File Formats: File Types
Description
Strand7 writes and/or reads a number of file types.
Model Files
| Extension | Type | Description | Reads | Writes |
|
.ST7 |
Binary |
The Strand7 model data. This is the only file that is essential to archive; other files can be recreated from this file. |
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.ST7V |
Binary |
A view-only version of the Strand7 model data (see Saving: Save View-only Copy). | • | • |
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.BXS |
Binary |
User-defined beam cross section file (see Utility: Make BXS). |
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.LCF |
Text |
Load case factors file (see CASES: Combination Cases and SOLVERS: Load (Nonlinear Static)). |
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.EQ7 |
Text |
User-defined equations for beam, plate and brick result contours (see Results: Element Results Equations). |
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Options Files
| Extension | Type | Description | Reads | Writes |
|
.CFG3 |
Binary |
Display options used to initialise newly created model files (see Preferences: Folder Locations). |
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|
.MAP |
Text |
Colour map file used to assign default colours to property numbers (see Preferences: Folder Locations). |
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|
.INI |
Text |
Strand7 default options and model file history. It is stored in the Strand7 sub-folder of the user's folder (e.g., "C:\Users\[USERNAME]\Strand7[VERSION NUMBER]"). |
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Solver Result Files
| Extension | Type | Description | Reads | Writes |
|
.LSA |
Binary |
Linear static results (see SOLVERS: Linear Static Settings and SOLVERS: Files). |
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.LBA |
Binary |
Linear buckling results (see SOLVERS: Linear Buckling Settings and SOLVERS: Files). |
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|
.LIA |
Binary |
Load influence results (see SOLVERS: Load Influence Settings and SOLVERS: Files). |
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|
.NLA |
Binary |
Nonlinear static results (see SOLVERS: Nonlinear Static Settings and SOLVERS: Files). |
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.QSA |
Binary |
Quasi-static results (see SOLVERS: Quasi-static Settings and SOLVERS: Files). |
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|
.NFA |
Binary |
Natural frequency results (see SOLVERS: Natural Frequency Settings and SOLVERS: Files). |
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|
.HRA |
Binary |
Harmonic response results (see SOLVERS: Harmonic Response Settings and SOLVERS: Files). |
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.SRA |
Binary |
Spectral response results (see SOLVERS: Spectral Response Settings and SOLVERS: Files). |
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.LTA |
Binary |
Linear transient dynamic results (see SOLVERS: Linear Transient Dynamic Settings and SOLVERS: Files). |
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.NTA |
Binary |
Nonlinear transient dynamic results (see SOLVERS: Nonlinear Transient Dynamic Settings and SOLVERS: Files). |
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|
.SHA |
Binary |
Steady state heat results (see SOLVERS: Steady Heat Settings and SOLVERS: Files). |
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|
.THA |
Binary |
Transient heat results (see SOLVERS: Transient Heat Settings and SOLVERS: Files). |
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|
.ISA |
Binary |
In-situ stress results (see Utility: Soil In-situ). |
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|
.LSC |
Binary |
Linear static combination file optionally created by the solver (see SOLVERS: Load (Linear Static and Load Influence)) or by the post processor when closing result files with combination cases (see CASES: Combination Cases). |
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Solver Log Files
| Extension | Type | Description | Reads | Writes |
|
.LSL |
Text |
Linear static analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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.LBL |
Text |
Linear buckling analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.LIL |
Text |
Load influence analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.NLL |
Text |
Nonlinear static analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.QSL |
Text |
Quasi-static analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.NFL |
Text |
Natural frequency analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.HRL |
Text |
Harmonic response analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.SRL |
Text |
Spectral response analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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.LTL |
Text |
Linear transient dynamic analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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|
.NTL |
Text |
Nonlinear transient dynamic analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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.SHL |
Text |
Steady state heat analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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.THL |
Text |
Transient heat analysis log (see SOLVERS: Files and View Log File: Log File Viewer). |
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.ISL |
Text |
In-situ stress analysis log (see View Log File: Log File Viewer). |
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Solver Restart Files
| Extension | Type | Description | Reads | Writes |
|
.SRF |
Binary |
Optionally created by the Nonlinear Static solver (see Special Topics: Solution Restart). It is used for restarting a previous nonlinear static analysis or for executing a linear buckling, quasi-static or nonlinear transient dynamic analysis with initial conditions from the nonlinear static analysis. |
