scripete copii proiect complet
TRANSCRIPT
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ntroduction
The seesaw plank pivots on a central support that is concreted into a used car tire.
This makes for a very stable base, yet the seesaw can still be moved from place to place.
The seesaw does not have any handles, thus allowing kids of different weights and sizes to ride the
seesaw by positioning themselves along the plank until they find balance.
For example, a heavier kid would sit closer to the middle and a lighter kid would sit more towards the
end of the plank.
This is a very sturdy seesaw and the kids will have loads of fun.
The pivot height can be adjusted by simply raising or lowering the pivot height bolts.
This projectwill take you through the complete seesaw building process from start to finish, with plans
and step-by-step pictures and instructions.
et!s begin"
Some navigation hints.
The plans and partsare on the next page, followed by the instructions on subse#uent pages.
The indexpage will tell you the contents of each page.
$ny page can be reached by clicking on the page number above, so you can jump back and forth to
suit.
%t!s always a good idea to skim through all the pages first just to get an idea of what!s there.
&entral support plan and partslist
Throughout this projectall
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measurements are given in both metric
'mm( and standard imperial 'ft and
inches(.
)hen selecting the wood for this
seesaw project make sure that it is
suitable for exterior use.
%f you cannot source the exact wood
sizes as shown in this project, then a
near size will do as long as the tire hole
will fit the central supportunit..
*elow is a list of all the parts which are
basically a seesaw plank, a bit of lumber
for the central support, a piece of
galvanized water pipe, a bit of concrete,
half a dozen bolts, some pipeclipsand acar tire.
+sed tires can sometimes be obtained
free from tire stores.
The size of the tire used in this project is
/0-1. That means the tire is
mm '2( wide and has a hole
diameter of 340mm '12(. 5ou can use
a different size tire, just as long as the
width and hole size will accommodatethe central support.
The parts list
A( Four pieces of 4mm x 1mm ' /62 x 6 /62( wood which are 00mm '602( long for the
vertical pieces of the central support unit.
B( 7ne piece of 80mm x 1mm ' /62 x 3 /62( wood which is 316mm '3 /62( long for the
spacer.
C( 7ne piece of 60mm '3/12( galvanized water pipe which is 316mm '3 /62( long for the pivot
bar.
9ote: )ater pipe is measured by the inside diameter, so the actual overall diameter of the pipe
will be approximately 6mm ' /;2(.
D( 7ne piece of 80mm x 1mm ' /62 x /62( wood which is 3000mm '0ft( long for the
seesaw plank.
E( Four pipe saddle clips 'size to suit( to fix the water pipe 'pivot bar( to the seesaw plank.
F( Four 6mm '/62( galvanized carriage bolts which are 0mm '42( long.
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G( $ used car tire about mm '2( thick, 400mm '6ft( overall diameter and with 'at least( a
340mm '1 /;2( hole diameter.
H(
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To three-#uarter-fill the average heavy-duty
wheelbarrow, put in 4 spades-full of gravel, 1
spades-full of sand and 6 spades full of cement
'which is a ratio of part cement, 6 parts sand
and 3 parts gravel(.
=ix it all together before adding water.
Then add about half of a standard household bucket 'more or less( of water. $dd a little at a time.=ix with the spade from the bottom and fold over. &ontinue doing this and adding the water untilthe mix is a uniform consistency.
Tip:when mixing, a smaller spade is easier toworkwith than a larger one.
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is everywhere inside the tire.
&heck the front for s#uare
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=ark the center of the seesaw plank
=easure and find the middle of the seesaw plank.
>raw a s#uare line across the middle of the
seesaw plank using a set s#uare.
=ark for the pivot bar
>raw two more s#uare lines. 7ne each side of themiddle line.
=ake the two outside lines the same distance
apart as the outside diameter of the pivot bar
'water pipe(.
Bnsure that the two outside lines are e#uidistant
'the same distance apart( from the middle line.
@osition the pivot bar
@artially hammer in three nails as shown in the
drawings.
The nails are to hold the pivot bar in place and stop
it from moving until it can be fastened.
@lace the pivot bar on the seesaw plank between
the nails. Bnsure each end overhangs the sides ofthe plank by the same amount.
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Fasten the pivot bar
Fix the pivot bar to the seesaw plank
with pipe saddle clipsor other suitable
fastenings.
?emove the guide nails
7nce the pivot bar is fastened to the seesawplank, the three guide nails can be removed.
$dd the seesaw plank to thesupportunit
@ut two carriage bolts into the pre-drilled holes in
the central support unit.
There is a choice of two heights.
9ow it!s simply a matter of placing the seesaw
plank over the central support and lowering it until
the ends of the pivot bar rest on the carriage bolts
between the slots in the vertical pieces of thecentral support unit.
>one"
$uthor: es Cenny
Bditor: =aree $nderson
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