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What size biscuit to use?

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Forum topic by EFA posted 06-11-2009 04:38 AM 1495 views 0 times favorited 5 replies Add to Favorites Watch
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EFA

6 posts in 2154 days


06-11-2009 04:38 AM

I’m working with 5/8” baltic birch and have a several T-joints. Should I use #10 or #20 biscuits?

Thank you,


5 replies so far

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LesB

1090 posts in 2190 days


#1 posted 06-11-2009 08:24 AM

You didn’t say but I will assume you are working with a face frame??
Biscuits won’t add much in the way of strength if that is why you are using them and the smaller size will help even less. They are best for keeping things aligned as you glue them up.
If they won’t show I would use Kreg pocket holes and screws to hold it together. Even if they are visible you can plug the holes.
If you can’t use the screws and still want to strengthen the joint consider dowels inserts or there are other joints you can make, such as lap joints, and mortise and tenon.

-- Les B, Oregon

View Greg..the Cajun Wood Artist's profile

Greg..the Cajun Wood Artist

5264 posts in 2055 days


#2 posted 06-11-2009 07:53 PM

I would use the #10’s. The 20’s might be a little deep for the 5/8 if you are butt joining them.

-- Each step of every Wood Art project I design and build is considered my masterpiece… because I want the finished product to reflect the quality and creativeness of my work

View Moron's profile

Moron

4724 posts in 2640 days


#3 posted 06-11-2009 08:15 PM

2 cents

I politely and respectfully dissagree with LesB but not to say that there arent stronger joinery techniques out there

10s or 20s will work

-- "Good artists borrow, great artists steal”…..Picasso

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LesB

1090 posts in 2190 days


#4 posted 06-11-2009 08:48 PM

4 cents
There have been several test done by various magazine on joinery and the conclusions were pretty unanimous that biscuits add very little strength to the glue joint but then again if it is glued properly the bonds are usually stronger than the wood it self. For face frames it probably makes little difference because the glue bond to the case reinforces the face frame joints. Kreg screws is still the best in my opinion and allow for faster assembly with no clamping.

-- Les B, Oregon

View GaryK's profile

GaryK

10262 posts in 2735 days


#5 posted 06-11-2009 09:36 PM

I always use the largest I can get away with.

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

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