Plywood thickness question

[missmary]

I'm drawing up plans for stackable 36" L x 18" W x 18" H reptile enclosures. I first considered using 3/4" oak plywood, but realized just how heavy each of the 4 units would end up being if constructed entirely out of the 3/4" plywood.

What would you suggest as the minimum thickness plywood for stackable cages? Could I use 1/2" plywood or 1/4" plywood with furring strips for added support without having to worry about the plywood sagging or the sides collapsing under the weight of the cages above?

 

[CHOMPERS]

If you use firring strips to make a frame, then 1/4" will be plenty strong. In addition to screwing it together, use some wood glue too. You'll be surprised how strong they will be.

 

[missmary]

If you use firring strips to make a frame, then 1/4" will be plenty strong. In addition to screwing it together, use some wood glue too. You'll be surprised how strong they will be.

So 1/4" + furring strips will allow me to safely stack 4 enclosures on top of one another without worrying about the bottom enclosures getting crushed?

Sorry for being so redundant, but I kind of need this assurance

On a lighter note, reduced weight (from around 225 lbs for the total structure using 3/4" to around 75 lbs using 1/4") as well as reduced cost (50% less!) would be absolutely awesome if I could use the 1/4"

 

[CHOMPERS]

Yep, stacked four high won't be a problem.