TR.19.8 General
The following cross-sectional properties should be used for this section-type. This facility allows you to specify a built-up or unconventional steel section. Provide both the Y and Z parameters for design or code checking.
Note: STAAD.Pro can perform some code checks on a General
section where as a Prismatic section (TR.20.2 Prismatic Property Specification) is for analysis only.
property-spec = AX D TD B TB IZ IY IX SZ SY AY AZ PZ PY HSS DEE
- AX
- Cross section area
- D
- Depth of the section
- TD
- Thickness associated with section element parallel to depth (usually web). To be used to check depth/thickness ratio
- B
- Width of the section
- TB
- Thickness associated with section element parallel to flange. To be used to check width/thickness ratio
- IZ
- Moment of inertia about local z-axis (usually strong axis)
- IY
- Moment of inertia about local y-axis
- IX
- Torsional constant
- SZ
- Section modulus about local z-axis
- SY
- Section modulus about local y-axis
- AY
- Shear area in local y-axis.
- AZ
- Shear area in local z-axis.
- PZ
- Plastic modulus about local z-axis
- PY
- Plastic modulus about local y-axis
- HSS
- Warping constant for lateral torsional buckling calculations
- DEE
- Depth of web. For rolled sections, distance between fillets should be provided
Note: Properties
PZ,
PY,
HSS, and
DEE must be provided for code checking or member
selection per plastic and limit state based codes (AISC LRFD, British, French,
German and Scandinavian codes). For codes based on allowable stress design
(AISC-ASD, AASHTO, Indian codes), zero values may be provided for these
properties.
You can also specify points to define a general section. Refer to TR.19 User Steel Table Specification for details. When this method is used, the section property-spec values can be calculated automatically by the graphical interface.