283757893275

Structural Steel Frames 301
Cap plate
welded to
lower
column
Plate welded
to top column
and bolted to
cap plate
Main
beam
Figure 5.23 Column to column connection.
Packing plate
Universal
column
Splice plate
bolted to top
column and
welded to lower
column
Plate welded
to top of
lower column
Universal
column
Figure 5.24 Small to larger column connection.
splice plates, packing pieces and flanges of the upper column, as illustrated in Figure 5.24.
It is also common to splice columns together using a bolted connection as shown in Figure
5.25 and Photograph 5.9. Where for design purposes a column is required to take its
bearing on a main beam, a simple connection will suffice. A bearing plate is welded to the
machined end of the column, ready for bolting to the top flange of the main beam, as
illustrated in Figure 5.26a. Where a secondary beam is required to take a bearing from a
main beam, as for example, where a floor is trimmed for a stair well, the end of the secondary
beam is notched to fit under and around the top flange of the main beam. The connection
is made with angle cleats bolted each side of the web of the secondary beam and to
the web of the main beam as illustrated in Figure 5.26b.