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Treenails
Introduction
A treenail is a wooden peg or dowel which can be used to fasten pieces of wood together, it is a traditional method, usually a well seasoned treenail is driven into a hole, when it takes up water, it will expand and 'grip' its position. Simple but quite effective fastening of old.
It was considered suitable use in the Grayhound project and would be used to join frames together, and planks to the deck and the hull. It was deeded a variable method against metal fastening due to their increasing cost and the use of oak that was a waste product to make the treenails.
Procedure
There are 3 short videos:
Part 1
- Treenails are shown being made.
Part 2
- Treenails are used to fix frames together
Part 3
- Treenails are used to fasten a hull plank on to Grayhound
CAD Images of the Process
Procedure explained through the use of computer aided design and captions from the boatbuilder, as discussed in the accompanying video clips.
Procedure explained through the use of computer aided design and captions from the boatbuilder, as discussed in the accompanying video clips. - See more at: http://www.boat-building.org/learn-skills/index.php/en/wood/treenails/#sthash.lSegyQh1.dpuf
Oak stock cut to size
CAD img 1
Oak stock shaped into peg
CAD img 2
Slits cut into both ends
CAD img 3
Section of a typical frame
CAD img 4
Holes drilled through the frames
CAD img 5
Treenails fitted, leaving one to do...
CAD img 6
Treenail hammered in
CAD img 7
Treenail hammered in
CAD img 8
Wedge is hammered into each end
CAD img 9
Wedge is hammered into each end
CAD img 10
Treenails cut to length
CAD img 11
Typical section through the frame showing the fitted treenail
CAD img 12
A typical section shows a frame with hull plank running vertically
CAD img 13
A blind hole is drilled through the plank into frame
CAD img 14
A blind hole is drilled through the plank into the frame
CAD img 15
Treenail is ready to be knocked into the hole
CAD img 16
As the wedge touches the end of the hole...
CAD img 17
...It gets pushed into the treenail
CAD img 18
Close up the process at the end of the hole
CAD img 19