This free online roof truss calculator is a truss design tool that generates the axial forces, reactions of completely customizable 2D truss structures. It has a wide range of applications including being used as a wood truss calculator, roof truss calculator, floor joist calculator, scissor truss calculator or roof framing.
Vendor
SkyCiv
Company Website
SkyCiv Roof Truss Calculator is a free, cloud-based structural analysis tool designed to calculate axial forces and reactions in 2D truss structures. It supports a wide range of applications including wood truss design, roof framing, floor joists, scissor trusses, and steel bridge trusses. The tool allows users to build custom truss models by adding nodes, members, and supports, and applying up to five point loads. With a clean graphical interface and fast solver, it delivers accurate results for internal member forces and support reactions. Engineers can upgrade to the full version for advanced features such as distributed loads, unlimited supports and members, hand calculations using method of joints and sections, and integration with design codes like AISC, ACI, Eurocode, AS, CSA, and NDS. Features
- Model Setup:
- Add nodes, members, and supports.
- Apply up to 5 point loads (distributed loads in full version).
- Customize units and display settings.
- Analysis Outputs:
- Axial forces in truss members.
- Support reactions.
- Graphical display of results (Reactions, Axial Force).
- Advanced Capabilities (Full Version):
- Unlimited loads, supports, hinges, and members.
- Step-by-step hand calculations using method of joints and sections.
- Material selection (wood, steel).
- Design code integration: AISC, ACI, Eurocode, AS, CSA, NDS.
- Solver Technology:
- Finite Element Analysis (FEA) solver.
- Splits members into 10 elements for accurate force calculations.
- Handles large structures with over 10,000 members.
- Integration with SkyCiv Structural 3D:
- Access bending moment and shear force diagrams.
- Model in 3D with area loads, distributed loads, and self-weight.
Benefits
- Accessibility: Free and fully online—no installation required.
- Speed: Fast setup and instant results.
- Accuracy: Reliable FEA-based calculations.
- Scalability: Upgrade for complex projects and full design workflows.
- Visualization: Clean graphical output for easy interpretation.
- Versatility: Suitable for various truss types—Pratt, Warren, Howe, etc.
- Integration: Seamless transition to SkyCiv Structural 3D for advanced modeling.