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.DRF |
Binary |
Optionally created by the Nonlinear Transient Dynamic solver (see Special Topics: Solution Restart). It is used only for restarting a previous nonlinear transient dynamic analysis. |
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.QRF |
Binary |
Optionally created by the Quasi-static solver (see Special Topics: Solution Restart). It is used for restarting a previous quasi-static analysis or for executing a linear buckling analysis with initial conditions from the quasi-static analysis. |
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Import/Export Files
| Extension | Type | Description | Reads | Writes |
|
.TXT |
Text |
Various types of data are imported/exported via text files with the .TXT extension, including Import: Strand7 Text File, Export: Strand7 Text File and LAYOUTS: Tables. |
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| .NAS, .DAT | Text | NASTRAN FEA model data file (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
| .CDB, .DAT | Text | ANSYS FEA model and geometry data file (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
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.S2K, .$2K |
Text |
SAP2000 FEA model data file (see Strand7 Menu: Import and Strand7 Menu: Export). |
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.STD |
Text |
STAAD-PRO FEA model data file (see Strand7 Menu: Import and Strand7 Menu: Export). |
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| .IGS, .IGES | Text | IGES file containing surface and solid geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
| .SAT | Text | ACIS file containing surface and solid geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | |
| .STP, .STEP | Text | STEP file containing surface and solid geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
| .DXF | Text | AUTOCAD file containing wireframe, surface and solid geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
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.3DM |
Binary |
RHINO file containing wireframe, surface and solid geometry (see Strand7 Menu: Import and Strand7 Menu: Export). |
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.STL |
Text |
Stereo lithography file containing triangulations of surface geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
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.STB |
Binary | Stereo lithography file containing triangulations of surface geometry (see Strand7 Menu: Import and Strand7 Menu: Export). | • | • |
Other Log Files
| Extension | Type | Description | Reads | Writes |
|
.LOG |
Text |
Import, export and automeshing operations may generate a log file containing warning and other messages based on the outcome of the operation (see View Log File: Log File Viewer). |
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Image Files
| Extension | Type | Description | Reads | Writes |
|
.BMP, .JPG, .JPEG, .PNG |
Binary |
Strand7 will produce all of these image file types (see Base Panel: Copy Graphics, Strand7 Menu: Print Preview, Results Graphs: 2D Graph Tab). Strand7 will also read these file types for use as the background in the graphics display (see View Settings: Background Tab) and for the logo in the header of a printed page (see Print Preview Formatting Options: Header and Footer). |
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Animation Files
| Extension | Type | Description | Reads | Writes |
|
.SAF3 |
Binary |
See Results: Animate. |
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|
.SAF |
Binary |
Animation file produced by previous versions of Strand7. |
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Library Data Files
| Extension | Type | Description | Reads | Writes |
|
.BGL |
Binary |
Beam geometry library for detailed cross section definitions (see Utility: Make Library and Properties: Import/Export Beam Sections). |
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.BSL |
Binary |
Beam section library for simplified cross section definitions (see SOLVERS: Files and Properties: Import/Export Beam Sections). |
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|
.CML |
Binary |
Library of composite materials for ply definition (see SOLVERS: Files and Plies: Import/Export Ply Data). |
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.CRL |
Binary |
Library of creep data (see Creep: Import/Export Creep Layout Data). |
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.MAT |
Binary |
Library of linear elastic material data (see SOLVERS: Files and Properties: Import/Export Materials). |
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.MLT |
Binary |
Library of moving load templates (see Paths: Import/Export Load Path Template Data). |
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.REO |
Binary |
Library of plate reinforcement layouts (see Plate RC: Import/Export RC Layout Data). |
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.SSD |
Binary |
Library of section properties for importing STAAD files (see STAAD File: Beam Section Shapes). |
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Temporary Files
| Extension | Type | Description | Reads | Writes |
|
.TMP, .~?? |
Binary |
These files are used by both the graphical user interface and the solvers. They are normally stored in the "TMP" sub-folder of the Strand7 directory in the user's folder, although the location can be set by the user (see Preferences: Folder Locations). The file names begin with the tilde (~) character. They are normally deleted at the conclusion of the Strand7 session or solver run. File names that begin with ~BAT are solver batch run control files (see SOLVERS: Batch Solver). |
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See Also