Just saw this short on YouTube,
Pretty cool!
Not looked into them any further yet mind.
Wooden nails? Who’d of thunk it?
- Thread starter dephill
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Just saw this short on YouTube,
Pretty cool!
Not looked into them any further yet mind.
Yojevol
Clocking on
Similar to Miller Dowels which have been around a long time
Similar looks and function but very different process.
No drilling, no glue, just shot out of a nail gun and “lignin welded” in the process.
...looks as tho they were pre-drilled to me. Cannot imagine that going into timber without. Lignin 'welding' also seems a misuse of terms.....friction seems to be involved rather than melting.....?
Friction welding is a thing, friction is what does the melting.
The idea with these is that the lignin in the wood and the (added) lignin in the nails melts due to the friction of the nail penetrating the wood. When it sets again the pullout strength is (apparently) 4x as strong as the equivalent metal nail.
Did you watch the video? There’s no way the holes were pre drilled, he just holds up the nail gun and shoots one in.
The idea with these is that the lignin in the wood and the (added) lignin in the nails melts due to the friction of the nail penetrating the wood. When it sets again the pullout strength is (apparently) 4x as strong as the equivalent metal nail.
Did you watch the video? There’s no way the holes were pre drilled, he just holds up the nail gun and shoots one in.
Inspector
Nyuck, Nyuck, Nyuck!
I wonder how they would work for wooden boat construction/repair?
Pete
Pete
I remember seeing an item on I think Tomorrows World, showing my age now!
Someone had invented nylon staples for applications where ordinary steel ones would rust. Principle was that if you get something moving fast enough it can penetrate things in a way you wouldn't think possible.
To demonstrate the idea they had a guy fire a section of ordinary wax candle out of a, presumably unchoked, shotgun. It went straight through a two inch plank, leaving a pretty neat hole the diameter of the candle.
No idea if the staples took off, but interesting demo.
Someone had invented nylon staples for applications where ordinary steel ones would rust. Principle was that if you get something moving fast enough it can penetrate things in a way you wouldn't think possible.
To demonstrate the idea they had a guy fire a section of ordinary wax candle out of a, presumably unchoked, shotgun. It went straight through a two inch plank, leaving a pretty neat hole the diameter of the candle.
No idea if the staples took off, but interesting demo.
These had a lot of exposure five or six years ago. At the time there was a video from the manufacturer showing a lot of detail. I’ll see if I can turn it up.
Our house in Tasmania is built about 1860.
The original smaller section.
It's all timber. Split rafters, pit sawn studs and plates.
Top wall plates dovetailed together, studs morticed into top and bottom plates.
Flooring pit sawn with some later circular sawn.
Shingles still under the corrugated iron.
Few iron nails. Many wooden dowels ½ to ¾ inch diameter, cut flush
The original smaller section.
It's all timber. Split rafters, pit sawn studs and plates.
Top wall plates dovetailed together, studs morticed into top and bottom plates.
Flooring pit sawn with some later circular sawn.
Shingles still under the corrugated iron.
Few iron nails. Many wooden dowels ½ to ¾ inch diameter, cut flush
Jacob
New Luddism. Awake and resist!
They were standard practice with early boat construction. "Trenails". This was C18 ship:
Wildman
Established Member
Yojevol
Clocking on
From your link:-
It is driven into a hole bored through two (or more) pieces of structural wood.
As pointed out to me earlier in the thread, these things are fired into the substrate.
Find out more here.
Cross section of the nail inserted:-
Nail - beech, timber - pine
Can't be used in some hardwoods without drilling first
To get the 2 items being joined into close contact they would have to be clamped first.
Brian
Really cool how they show the lignin welding effect by trying to finish hammering in the nail shot halfway in.
I guess anywhere you might want a better finish look than a standard steel nail? Although probably non structural. I notice in the video he says 4x pullout strength but doesn’t mention shear strength.
I guess you could use for fencing, decking, timber cladding….?
I guess you could use for fencing, decking, timber cladding….?
stuart little
Established Member
That's how ships were built in times gone by. But without 'heads', called 'trennells' [treenails].
really not the same
