D4.C.3 Design Parameters
The following table contains the input parameters for specifying values of design variables and selection of design options.
| Parameter Name | Default Value | Description |
|---|---|---|
| CODE | - |
Must be specified S136. Design code to follow. See TR.48.1 Parameter Specifications. |
| BEAM | 1.0 | When this parameter is set to 1.0 (default), the adequacy of the member is determined by checking a total of 13 equally spaced locations along the length of the member. If the BEAM value is 0.0, the 13 location check is not conducted, and instead, checking is done only at the locations specified by the SECTION command (See STAAD manual for details). If neither the BEAM parameter nor any SECTION command is specified, STAAD will terminate the run and ask the user to provide one of those 2 commands. This rule is not enforced for TRUSS members. |
| CMZ | 1.0 | Coefficient of equivalent uniform bending w z. See CSA 136, 6.7.2. Used for Combined axial load and bending design. Values range from 0.4 to 1.0. |
| CMY | 0.0 | Coefficient of equivalent uniform bending w y. See CSA 136, 6.7.2. Used for Combined axial load and bending design. Values range from 0.4 to 1.0. |
| CWY | 0 |
Specifies whether the cold work of forming strengthening effect should be included in resistance computation. See CSA 136, 5.2.
|
| DMAX | 1000.0 | Maximum depth permissible for the section during member selection. This value must be provided in the current units. |
| DMIN | 0.0 | Minimum depth required for the section during member selection. This value must be provided in the current units. |
| FLX | 1 |
Specifies whether torsional-flexural buckling restraint is provided or is not necessary for the member. See CSA 136, 6.6.2
|
| FU | 450 MPa | Ultimate tensile strength of steel in current units. |
| FYLD | 350 MPa | Yield strength of steel in current units. |
| KT | 1.0 | Effective length factor for torsional buckling. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from torsional buckling) to any user specified large value. It is used to compute the KL/R ratio for twisting for determining the capacity in axial compression. |
| KY | 1.0 | Effective length factor for overall column buckling about the local Y-axis. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the capacity in axial compression. |
| KZ | 1.0 | Effective length factor for overall column buckling in the local Z-axis. It is a fraction and is unit-less. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the capacity in axial compression. |
| LT | Member length | Unbraced length for twisting. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from torsional buckling) to any user specified large value. It is used to compute the KL/R ratio for twisting for determining the capacity in axial compression. |
| LY | Member length | Effective length for overall column buckling in the local Y-axis. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the capacity in axial compression. |
| LZ | Member length | Effective length for overall column buckling in the local Z-axis. It is input in the current units of length. Values can range from 0.01 (for a column completely prevented from buckling) to any user specified large value. It is used to compute the KL/R ratio for determining the capacity in axial compression. |
| NSF | 1.0 | Net section factor for tension members, See CSA 136, 6.3.1. |
| STIFF | Member length | Spacing in the longitudinal direction of shear stiffeners for stiffened flat webs. It is input in the current units of length. See section CSA 136, 6.4.5 |
| TRACK | 0 |
This parameter is used to control the level of detail in which the design output is reported in the output file. The allowable values are:
|
| TSA | 1 |
Specifies whether bearing and intermediate transverse stiffeners satisfy the requirements of CSA 136, 6.5. If true, the program uses the more liberal set of interaction equations in 6.4.6.
|