Free Online Frame Analysis Software
Analyse portal frames, rigid frames, and multi-storey structures with our free structural analysis tool. Full 2D and 3D capability with P-Delta (second-order) effects—no signup or download required.
Frame Types You Can Analyse
AutoCalcs handles all common frame configurations used in structural engineering. From simple portal frames to complex multi-storey buildings, get accurate results using finite element analysis.
Frame Configurations
- Portal frames (single & multi-bay)
- Multi-storey rigid frames
- Moment-resisting frames
- Braced frames
Analysis Types
- Linear static analysis
- P-Delta (2nd order) effects
- Sway analysis
- Multiple load combinations
Results
- Bending moment diagrams
- Shear force diagrams
- Axial force diagrams
- Deflected shape & sway
Modelling Features
- Pin & fixed connections
- Member end releases
- Real section library
- Copy & extrude tools
2D and 3D Frame Analysis
While many online calculators only handle simple 2D frames, AutoCalcs gives you full 3D capability. Model frames in any orientation, apply loads in any direction, and capture true structural behaviour including out-of-plane effects.
For 2D analysis, simply work in a single plane—the tool handles both cases seamlessly.
P-Delta Analysis for Frames
Second-order (P-Delta) effects are critical for frames, especially tall or slender structures. AutoCalcs includes P-Delta analysis to capture the additional moments and forces caused by gravity loads acting on the deflected shape.
This is essential for realistic frame design and is included free—no premium tier required.
Why Choose AutoCalcs for Frame Analysis?
- Truly free — Full analysis capabilities with no paywalls
- No signup required — Start analysing immediately
- Professional accuracy — FEA-based solver using the Direct Stiffness Method
- P-Delta included — Second-order effects at no extra cost
- Access anywhere — Not tied to one computer, just open the web app