Something like this?
Rectangles and curve.skp (79.0 KB)
Or like this - the lower left corner has the divisions in a different place:
Rectangles and curve.skp (78.9 KB)
Start by using the Preferences menu (Window/Preferences on Windows, Sketchup/Preferences on Mac), and select the Template - Simple template - Meters.
Start a File/New to use that template. In the Window/Model Info/Units, set Length snapping to 1m (or even 2m for this model).
Draw a large rectangle for the six straight blocks 36m x width (whatever width you want - I used 4m). Select it and R-click/Reverse faces to get it white side up.
Use the Arc tool to draw the radii - I guessed 45° and 6m and 10m radii, but whatever angle and radii you need.
Use the Rotated Rectangle tool to draw the bottom left 6m x width rectangle.
Complete the curved section by joining the ends of the arcs with the Line tool, and draw the intermediate line where you want it, radially, using the inferences SU provides as you draw with the Line tool.
Ctrl+ Move to Copy the lower left edge 4m up the diagonal - use length snapping, or type in the move distance as 4m.
Move/Copy (that’s using the Ctrl key to toggle between Move and Copy) the vertical line at the end of the arc 4m to the right. Move/Copy that line another 2m right.
Select both lines, and copy them 6m to the right, then type 5x to make five more copies to the end.