Don't do what the previous owner of my old place did....
There was a shelving unit built from 2x10's. 3 horizontals that were 6ft long & a 2ft upright at each end....It was all sanded, stained & varnished. Really nice looking structure. (I still have it)
As a backer for this he had attached a piece of 3/16in lauan with brads....
& to attach it to the wall he had driven more brads through the 3/16in lauan...
So the only thing holding it to the wall were about 25 1 1/4brads....
How the hell that thing stayed up I have no idea.
I removed it one day when walling the garage with T1-11 siding. That's when I discovered what was holding it up. I about ****.
I cut a piece of 3/4 ply to replace the 3/16in lauan piece the previous guy has used... I attached that to the back of the shelves with 4in long 1/4in lag bolts which I had countersunk flush with the surface with a Forstner bit (5 into the back of all 3 horizontals)... Then I did the same through the 3/4in ply into the wall studs, but without the countersink. (3 on each the 4 studs I screwed into).
When I moved out that damn thing was a bear to get off the wall....
So my advice is: Do NOT do what the previous owner of my garage did...
...but I have to say 3/4in plywood backer securely attached to the cabinets & the wall will probably withstand an earthquake during a tornado.
