CASA Space Frame 3D24.01 - App Store

Structural / Civil Engineering App for static & dynamic elastic analysis of general 3D space-frames.

With CASA SF-3D an engineer can create 3D structural models of space-frames and obtain both the numerical results and graphical representation of the deflections, forces, natural frequencies, and mode shapes. There is an emphasis on quick and precise modelling with graphical interaction. Results are graphically interactive with a sliding readout of numerical results at any point along a member.

More information about this App can be found in its integrated help and on our website. The App also contains "Replay Demonstrations" which describe and enact its use.
=== This App includes the following features:

* Linear static analysis.

* P-Delta non-linear static analysis.

* Natural mode dynamic analysis.

* Footfall dynamic analysis.

* Sway-cases.

* Geometry groups:
- Include or exclude geometry from the analysis.
- Groups can be combined into supergroups.

* Multi-copying for rapid generation of regular geometry.

* Rotation and reflection of geometry.

* Solid rendering of geometry:
- Member cross-sections drawn to scale.
- Colour-coded by groups.

* Viewpoint memories:
- Store and recall for quick navigation.

* Members can be oriented to a third node.

* Gravity (self-weight) loading.

* Factored load-case combinations.

* Rubber-band box for large-area selection.
=== General Technical Features ===

* Automatic analysis.

* Integrated extensive section library:
- British, European, American, Canadian, Australian, South African, Japanese, Russian.
- See our website for the range of shapes.

* Integrated section generator for common shapes:
- Open: I/H, channel, zed, angle, tee.
- Hollow: Oval, Rectangular.
- Solid: Oval, Rectangular.
- Calculates: Area, Inertia, Torsional constant, Elastic moduli, mass.

* Integrated material library:
- Steel, Aluminium, Concrete, Timber, Glass.
- User materials can be added.

* Member ends can be rigid or pinned.

* Loads applied as point, couple, trapezoid.

* Multiple load-cases.

* Statics results include:
- Reactions, deflections, bending moments, shear forces, bending stress.
- Points of interest.
- Results given all along members.

* Dynamic analysis considers self weight plus additional mass-cases.

* Dynamic results include:
- Resonant frequencies
- Undamped oscillation mode shapes

* Footfall results include:
- Response factors.
- Critical frequencies.
- Both impulse and resonant responses.

=== General User Interface Features ===

* Universal App - for iPhone, iPod touch, and iPad.

* Metric & imperial units.

* Four simple interactive screens:
- Geometry, Loading, Results: for interacting with the model.
- Utilities: Supplementary functions (see below).

* Easy modelling:
- Tap to select; tap to edit.
- Move and copy geometry.
- Slide nodes along members.
- Change member spans.
- Split members.
- Replicate loading across members.

* Graphical drag-and-tap controls:
- Rotate, pan, zoom the view with simple gestures.
- Drag nodes for positions.
- Drag loads for positions and magnitudes.
- Drag marker along member to read off results values.
- Tap on Points of Interest for important results.
- Select nodes to measure distances, angles, and areas between them.

* Numeric entry available:
- Double-tap on a datum to enter its numerical value.
- Includes a convenient built-in calculator.

* Straightforward section library:
- Pick from country, shape, and size.
- View diagram and properties.
- For custom shapes, double-tap on dimensions to edit.
- Axes can be rotated by 90 degrees.

* Report generation:
- Configurable content.
- Graphical layout.
- On-screen preview.
- Export PDF by e-mail.
- AirPrint.
- CSV export of numerical data.

* Supplementary functions:
- Document titles.
- Choice of unit system (UK/EU Metric, US Imperial).
- On-line help.
- Load, save, and export models.

Version History Maintenance update.
The app uses the standard iOS file browser, and we recommend saving any current documents and closing the app prior to updating. On first launch, if it opens in the "Recents" files tab, then browse to "On my iPad" and then to this app's documents. If the app were not fully closed prior to updating then the documents folder may appear empty when first opened, in which case close the app in the iOS home page and relaunch it. 24.01 01/30/2024 * Corrected colours in Dark Mode. 20.09 09/13/2020 * Fixes bug whereby CSV/PDF button disappears in report preview in iOS 13.

* Fixes bug that limited access to iCloud files. 20.06 06/17/2020 * Now uses the standard iOS document browser. This makes import/export easier and allows documents to be arranged in folders.

* Due to the significant changes in file handling, we recommend that you back up your documents before updating (e.g. via e-mail or iTunes). 19.10 11/06/2019 Added the option to select members that are of similar section and material to the master selected member. 18.05 05/24/2018 Improved compatibility with iOS 11 and iPhone X. 18.03 04/09/2018 Fixed indication of ambiguous major axis alignment. 3.17 03/06/2017 Updates for iOS 10.
Miscellaneous improvements. 3.16 01/04/2017 Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

Added colour-coded stress plots.
Miscellaneous improvements. 3.14 06/07/2016 * Graphically depicts most restraint types. (Others remain as circles.)

* Certain dimensions, areas, and angles are reported between nodes as they are selected.

