IS 800-07 Column Design
This output contains a complete description of individual column designs per the IS 800-07 specifications. Column size, yield strength, orientation, axial loads, moments, stresses, and interaction equation results are all included in this output.
Page Heading
The heading contains information about RAM Steel Column and the model that the output represents. It lists the current version of RAM Steel Column being used, the title of the output, the database name including the date and time it was created or last modified and the building and steel codes that were utilized in the design process. It may also include the licensee Company name and a project description.
Story Information
- Story Level
- This is the level above which this column occurs.
- Column Line Grid Label
- This is the column line grid label. It represents the top co-ordinate or grid location of the top column and top co-ordinate or grid location of the bottom column in a column line. If the top columns top coordinates and bottom columns top coordinates are the same then only one is listed in the label.
- Fy
- This is the user selected yield strength for the column.
- Column Size
- This is the designed column size. It is either the optimum size selected by the RAM Steel Column module or the user selected size.
- Orientation
- This is the orientation, in degrees, of the column web with respect to the global X axis. For example, if the web is parallel to the X axis, the orientation angle is 0.0 degrees; if the web is perpendicular to the X axis, the orientation is 90.0 degrees.
Input Design Parameters
These parameters were calculated based on the geometry of the model.
| Setting | Description |
|---|---|
| Lu | These are the unbraced lengths with respect to the X and Y axes used in design. |
| K | These are the effective length factors. K will be 1.0 for a column braced at both ends; it will be 2.0 for a "flag pole" column (unbraced at the top of the column). |
| Braced Against Joist Translation | The RAM Steel Column Design module assumes that all gravity columns are braced against joint translation. |
| Column Eccentricity | These are the eccentricities of the beam column connections. They are based on the user specified criteria, and are used to calculate the unbalanced moment. |
Controlling Column Loads
| Setting | Description |
|---|---|
| Load Case | This is the Load Case which resulted in the worst combination of axial loads and bending moments. See Technical Notes for a description of the load cases. |
| Axial (P or N) | These indicate the total unfactored Dead and Live Loads associated with the controlling load case. The Live Load is reduced, if allowed. The Live Load may be less than the total Live Load due to skipping associated with the controlling load case. |
| Moments | These indicate the total unfactored Dead and Live load moments associated with the controlling load case. |
| Shear | These indicates the total unfactored Dead and Live load shear associated with the controlling load case. The shear is calculated as the sum of the end moments on the column divided by the column length. |
Calculated Parameters
The calculated parameters include the section class for the column, the Fy used for design and the design loads for the load combination that controls.
Section Capacity
This section contains the member cross-section capacities not considering buckling. Several interaction or design checks are performed per the IS 800-07 specification. The results of the interaction equations are listed along with the Formula reference. The Code limits the value to 1.0. The nomenclature of the variables is that used in the IS 800-07 Specification.
Member Capacity
This section contains the member cross-section capacities considering buckling. A number of interaction or design checks are performed per the IS 800-07 specification. The results of the interaction equations are listed along with the Formula reference. The Code limits the value to 1.0. The nomenclature of the variables is that used in the IS 800-07 Specification.