NEED GUIDANCE ON MATERIAL

I think 1/2” plywood would be strong enough – and lighter, all that 3/4” adds lot of weight.

to attache the bottom – just groove the drawer sides, and leave the back open, then slide the bottom in, and attach to the back of the drawer with a single screw in the center.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

You can calculate amount of shrinkage using these on-line calculators.
http://www.woodworkerssource.com/movement.php
http://www.woodbin.com/calcs/shrinkulator.htm
It will all depend on your climate (seasonal humidity fluctuation) and shop environment (air conditioning, heating). For 30” wide pine ~1/3” of movement could be expected.

I am needing to make these drawers super strong. A 30” wide by 24” by 12” high drawer will hold a lot of tools/power tools. It could be 200 pounds including the weight of the drawer. That is why I chose 3/4” for the drawer boxes.

Vicktor thanks for the links. The solid wood will definitely move a bit.
9I think I might go for the 7/16” plywood for the bottoms.

Any other thoughts?

Thanks

I’m more of favor to use the ply for the bottom and the stock for the boxes, solid wood drawer floors is asking for a failure.

a 1”x2” stiffener under the bottom will help.

-- In God We Trust

Thanks guys. You definitely helped me think this through. I am on a medical leave right now and I have a fair amount of brain fog for now.

Welcome to the forum.. I am with Mr. Finn some sort of cross pieces or stiffeners. Post some pics or show us your shop if you get a chance.

-- Bill - "Freedon flies in your heart like an Eagle" Audie Murphy