Adjustable modular segmentation component on curve

Hope you all can help on how to create above definition. I’ve created above shape in plan view with three variation radius. The 2100mm x 20mm component as a segmented modular required to close above shape as facade envelope. Finding hard the setting out for the shape and to apply equal length component along.

How could you determine the segment length(2100mm)beforehand if you’d like to divide your curve in equal length?
See the linked topic.

Thank Kim.