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Old February 9th 04, 01:35 AM
andrew_carter
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Default Trials obstacle building instructions...


HOPPING POSTS

These are particularly challenging to use and therefore good to practise
on because the landing surface is so small that the rider must
concentrate strongly on his or her balance in all directions. If you
land wrong on one of these (even if you don’t) it’s very easy for most
of us to lose balance.

_Materials_
35x70mm (or similar) planks
60mm long screws
Wood glue

_Building_Instructions_

1. Cut the planks into the following pieces:
- 500mm pieces (3)
- 300mm pieces (3)
2. At the midpoint of one of the 500mm pieces, cut out a 35mm wide
section that extends only half way across (see picture).
3. Repeat for one of the other 500mm pieces.
4. In the final 500mm piece, mark the midpoint and offset that line 35mm
in both directions. Offset these new lines another 35mm and cut out
similar sections as in step 2 between the outermost lines on each
side.
5. Place the two pieces from steps 2 and 3 in the slots you’ve cut so
that the two planks are perpendicular to the third one. The slots of
the connecting pieces should face each other to create a flush join 70mm
high when sittingo n the ground. This is just a test to see if the
slots have been appropriately cut.
6. Extend any slots that aren’t cut deep or wide enough.
7. Glue and screw together each of the three 300mm pieces and the 500mm
one as shown in the picture. Start by joining two together with one
raised 70mm. Then, join this to the piece with the two slots cut out of
it. Finally attach the last 300mm piece. Be careful not to place the
screws too close to each other. Note the screw positioning in the
pictures.
8. Finally, glue and screw the remaining 500mm pieces onto the third as
mentioned. You may also want to screw these two pieces to the middle
structure.
9. Allow the glue to dry before using the obstacle.

_Applications_

- Gapping onto and off in trials lines.
- Holding up narrow balance beams (with extra screws attached)


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