ASD/LRFD Manual - American Wood Council

74 M10: MECHANICAL CONNECTIONS
9. When both beams and columns are continuous and the
connection must remain in-plane, either the beam or the
column must be spliced at the connection. In this detail the
column continuity is maintained. Optional shear plates may
be used to transfer higher loads. Note that, unless the bolt
heads are completely recessed into the back of the bracket,
the beam end will likely require slotting. In a building with
many bays, it may be difficult to maintain dimensions in
the beam direction when using this connection.
11A. Similar to details 1 and 2.
11B. Alternate to detail 11A.
Group 3. Column to Base Connections
Design concepts. Since this is the bottom of the structure,
it is conceivable that moisture from some source
might run down the column. Experience has shown that
base plate details in which a steel “shoe” is present can
collect moisture that leads to decay in the column.
12. Similar to detail 3.
10. Similar to detail 4, with a bearing plate added.
Group 4. Beam to Beam Connections
Design concepts. Many variations of this type of connection
are possible. When all members are flat and their
tops are flush, the connection is fairly straightforward.
Slopes and skews require special attention to fabrication
dimensions – well-designed connections provide adequate
clearance to insert bolts or other connectors and also provide
room to grip and tighten with a wrench. Especially for
sloped members, special attention is required to visualize
the stresses induced as the members deflect under load
– some connections will induce large perpendicular to
grain stresses in this mode.
American Wood Council