LumberJocks

Design help needed - mortise and tenon execution on wide panel

  • Advertise with us

« back to Designing Woodworking Projects forum

Forum topic by bbasiaga posted 08-18-2016 03:09 AM 1132 views 1 time favorited 6 replies Add to Favorites Watch
View bbasiaga's profile

bbasiaga

756 posts in 1458 days


08-18-2016 03:09 AM

So I’m planning a project to make some side tables that will have a deep drawer. The way I have it drawn up, the side apron (that holds the front and back legs together at the top, will be about 8” tall. I’d planned to do mortise and tenon construction here, but I’ve read in another thread that a tenon longer than about 3” is doomed to explode at some point in the future.

So how can I execute this joint? Should I make a 3” wide tenon in the middle of the 8” piece and use just that to hold it together? Two shorter tenons, one a the top and one at the bottom, with the middle open? Should I be looking at another type of joint all together?

Thanks,
Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.


6 replies so far

View jwmalone's profile

jwmalone

769 posts in 165 days


#1 posted 08-18-2016 03:47 AM

Brain, I was reading the other day about a similar problem. The guy used a breathing tenon(?). the tenon was shorter than the mortis, one dowel at very top tight. then a second dowel mid way, but the hole in the tenon was slightly sloted. finally a 3rd dowel with a larger slot. it held the tenon in tight but allowed for expansion across the width of the tenon. don’t member the web site

-- "Boy you could get more work done it you quit flapping your pie hole" Grandpa

View jerryminer's profile

jerryminer

528 posts in 904 days


#2 posted 08-18-2016 05:58 AM

I would use a double tenon with a haunch (short tenon connecting the two)—-gluing the top tenon and putting a peg into an elongated hole in the bottom tenon:

View rwe2156's profile

rwe2156

2192 posts in 944 days


#3 posted 08-18-2016 01:11 PM

^^^ Exactly what I would do!

-- Everything is a prototype thats why its one of a kind!!

View jwmalone's profile

jwmalone

769 posts in 165 days


#4 posted 08-18-2016 02:52 PM

yep that’s what I saw Brain, only it wasn’t a double tenon guess it depends on size the one I saw was a 4 inch tenon same principle. But also he only put glue on the very top of tenon. and it was a fine woodworking or something like tht website not a idiot with tools on utube.

-- "Boy you could get more work done it you quit flapping your pie hole" Grandpa

View splintergroup's profile

splintergroup

827 posts in 685 days


#5 posted 08-18-2016 06:16 PM

I used the same concept that Jerryminer posted above of army bedside table.
Dowel into each tenon, top tenon glued, no glue-elongated dowel slot in the lower tenon.

Works great! (so far)

View bbasiaga's profile

bbasiaga

756 posts in 1458 days


#6 posted 08-22-2016 12:21 AM

I think I can pull that off. Need to get some hardwood dowel stock.

I do have a nice 9” wide board that I could flatten up for this. Any thoughts on whether I should do that, or make a glued up panel instead? I’ve always heard that shorter boards glued up move less, but in this case I’m not sure it matters. Seems like this piece would be well contained and it may not matter.

Brian

-- Part of engineering is to know when to put your calculator down and pick up your tools.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com