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Jupiter's Thunderbolt.
- Thread starter Jonzjob
- Start date
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Zeddedhed
Established Member
Yep.
I was taught that one when I did my C&G about 20 yrs ago.
We called it a locking scarf joint and used it mainly to extend ridge boards for roofing.
I still use it - it's dead quick to cut and if you're worried about the folding wedges working loose fire in a couple of Paslode nails.
Pete
I was taught that one when I did my C&G about 20 yrs ago.
We called it a locking scarf joint and used it mainly to extend ridge boards for roofing.
I still use it - it's dead quick to cut and if you're worried about the folding wedges working loose fire in a couple of Paslode nails.
Pete
merlin
Established Member
Random Orbital Bob
Established Member
Some years ago we were on hols in Antigua. They have an old British Naval base there, a fascinating piece of history and dozens of wooden buildings. Many of them were super long and all the ridges had those joints. Some had two of them the ridges were so long. Looked fabulous
Billy Flitch
Established Member
Same joint different name no big deal, when I was taught to mark and cut it it was called a hooked nibbed scarf.
In carpentry when you have a splayed cut joint it is looked upon as bad practice to have the cut running off to a feather edge, in the end it will just split, so to stop that the end is cut off it can be cut straight or canted, that cut is called the nib and sometimes the joint is called joggeld
You get it a lot in carpentry on the decks of boats or ships where the deck plank runs into a king plank or a cover board.
On model boats the end of the plank is just cut off on a splay but in real life the end of the splay is cut off and this is the nib.
On the deck of a boat it is the same a miter is not allowed to go to a point but one side of the miter is cut off short (the nib) and the other side runs through so the miter has a square end.
So back to the scarf joint, its funny that the video is in French because talking to a old timer once and he told me that the most difficult scarf he ever had to mark and cut out was one called a French scarf. He drew it out and explained it to me.
From the side the joint looked just like a hooked and nibed scarf, but from the top and underneath the nib was not cut square across the joint but was cut as a chevron so to a point in the middle and as the joint was wedged together it would lock on a central position. The two flat parts of the joint are called the tables and in each table was cut a elongated mortice With floating tenons this was all to help it with stress coming from the side.Ive also seen the hooked nibed scarf held together with a butterfly joint, now obviously this was false but it looked real cool.
Hope this has been of some interest Billy.
In carpentry when you have a splayed cut joint it is looked upon as bad practice to have the cut running off to a feather edge, in the end it will just split, so to stop that the end is cut off it can be cut straight or canted, that cut is called the nib and sometimes the joint is called joggeld
You get it a lot in carpentry on the decks of boats or ships where the deck plank runs into a king plank or a cover board.
On model boats the end of the plank is just cut off on a splay but in real life the end of the splay is cut off and this is the nib.
On the deck of a boat it is the same a miter is not allowed to go to a point but one side of the miter is cut off short (the nib) and the other side runs through so the miter has a square end.
So back to the scarf joint, its funny that the video is in French because talking to a old timer once and he told me that the most difficult scarf he ever had to mark and cut out was one called a French scarf. He drew it out and explained it to me.
From the side the joint looked just like a hooked and nibed scarf, but from the top and underneath the nib was not cut square across the joint but was cut as a chevron so to a point in the middle and as the joint was wedged together it would lock on a central position. The two flat parts of the joint are called the tables and in each table was cut a elongated mortice With floating tenons this was all to help it with stress coming from the side.Ive also seen the hooked nibed scarf held together with a butterfly joint, now obviously this was false but it looked real cool.
Hope this has been of some interest Billy.
xy mosian
Established Member
Cecil Hewett in his book "English Historic Carpentry" refers, on page 264, to this joint as 'A stop-splayed and tabled scarf with under-squinted traverse key'. I think I prefer Thunderbolt. Hewett's example shows four face pegs. Apparently the joint was used for the top plates of the Cressing wheat barn, of about 1250. It was also used there for the outshut top plates.
xy
xy
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'A stop-splayed and tabled scarf with under-squinted traverse key'
Catchy name that just rolls off the tounge :shock: :?
Catchy name that just rolls off the tounge :shock: :?
Steve Maskery
Established Member
merlin":2svi3gih said:
Very neat, Merlin, very neat. But there is something I don't understand (I'm a bear of very little brain, sometimes). What is there to stop the two pieces coming apart in the 1 o'clock / 7 o'clock direction?
Thick Steve
woodbrains
Established Member
Hello,
The nibs are not cut at 90 degrees to the tables. The ends are trapped in an undercut, in other words.
Mike
The nibs are not cut at 90 degrees to the tables. The ends are trapped in an undercut, in other words.
Mike
Woodmonkey
Established Member
Great Odin's raven!
Steve Maskery
Established Member
Ah, I see, thank you.
S
S
