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Re: Skin-on-Frame: strongest joints
By:Bill Hamm
Date: 1/2/2012, 1:52 am
In Response To: Skin-on-Frame: strongest joints (james Adams)

: Happy New Year all!!

: Is a scarf joint inherently stronger than a lap joint of the same
: length?

: I have been playing around with different joints today and I find
: the scarf joint a little more finicky than the other woodworking
: joints than I'm used to. How much flex do the stringers need. I
: created a butt joint reinforced by two pocket screws and it is
: darn near unbreakable, but I sense it may be too rigid.

: Thanks for any advice,
: Jim A.

Couple advantages to a scraf joint, one it's pretty strong assuming it is long enough, usually at least 8:1 and often up to 12:1, length vs. thickness.

The big advantage is, done correctly, the scarf doesn't adversely effect the bending of a piece of wood, so the scarf bends naturally just like there was no joint in the wood. A lap joint will end up with a hard spot that'll tend to straighten the bend where the joint is.

Bill H.

Messages In This Thread

Skin-on-Frame: strongest joints
james Adams -- 1/1/2012, 9:51 pm
Re: Skin-on-Frame: strongest joints
Bill Hamm -- 1/2/2012, 1:52 am
Re: Skin-on-Frame: strongest joints
ancient kayaker -- 1/2/2012, 9:44 pm
Re: Skin-on-Frame: strongest joints
Bill Hamm -- 1/3/2012, 2:53 am
Re: Skin-on-Frame: strongest joints
ancient kayaker -- 1/3/2012, 9:53 am
Re: Skin-on-Frame: strongest joints
Bill Hamm -- 1/8/2012, 3:46 am
Re: Skin-on-Frame: strongest joints
ancient kayaker -- 1/8/2012, 11:26 am
Re: Skin-on-Frame: strongest joints
ancient kayaker -- 1/3/2012, 10:01 am
Re: Skin-on-Frame: strongest joints
Bill Hamm -- 1/8/2012, 3:47 am
Re: Skin-on-Frame: strongest joints
ancient kayaker -- 1/8/2012, 11:28 am
Re: Skin-on-Frame: strongest joints
Bill Hamm -- 1/9/2012, 1:32 am