Fixed Column Base Plate Design

Additional plates on the column and anchor rods required.

Fixed column base plate design.

Case a is a l ad case with axial c mpressi n and shear. Where ƒ ck characteristic strength of concrete. Aisc home american institute of steel construction. Flat plates stress deflection equations and calculators.

A factored load on the column design bearing strength of concrete. The plan dimensions of the slab base plate may now be selected to provide the above area and also so that the projections a and b beyond the rectangle circumscribing the column area nearly equal fig. The bolts are cast into the concrete base in location tubes or cones and are fitted with anchor plates to prevent pull out. Typically fixed base columns are recessed below finished floor.

Construction of portal frames. Frames with pinned bases are heavier than those having fixity at the bases. The graphic of the fixed base column to the left is just an example of what the. 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.

Base plate tensi n interface cantilever parallel t m ment directi n in. Connections and element design apex connection column base bracing connection eaves connections purlins. Of the column base plate connection in the elastic and plastic ranges and for seismic loading possibly even the cyclic force deformation relations. The base plate this will result in less labor to fabricate and will result in a more economic design.

Many of the stress and deflection equations and calculators referenced from. 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. However frames with fixed base may require a more expensive foundation. 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.

Engineering calculators menu engineering analysis menu. 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. 3 22 c lumn flange thickness in. Beam column base plate design.