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 |
---|---|---|
BEAM | 1.0 |
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. |
DFF | 0 |
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 | 1 |
Grade of Steel:
Refer to AASHTO LRFD, Table 6.4.1-1 |
KY | 1.0 | |
KZ | 1.0 | |
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. |
MAIN | 0.0 |
Flag for checking slenderness limit:
|
NSF | 1.0 |
Net Section Factor. Ratio of (Net Area)/(Gross Area) |
NSF | 1.0 | Net section factor for tension members. |
TRACK | 0 |
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. |