accessible ramp 3d model

Generate a complete 3D model of the entire accessibility ramp structure, not only the handrails. The model must include: The full ramp floor surface (solid concrete base) Two inclined ramp sections The middle landing platform The top landing platform The bottom landing platform Side curbs / wheel guards along the ramp edges Handrails on both sides (as secondary elements) The ramp must be a single complete architectural object, with correct thickness and volume, not a thin plane. Important: prioritize generating the ramp platform and floor geometry first. The handrails must be attached to the ramp, but the ramp base must be the main structure. Style: clean architectural model, simple geometry, realistic proportions, concrete material for the ramp surface, metal material for handrails. Full solid ramp structure with floor + platforms + handrails (not only rails).