Page 160 - Handbook of Structural Steel Connection Design and Details

Design of Connections for Axial, Moment, and Shear Forces

Design of Connections for Axial, Moment, and Shear Forces 145

2.4.4 Seated connections
The second type of shear connection is the seated connection, either
unstiffened or stiffened (Fig. 2.51). As with the framed connections,
there are tables in the Manual of Steel Construction, which aid in the
design of these connections.
The primary use for this connection is for beams framing to column
webs. In this case, the seat is inside the flange or nearly so, and is not
an architectural problem. It also avoids the erection safety problems
associated with most framed connections where the same bolts support
beams on both sides of the column web.
When a seat is attached to one side of the column web, the column web
is subjected to a local bending pattern because the load from the beam
is applied to the seat at some distance, e, from the face of the web. For
stiffened seats, this problem was addresses by Sputo and Ellifrit (1991).
The stiffened seat design tables (Tables 10-7 and 10-8) in the AISC
13th Edition Manual of Steel Construction reflect the results of their

Figure 2.51 Standardized weld seat connections: (a) unstiffened seat and
(b) stiffened seat.

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