D1.D.2.3 AASHTO (LRFD) Design Parameters
The following table outlines the parameters that can be used with the AASHTO (LRFD) code along with the default values used if not explicitly specified.
|Parameter Name||Default Value||Description|
Identify where beam checks are performed:
|DMAX||1000||Maximum allowed section depth (in current length units) for a section to be selected with the SELECT command.|
|DMIN||0||Minimum allowed section depth (in current length units) for a section to be selected with the SELECT command.|
Deflection Length/Max allowable local deflection
If set to 0, (default) then no deflection check is performed.
|DJ1||Start joint of member||Joint No. denoting starting point for calculating Deflection Length.|
|DJ2||End joint of member||Joint No. denoting ending point for calculating Deflection Length.|
Grade of Steel:
Refer to AASHTO LRFD, Table 6.4.1-1
|LY||Member Length||Length to calculate slenderness ratio for buckling about the local Y axis.|
|LZ||Member Length||Same as above except in local z-axis.|
Flag for checking slenderness limit:
Net Section Factor.
Ratio of (Net Area)/(Gross Area)
|NSF||1.0||Net section factor for tension members.|
Level of detail in Output File:
|UNB||Member Length||Unsupported length of bottom flange. Used for calculating the moment of resistance when the bottom of beam is in compression.|
|UNT||Member Length||Unsupported length of top flange. Used for calculating the moment of resistance when top of beam is in compression.|