Its 113 long by 18 deep by 26 tall walnut plywood unit with center hardwood wine rack built with slats. One shelve behind each door, divider between each door. the top will be 1.25 thick walnut I havent figured out plywood yet so im not sure of wieght , Id guess 350lbs plus weight of china and goods inside.
Its going to float on wall 8" off of floor.The wall is bowed, french cleats wont work unless I shimmed them.
The back may have to be scribed to wall so there may be a 3/4 wide hollow behind unit. Of course I can block it off where attachemnts need to be made. As well as sides may need to be scribed thus again creating the dead space behind back.
Should I use a 3/4 back and lag bolt/ cabinet fastner into studs? Should I just use 1/4 ply and use nailer strips notched into dividers and butt jointed and nailed into ends? Both sides of cabinet are exposed.
A false bottom that allows me to have some steel brackets made to hold it underneath (shaped like a flat L )? I dont know if any steel can withstand the depth of it though an not tear out wall or flex.
Will any of these work? I suppose if uppers can be help up with nailer strip and screws, lag bolts or heavy duty long panheads screws will work well in this application?
Im aware the unit could be stronger than the wall itself, I hope this sint pushing the limits.It is quite long so I will get quite a few fasteners into wall. Hopefully almost every 16 inches.
I think walnut hardwood weighs about 3.25 lbs per bd ft. Top maybe only 62lbs. I think wine rack will weigh about the same. Theres no face frame.
Someone on another forum suggested a false bottom with a 2x4 ledger underneath it tucked up on the underside , so it sits on it , so the shearing power is down and not out which was a good idea.Then fasten it with some grex screws or deck screws etc. in the back of cabinet.
Im not so much worried about fastening it to wall as much as Im worried about it pulling the back off cabinet or away from wall ?
Any suggestions on attaching back to the cabinet? Maybe side screw holes countersunk filled with walnut plugs? Then the back sits in a 3/4 wide rabbett in the sides (back is 3/4 thick).