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Plywood/pine L joint

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Forum topic by mgbbob posted 11-30-2017 01:53 PM 296 views 0 times favorited 8 replies Add to Favorites Watch
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mgbbob

6 posts in 2468 days


11-30-2017 01:53 PM

Hi folks, Working on a sliding shelf that will hold a 65 lb. stereo receiver. The shelf is 3/4” plywood L joined to a 3/4” x 1 1/2” pine board. The shelf will slide on 80 lb. rated ball bearing slides. To connect the plywood and the board I have considered pocket hole joints as well as biscuit joints reinforced with glue. I have also considered a continuous spline joint. Any thoughts or recommendations? Thanks ... Bob


8 replies so far

View LittleShaver's profile

LittleShaver

208 posts in 459 days


#1 posted 11-30-2017 02:46 PM

A good, tight glue joint should be adequate. If you want to add some glue surface, rabbit the pine board 1/4 -3/8.

-- Sawdust Maker

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Carloz

989 posts in 431 days


#2 posted 11-30-2017 02:48 PM

Quite hard to imagine what you are trying to make. A sketch would help.

View rbrjr1's profile

rbrjr1

117 posts in 45 days


#3 posted 11-30-2017 07:36 PM

Modern wood glues if applied properly are stronger than the wood they’re joining.

that being said, rabbet joints, biscuits, and pocket hole joints all would be appropriate for that connection.

-- measure twice, cut once.

View mgbbob's profile

mgbbob

6 posts in 2468 days


#4 posted 11-30-2017 08:57 PM

Thanks guys, I have decided on biscuits. I have the attachment for the Shopsmith and it does a great job. I will post pics.

View ArtMann's profile

ArtMann

691 posts in 656 days


#5 posted 11-30-2017 10:45 PM

I wouldn’t fool with the biscuits. Just glue and clamp it up. If it is done correctly, you would have to use a lot of violence and a hard heavy object to break the joint. I might consider a few 23 gauge pin nails instead of clamps depending on the finish.

View rbrjr1's profile

rbrjr1

117 posts in 45 days


#6 posted 12-04-2017 10:09 AM

I use biscuits or dados for most joints, mainly because they assist me in assembling the pieces. it’s hard to go wrong with tight joints and clamps.

post some pictures of your work.

-- measure twice, cut once.

View mgbbob's profile

mgbbob

6 posts in 2468 days


#7 posted 12-04-2017 03:33 PM

Hi folks, I glued the joint and pin nailed and it seems great. Added the ball bearing drawer slides and tried it out with the 70 Stereo receiver in place. It works great. I will get some pictures soon. Thanks for the advice.

View rwe2156's profile

rwe2156

2716 posts in 1320 days


#8 posted 12-04-2017 04:57 PM

Depends on the length of the shelf. It can start out nice and in a few months it can be sagging.

If weight is a concern with a shelf, doubling the thickness of the ply is a better solution to prevent sagging.

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

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