Building corner shelves, need help - Woodworking Talk - Woodworkers Forum
Thread Tools Display Modes
post #1 of 3 Old 04-17-2017, 09:21 PM Thread Starter
Junior Member
Join Date: Nov 2009
Posts: 3
View markshane's Photo Album My Photos
Building corner shelves, need help

Hello. I am building freestanding corner shelves. 4 tiers, pie shaped, 24 inches, with 4 inch wide legs.

Not my first rodeo woodworking but it is my first time edge gluing wider pieces. I've always used fine grade plywood for my big pieces. For example, I used ash plywood for my desk and used biscuits and glue to join 1 1/4 inch thick solid Ash to the edge of the plywood.

For this project I am using solid ash. I thought it would be rather simple to be honest.
I cut each piece to 24 inches x 5.5 inches wide
Jointed the edges and planed the faces to 5/8"
Had nice, flat boards. Then I got busy for a week at my real job. When I came back I noticed a few of the boards were not so flat. I replaced those boards and moved to glue ups.
I used #20 biscuits and dry fitted each piece. Everything was good.
I used Titebond 3 Ultimate glue and brushed the glue on the edges evenly.
I used 2 clamps across the shelf. I also took 2 pieces of Pine across each shelf and clamped them down to each shelf with 4 clamps to keep everything flat.
Got them all done and leaned them against the wall.
Then I went on vacation for a week. Now I am back and 3 of the 4 shelves are a not so nice, perfect curve to them causing the center to raise up from a flat surface 3/16 of an inch.

What did I do wrong?

Why did they warp? I thought the Pine wood spines would prevent that. I used them flat wise, not edgewise. They seemed pretty stiff and it looked flat. I guess I should have used them edgewise?
Should I put a spine under each shelf for both support and to keep them straight?

After running the wood through my jointer and planer to get them flat, I checked each board by laying it on my Delta table saw. It's a cast iron surface and I've checked it for flatness. Each board was flat. Why did some of them bow again? I'm in northeast Texas, DFW. Weather changes but I didn't expect the boards to bow that fast.
Any tips on keeping boards flat?

Any suggestions would be appreciated.

Attached Images

Last edited by markshane; 04-17-2017 at 09:22 PM. Reason: correct grammar
markshane is offline  
Sponsored Links
post #2 of 3 Old 04-17-2017, 10:02 PM
Senior Member
Join Date: Mar 2015
Location: Garland, TX
Posts: 4,232
View Toolman50's Photo Album My Photos
When gluing up wood, I like to leave the final sizing until the last. After taking the boards out of the clamps, run them through the planer taking off only the minimum to insure the boards are perfectly flat after glue-up.
Also, it sounds like you left clamp pressure on your boards for a week. In warm weather, I start removing clamps after 4 hours. Boards will bow if left under pressure for a week.

If you don't have time to do it right the first time, when will you have time to do it over?
Toolman50 is offline  
post #3 of 3 Old 04-19-2017, 05:56 PM
Senior Member
Join Date: Mar 2013
Posts: 994
View 4DThinker's Photo Album My Photos
Best strategy is to make sure the boards have alternating end grain when glued up to make a wide panel.
4DThinker is offline  

Quick Reply

Register Now

In order to be able to post messages on the Woodworking Talk - Woodworkers Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I make L shaped corner shelves like this from solid wood? Caitlin Gonzalez Design & Plans 19 03-31-2017 02:06 PM
Building the T&J Delivery Truck By HTL Bruce Miller Project Showcase 24 12-09-2016 07:04 AM
Building shelves, my methods woodnthings Project Showcase 20 01-28-2016 06:59 PM
Building cabinet doors, cope & stick or Festool Domino? Danny870 General Woodworking Discussion 10 11-08-2015 06:14 PM
Hidden storage in blind corner cabinet thewalnutguy Project Showcase 2 10-03-2015 11:42 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

For the best viewing experience please update your browser to Google Chrome