Fixed Column Base Plate Design

The base plate this will result in less labor to fabricate and will result in a more economic design.

Fixed column base plate design. Design of column base plates typical column bases as shown below consist of a single plate fillet welded to the end of the column and attached to the foundation with four holding down bolts. Design bearing strength of concrete 0 45 ƒ ck. Additional plates on the column and anchor rods required. Typically fixed base columns are recessed below finished floor.

The follow web pages contain engineering design calculators that will determine the amount of deflection and stress a flat plate of known thickness will deflect under the specified load and distribution. Adding stiffeners and other plates to a base plate assembly is labor intensive compared to using a thicker base plate that could eliminate the need for these additional stiffener plates. Frames with pinned bases are heavier than those having fixity at the bases. Where ƒ ck characteristic strength of concrete.

Of the column base plate connection in the elastic and plastic ranges and for seismic loading possibly even the cyclic force deformation relations. However frames with fixed base may require a more expensive foundation. A factored load on the column design bearing strength of concrete. Construction of portal frames.

The pr gressi n f beam c lumn l adings in rder f in creasing m ments is presented in f ur l ad cases. The forces and deformations from the structural analyses used to design the column base plate connection are dependent on the choice of the column base plate connection details. The graphic of the fixed base column to the left is just an example of what the. Case a is a l ad case with axial c mpressi n and shear.

Many of the stress and deflection equations and calculators referenced from. Fixed base columns must also be straight columns and are typically deeper at its base in comparison to pinned base. Aisc home american institute of steel construction. Beam column base plate design.

3 22 c lumn flange thickness in. Flat plates stress deflection equations and calculators. Connections and element design apex connection column base bracing connection eaves connections purlins. Base plate tensi n interface cantilever parallel t m ment directi n in.