt rows in input by selecting the row and inputting the required number
Top Edge Distance - the distance from the top of the angle cleat to the centre of the top bolt row. A zero input gives a default distance based on the bolt diameter
Vertical c/c - the centre to centre vertical spacing of the bolt rows. An input of zero gives a default spacing based on the bolt diameters
Horizontal c/c - the horizontal centre to centre spacing of the bolt columns. If a single angle cleat is used, the web to bolt column distance will be taken as half the input horizontal c/c distance
Where a right hand supported flange beam has been selected, the main property grid will include input areas to allow the definition and set-up for the right hand beam, cleats and bolts. The layout and functioning of these areas are as per the left hand beam and are, therefore omitted. For details, refer to the above section for the Flange Beam Left Plate, Section and Plate.
The Left and Right web beam inputs are the same as for the flange beams. For details of these inputs, refer to the above section for the Flange Beam Left - Angle Cleat, Web Bolts and Toe Bolts.
The Supporting Column area provides inputs to define the supporting column.
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Section - the currently selected column section and steel grade
Top of Column Projection - the top of the column relative to the setting out point.
To define the left column section and steel grade, the Section row can be expanded by clicking on the arrow to the left of the row. The layout of the Section area is shown below.
Steel Grade - display the currently selected steel grade
Section Type - shows the current section type. The default section is a UB
Section - displays the current section. The default is a 457x152UB67
Cell Depth - displays the overall depth for cellular or castellated beams. The default input is zero, meaning the section is based on the input Section only