* User interface speed improvements.

* Improved error reporting if analysis fails.

* Miscellaneous improvements. 3.10 03/17/2014 * Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

* Improved integration with iOS 7.

* Miscellaneous improvements. 3.07 10/23/2013 * Improved convergence in natural mode analysis.

* Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app. 3.06 07/01/2013 * Added footfall analysis. This determines the structure's impulse and resonance response to walking on stairs and floors.

* Some buttons can now be held down to obtain a choice over their behaviour. Such buttons have a small arrow indicator in their top-left corner.

* Members can be polarised either towards or away from the master node. Hold your finger on the Polarise button to be offered the choice.

* A choice of what to select/deselect within the selection box can be obtained by holding the relevant button.

* Fixed a bug whereby the mass-cases of natural modes were not being updated.

* Self-weight factors for natural modes are being phased out and should not be used for new models.

* Fixed naming error in section library: European "IPE 230" should have been "IPE 220".

* Miscellaneous improvements, including better support for iOS 6 and the iPhone 5.

* Now requires iOS 4.3 or higher.

* Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app. 3.05 05/31/2013 * Bug-fixes and miscellaneous improvements.

* Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app. 3.03 09/07/2012 * Natural mode dynamic analysis
- Resonant frequencies
- Undamped oscillation shapes
- Factored self-weight + additional mass-cases

* Super-groups, for combining multiple geometry groups.

* CSV export of numerical results.

* Miscellaneous improvements.

* Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app. 3.02 08/18/2012 * Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

* Added P-Delta (second-order) analysis. Simply set the P-Delta switch in a load case combination to have it analysed as such.

* Miscellaneous improvements. 3.01 07/23/2012 Rating 17+: The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

- Added multiple copying of geometry. When copying geometry, the calculator will open into which the number of copies can be entered. Moving or rotating multiply-copied geometry will cause the Nth copy to move N times the distance (or angle) of the first copy.

- Added sway-cases.

- Added title-blocks.

- Added geometry cover sheet option for reports.

- Added global worst-case highlights (in blue) on results.

- Section generator gives a meaningful name to custom sections: "depth x width x mass [shape]"

- Added Airprint of PDF reports (for those versions of iOS and devices which support it).

- Added Airprint of on-line help (for those versions of iOS and devices which support it).

- "R1", "R2" replaced by "Rf" and "Rm" in reports (force & moment).

- "D1", "D2" replaced by "Dt" and "Dr" in reports (translation and rotation).

- Miscellaneous improvements. 2.30 04/17/2012 - Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

- Added Canadian sections.

- Increased US imperial decimal places to 3 for force-per-unit-length, linear deflection, and bending stress. 2.29 01/26/2012 - Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

- Added warning message to user when trying to apply a load to a member which does not have a valid orientation.

- Report loadcase cover sheet now includes overall reaction, deflection, shear force, and bending moment diagrams.

- Report content is filtered by group.

- Loadcases can be renamed.

- Loadcases can be colour-coded.

- Miscellaneous improvements. 2.28 12/14/2011 * Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

* Fixed bug in solid rectangular section generator.

* Miscellaneous improvements. 2.27 12/01/2011 - Rating 17+. The app does NOT contain any objectionable content. The imposed rating is due to the price of the app.

- Added asymmetrical two-plate and three-plate sections in section generator.

- Added smaller American C sections, plus MC, S, and L sections.

- Miscellaneous improvements 2.26 11/24/2011 * Added "geometry groups":
- Nodes and members may optionally belong to a group.
- Each group may be marked for analysis or ignored.
- Each group may be colour-coded for ease of identification.
- Colours may be translucent, e.g. to depict glass.
- Groups marked as "ignore" will not contribute to the analysis nor to gravity loading; useful for geometry construction and annotation.

* Added solid rendering to the Geometry view:
- Members drawn to scale with their cross-sections.
- Lighting effects enhance clarity of 3D geometry.
- Colours and translucency according to geometry groups.
- Display individual groups with others ghosted.
- Confine select/deselect actions within displayed group.

* Added support for external monitors/projectors:
- The current geometry, loading, or results view is automatically presented to a connected external display.
- Useful for presentations and meetings.
- Requires suitable OS and hardware support.

* Added viewpoint memories:
- Quick store/recall of positions.
- Useful for working between overview and close-up details.

* Nodes/Members can be moved from one group to another.

* Loads can be moved from one load-case to another.

* Miscellaneous fixes and improvements. 2.25 10/20/2011 * Enhanced report (PDF) generation.

* Report preview.

* Built-in guided tour demonstration of report generator.

* Miscellaneous improvements. 2.24 08/13/2011 - Added South African section library.

- Improved replay demonstrations.

- Miscellaneous improvements. 2.23 07/19/2011 * Added automatic gravity loading (self-weight).

* Added Replay Tutorials - annotated re-enactmens of how to use the app with detailed explanations.

* Enhanced calculator - now includes trigonometry functions.

* Miscellaneous improvements. 2.22 04/25/2011