Combined horizontal beam/crossbeam for Mini Warehouse

I really like @WimV's Mini Warehouse design but I needed shelves every three notches and stability normally provided by horizontal crossbeams. But with the original crossbeams, you can only put shelves every four notches (because you need one crossbeam and one beam to support the shelf). I've solved the problem by merging crossbeams and beams to make crossbeams that supports shelves. Both sizes are available (105 and 190). Shelves shown on the picture are the clip-on solid shelves I made.