Click any node or member on the canvas to inspect its properties
✏ Edit Section
Auto: ≤20°=Beam · ≥70°=Column · else=Brace
Δ P-Delta Analysis — Active2nd Order
⚠ P-Delta (geometric nonlinearity) is enabled
• Solver iterates to include P-Δ amplification of moments
• Results include 2nd-order effects from axial force × lateral displacement
• Required for slender structures and high axial loads (ASCE 7 §12.8.7)
• Re-Solve after toggling to apply to current loads
Export your complete project data as a JSON file for safe keeping outside the browser.
Use this before clearing browser data or switching devices.
Import & Restore
Import a backup JSON file to restore all saved projects, or load a .frame file.
Auto-Backup
Browser will prompt to download a .json backup when you close or refresh the tab.
Danger Zone
⚠ These actions cannot be undone.
Unit System
Choose the unit system for all values displayed in the canvas, tables and results.
Internal solver always works in SI (kN, m) — values are converted for display only.
Values are magnitudes — direction is downward (gravity)
Section & Material
Select a section above to see its properties
Preview
Keyboard Shortcuts
W SelectD Place NodeE Draw BeamH Set SupportB HingeC LoadA SectionM SettlementG DeleteI SolveV ViewsU FilesO SettingsEsc Back to SelectCtrl+Z UndoCtrl+Y RedoDel Delete sel.Alt+D Dark ModeCtrl+A Select allF Fit to screen? ShortcutsR Reset 3D orbit↑↓←→ Nudge nodeShift+drag Multi-selectCtrl+K Command searchTab Cycle dialog fields
Canvas: scroll=zoom, middle/alt-drag=pan, right-drag=orbit in 3D / pan in 2D