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
- Largest dimension parallel to the local Y axis (overall section depth along Y).
- TD
- Thickness associated with section element parallel to Y axis (taken to be the web). To be used to check depth/thickness ratio of the web.
- B
- Largest dimension parallel to the local Z axis (overall section width along Z).
- TB
- Thickness associated with section element parallel to Z axis (taken to be the flanges). To be used to check width/thickness ratio of the flanges.
- IZ
- Moment of inertia about local z axis
- IY
- Moment of inertia about local y axis
- IX
- Torsional constant
- SZ
- Section modulus about local z axis (about the local y-axis for Z up)
- SY
- Section modulus about local y axis (about the local z axis for Z up)
- AY
- Shear area in local y-axis (about the local z axis for Z up)
- AZ
- Shear area in local z axis (about the local y-axis for Z up)
- PZ
- Plastic modulus about local z axis (about the local y-axis for Z up)
- PY
- Plastic modulus about local y axis (about the local z axis for Z up)
- HSS
- Warping constant for lateral torsional buckling calculations
- DEE
- Depth of web between the flanges. 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.
As an alternative to specifying overall dimensions and 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.