wall partitions

In wall partitions order to partition the strings, I have to mark each module as 1 string in width by 1 string in height. I know this wall partitions is not technically true, but is this the most accurate way to model it? I have also thought of using 3 strings in height, 1 in width due to the module having 3 diodes. Any thought would be appreciated.

http://www.sunista.in/wall-partitions/