Column Moments
With
, you can specify the portion of the calculated Gravity load moments to be included in the design of the columns. Percentages for Dead Load, Live Load and Roof Load may be specified individually. For the Live and Roof Loads, this reduction is in addition to any Live Load Reduction calculated for the column. The purpose of this command is to reduce or eliminate the Gravity load moments on the columns. This feature should be used cautiously, as it causes the program to ignore portions of the calculated moments. This does not have any impact on the axial load in the column, and it does not have any impact on the beam design forces. Normally the percentages should be specified as 100% to include the full-calculated moments.One application of this command is when the so-called "Type 2 connection" or "Wind connection" design methodology is being employed, wherein it is assumed that the beam-to-column connection acts as a moment connection under wind loads, but acts as a pinned connection under gravity loads. It allows the user to specify that the Gravity load moments on the column be ignored, while considering the full design axial forces. This command has no impact on Wind or Seismic moments and axial forces. The beam design moments are not affected by this command; beams must be investigated as necessary.
This command only impacts the calculation of the design moments when performing a Code Check on the column in Standard Provision mode. It does not impact the values shown for the Member Forces listed in any reports elsewhere in the program.