# A-Truss3D Pro — 3D Truss Structural Analysis

> Structural engineering app for space truss analysis using the Stiffness Matrix Method. (iPhone/iPad app by Jutarus Ratanasethakul.)

- Source: https://appshunter.io/ios/app/a-truss3d-pro/id1201673511 (this page in markdown: same URL + `.md`)
- Developer: [Jutarus Ratanasethakul](https://appshunter.io/developer/1454380236)
- Category: Productivity, Education
- Price: $9.99
- Age rating: 4+
- Requires: iOS 18.6 · 10 MB
- Languages: American English
- Released: 2017-02-15
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/a-truss3d-pro/id1201673511/reviews.md

## What is A?

A-Truss3D Pro is a structural analysis and visualization app for 3D truss systems. Create, edit, calculate, and review truss models directly on iPad with an interactive 3D canvas, engineering units, material properties, load cases, and direct stiffness method results.

Design trusses by defining nodes, members, supports, materials, and loads. Visualize geometry, member labels, load arrows, reactions, deformations, dimensions, and force states with clear 3D controls. Review calculated displacements, reactions, member forces, stiffness matrices, equilibrium checks, and summary reports in one workflow.

Key Features
• Interactive 3D truss and double-layer space truss modeling
• Node, member, material, load, and support editing
• Direct stiffness method calculation
• Member force results for tension, compression, and zero-force members
• Node displacement and reaction results
• Deformation visualization
• Stiffness matrix and equilibrium report views
• Custom unit templates and precision settings
• Sample truss catalog for quick starting points
• PDF report generation and preview
• Canvas display controls for labels, dimensions, loads, reactions, font, and scale

A-Truss3D Pro is built for engineering students, educators, and structural professionals who need a focused tool for creating and checking 3D truss behavior.

## Key features

- 3D graphics and UI
- Node displacements, member forces, and stress calculations
- Truss Assistant Creator for automatic generation
- Direct Stiffness Matrix solver
- Multiple viewing options (Proportion, Equal, Wireframe)
- PDF report generation
- Support for large space trusses

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/a-truss3d-pro/id1201673511/reviews.md

### 1/5 — Cannot enter any data

*2018-03-08*

Start up the app, and all I get is the drawing display.  I cannot enter any information.  It just ignores me if I tap one of the tabs at the bottom of the screen.  According to the App Store, it is supposed to work on this iPad.  

It does bring up the sample truss.  But I cannot get the Nodes, Members, etc., displays to come up with that truss either.

**Developer response:** It seems that you are working on landscape mode, just flip your device to portrait and everything will be fine.

## Frequently asked questions about A

### What is A-Truss 3D used for?

A-Truss 3D is a specialized application for structural engineers and students to analyze space trusses. It calculates node displacements, member axial forces, and stress using the Stiffness Matrix Method.

### How does A-Truss 3D help with complex trusses?

The Truss Assistant Creator in A-Truss 3D simplifies the input for large and complex trusses by automatically generating data from minimal information, reducing manual input errors.

### What kind of output does A-Truss 3D provide?

The app provides detailed calculation results, including node displacements, member axial forces, and stress. These results can be exported as PDF files for printing and sharing via email.

### Can A-Truss 3D handle very large truss models?

Yes, A-Truss 3D has been tested on older devices with large space trusses, such as one with 145 nodes and 512 members, without encountering issues.

### What are the viewing options in A-Truss 3D?

Users can view their truss models in three ways: Proportion (members drawn to scale), Equal (all members same size), and Wireframe (ideal for complex models).

### What is the price of A-Truss 3D?

A-Truss 3D is a paid application, available for $3.99.

### On which devices can I use A-Truss 3D?

A-Truss 3D is currently supported on iPads.

### How often is A-Truss 3D updated?

The latest version, 3.0, was released on May 27, 2025, indicating recent development and updates.

## Version history (last 5 releases)

### 4.2 — 2026-08-24

• Added Perspective and Orthographic projection modes for the 3D truss canvas.
• Added projection selection to Canvas Settings.
• Improved camera behavior for Top, Bottom, Left, Right, Front, and Back views.
• Plane views now allow normal orbit/rotate interaction after selection.

### 4.1 — 2026-08-14

Version 4.1 
∙ adds editable unit templates
∙ default material settings for new trusses
∙ member force status display
∙ and direct PDF report sharing
This update also improves PDF progress feedback and data migration safety.

### 4.0 — 2026-08-13

• A-Truss3D now rebrand to A-Truss3D Pro
• Added support for iPhone devices.
• Improved 3D truss canvas controls for labels, dimensions, loads, reactions, font style, and scale.
• Added proportional member rendering based on material area and elastic modulus.
• Added member force view modes to highlight tension, compression, and zero-force members.
• Enhanced double-layer space truss modeling and visualization.
• Improved deformation, equilibrium, stiffness matrix, and summary report views.
• Improved PDF report preview and section selection.
• Fixed report layout and calculation-result display issues.

### 3.0 — 2025-05-27

Improve UI and customize keypad for numeric data input.

### 2.0 — 2023-09-03

Bug fixes and improve overall performance.

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## More apps by Jutarus Ratanasethakul

- [A-Truss](https://appshunter.io/ios/app/a-truss/id412684176)
- [A-Beam HD](https://appshunter.io/ios/app/a-beam-hd/id433860996)
- [A-Truss HD](https://appshunter.io/ios/app/a-truss-hd/id447065368)
- [A-Beam+](https://appshunter.io/ios/app/a-beam-plus/id477748904)
- [A-Frame HD](https://appshunter.io/ios/app/a-frame-hd/id590637257)
- [AFrame Pro: Frame Analysis](https://appshunter.io/ios/app/aframe-pro-frame-analysis/id603996230)

All apps by Jutarus Ratanasethakul: https://appshunter.io/developer/1454380236

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*