1 SPMT Configuration

Configure an SPMT transport from a cargo list and a saddle layout. RoadMind selects the optimal combination of modules from your fleet database, distributes the axle lines between the saddles, and checks every relevant limit:

• Module selection – from your SQLite fleet database, with manufacturer geometry (Scheuerle, KAMAG, Goldhofer, Cometto, Nicolas)
• Support type – 3-point or 4-point suspension
• Grade 1 / Grade 2 – per ALE Engineering Guidelines and ESTA best practice
• Axle load – average, per saddle, per axle, with automatic distribution
• Ground pressure – contact area and t/m² limit
• Stability – tip angle in both axes, with the ESTA slope reserve always included
• Wind envelope – maximum allowable wind speed per axis

The 3D model is generated directly in FreeCAD from the calculated configuration — modules, saddles, cargo, orientation markers, all in the correct coordinate system.

Video: Creating an SPMT transport – module selection, 3D generation, stability check

2 Stability & Reactions

The stability solver evaluates all relevant load cases — static, braking, curve, slope, and wind — with signed accelerations, not absolute values. This catches the worst case in each direction:

• Signed load cases – static, brake, slope up/down, curve left/right, wind lateral/longitudinal
• Tipping check – suspension polygon for 3-point and 4-point, with tip angle per axis
• Overall system tipping – separate check for the combined cargo + SPMT centre of gravity
• Reaction forces – per suspension point, for every signed load case
• Self-check – numerical reactions are verified against the analytical moment balance
• Wind envelope – the wind speed at which the setup is still fully valid, not just the point where margin disappears

All results feed directly into the PDF report and the TechDraw drawing.

3 Lashing & Securing

The lashing editor lets you design the securing arrangement directly on the 3D model. Place lash points on the SPMT and the cargo, connect them, and RoadMind calculates the forces:

• Lash point editor – click to place SPMT and cargo attachment points, with allowable load per point
• Lashing types – chain, SpanSet, custom, with LC in daN and kN
• Angles – vertical and horizontal, derived from the 3D geometry
• Force components – Fx, Fy, Fz, restraint in the chosen direction
• Balance of forces – friction + lashings + stoppers vs. required restraint, per direction (Fwd, Aft, Left, Right)
• Kippsystem B – cargo tipping on the SPMT, moment balance about the saddle edge, with signed lashing contributions
• Stopper support – steel, chain/D-ring, timber chock, with direct LC
• BOM – bill of materials for every lashing type and stopper
• PDF report – ready-to-print securing certificate with PASS/FAIL evaluation

4 TechDraw Drawing

RoadMind generates a complete A2 landscape TechDraw page with front, side, top, and isometric views of the transport — plus a second top view that shows only the SPMT modules with the stability polygon, the COG, and the load-case envelope:

• Four orthographic views – front, side, top, isometric, all scaled to fit A2
• Stability polygon – rectangle for 4-point, triangle for 3-point, drawn directly in the lower top view
• Load-case envelope – the region in which the COG moves under all signed load cases
• COG marker – red cross, positioned 3 m above the cargo bottom, with the height dimension in the front view
• Overall dimensions – length, width, height, saddle spacing, cargo length, COG position
• Title block – editable fields for title, cargo, date, scale, sheet
• Own template – A2_Landscape_RoadMind.svg, editable and never overwritten

5 PDF Report

One click produces an A4 PDF report with the full transport calculation: cargo data, saddle positions, SPMT configuration, stability, axle loads, suspension points, reactions per load case, self-check, and footer disclaimer. The report follows the same styling as the StowMind reports.

6 Setup Management

Save the entire transport setup — inputs, results, lashings, stoppers, and the last lashing balance — as a single FreeCAD object. Reload it later and the task panel re-fills with the stored values. This lets you keep multiple transport variants in one document and switch between them without re-entering data.