Pinned Base

A Column Base that is designed to resist Horizontal and Vertical movement. Rotation is to be taken out in the foundation.

Fixed Base

A Column Base that is designed to resist Horizontal and Vertical movement as well as rotation.

Moment at Top:

Moment at Top - Resisting

Moment at top of members will resist rotation.

Moment at Top - Released

The Connection between the Column and Rafter does not resist Moment; it acts just like a hinge.

Top:

Top - Standard

There is no horizontal boundary support point at the top of the column.

Top – Horizontal Restraint

Adds a horizontal boundary support point at the top of the column.

Top – Vertical Restraint

Adds a vertical boundary support point at the top of the column.

Displacement for Column Base:

Displacement for Column Base - X

This field is used for the Horizontal dimension of the Displacement of the Column Base. This can be a negative or positive direction and is either in 0/0/0 or Metric.

When looking at the sign convention when in frame elevation view (+) X is to the right.

Displacement for Column Base - Y

This field is used for the Vertical dimension of the Displacement of the Column Base. This can be a negative or positive direction and is either in 0/0/0 or Metric.

When looking at the sign convention when in frame elevation view (+) Y is up.

Displacement for Column Base - Rotation

The input field is inactive. This field is used for the angle of the Displacement, in Radians, of the Column Foundation. This is only applied for Fixed Base conditions.

Warning (Design):

2^nd order analysis must be disabled (OFF) on the Loading – Loads and Codes – Building Code tab when a column base displacement is specified for either the X or Y direction.

Override:

H/T

Defined as the depth of member divided by the web thickness.

Cmx

Defined as the reduction factors used in combined bending and axial equations, in the strong axis of the member. Any user input will override the system value.

Cmy

Defined as the reduction factors used in combined bending and axial equations, in the weak axis of the member. Any user input will override the system value.

Lx

Defined as the effective length used in calculations of allowable axial loads, in the strong axis of the member. Any user input will override the system value.

Ly

Defined as the effective length used in calculations of allowable axial loads, in the weak axis of the member. Any user input will override the system value.

Lb

Defined as the un-braced length used in calculations of allowable bending stress. Any user input will override the system value.

Standard Controls:

§ OK, Cancel, Apply, Help

See also:

§ Frames - Segment Information