curtain wall grid - referencing 2d geometry

[gbrl.frdmn344420]

I am wondering if it is possible to create the curtain wall grid divisions via a 'sketch mode' or by referencing 2d geometry. The reason I ask is because in order to get my spacing I had to draw it out in autocad anyways. It seems like instead of laying down each line, one at a time, there should be a way to just refer to this geometry or create it in a simple sketch mode.

Can anyone suggest how I might do this?
thanks