Figure 3-10.Girder span on pipe columns.
Figure 3-11.Built-up column section.
such that the joints or splices are 1 1/2 to 2 feet above
the second and succeeding story levels. This will
ensure that the splice connections are situated well
above the girder or beam connections so that they do
not interfere with other second story work.
Column splices are joined together by splice
plates which are bolted, riveted, or welded to the
column flanges, or in special cases, to the webs as well.
If the members are the same size, it is common practice
to butt one end directly to the other and fasten the
splice plates over the joint, as illustrated in
figure 3-12. When the column size is reduced at the
joint, a plate is used between the two ends to provide
bearing, and filler plates are used between the splice
plates and the smaller column flanges (fig. 3-13).
Girders are the primary horizontal members of a
steel frame structure. They span from column to
Figure 3-12.Column splice with no size change.
Figure 3-13.Column splice with change in column size.
column and are usually connected on top of the
columns with CAP PLATES (bearing connections), as
shown in figure 3-14. An alternate method is the
seated connection (fig. 3-15). The girder is attached to
the flange of the column using angles, with one leg
extended along the girder flange and the other against
the column. The function of the girders is to support
the intermediate floor beams.