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Forum topic by GPM posted 08-26-2010 10:40 PM 1157 views 0 times favorited 7 replies Add to Favorites Watch
View GPM's profile


26 posts in 2793 days

08-26-2010 10:40 PM

I am in the process of finally setting up my shop the way I want it. This includes lots of deep and wide drawers. I have built the cabinets and am ready to start on the drawers. I am also trying to use up as much stock as possible that I already have on hand.

So for the drawer box I am using an A/B 3/4” plywood on all four sides. The front will be something nicer. The big question is for the bottoms. I have a large stack of 1/2” x 12” x 50” industrial shelving that is pine. This stuff is old so it is dry and fairly hard. I would like to use these for the drawer bottoms. I can biscuit and glue up wider pieces as necessary.

Question – on the sides/back I intend to use biscuits, glue, and screws for joinery and run a groove for the bottom. If I use the pine boards, can I join them to the drawer frame in any way? How much would they actually move if they are 30” wide? Can I glue them and tack them on two sides? Four sides?

Any wisdom is appreciated.


7 replies so far

View PurpLev's profile


8534 posts in 3611 days

#1 posted 08-26-2010 10:45 PM

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.

View Viktor's profile


463 posts in 3381 days

#2 posted 08-26-2010 10:53 PM

You can calculate amount of shrinkage using these on-line calculators.
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.

View GPM's profile


26 posts in 2793 days

#3 posted 08-26-2010 11:31 PM

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?


View NathanAllen's profile


376 posts in 3107 days

#4 posted 08-26-2010 11:37 PM

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.

View Jim Finn's profile

Jim Finn

2647 posts in 2885 days

#5 posted 08-26-2010 11:55 PM

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

-- Website is

View GPM's profile


26 posts in 2793 days

#6 posted 08-27-2010 05:27 AM

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.

View wseand's profile


2796 posts in 3004 days

#7 posted 08-27-2010 05:43 AM

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.

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