In this example, we show an all-welded medium girder truss. It may be formed from either single or double (battened) channels.
For all-welded trusses formed using angles, the work points may be established from the centroids or centers of the members.
End Support Options
Below are some examples of typical truss support options:
The following typical examples assume the truss has been formed from single channels. In this event, the heel of the channel (top and bottom chords) should ideally be set out at the center-line of the support, which may be either a column or beam. Should double (battened) channels be used, the truss should be set-out at the center-line of the truss.
Detail -A- illustrates a typical seating connection with a shoe-plate welded to the bottom chord of the truss. The shoe-plate size and drill pattern for the bolts should align with the means of support.
Detail -B- shows a typical top chord seat. The leg length (d) should be such as to allow clearance for the diagonal lacing member - this will depend on how the truss will be supported i.e on a column cap or horizontal beam.
As with Detail -A- the shoe-plate size and drill pattern for the bolts should align with the means of support.
Detail -C- shows a typical end-plate connection connecting to a column or another truss.
The heel of the channel chord should align with the center of the column and the bolt-hole gauge should be in accordance with the recommended or 'workable' gauge of the column.
Detail -D- illustrates a fairly typical connection to a column. The vertical truss member runs the full depth of the truss and will work for almost any truss configuration (see Introduction).
As with the precious detail, the heel of the chanell chord should align with the center of the column and the bolt-hole gauge should conform to the recommended or 'workable' gauge of the column
Detail -E- shows a typical connection for a cantilevered truss. A simple shoe-plate is welded to the underside of the bottom chord which should align with the vertical truss member.