Using a time
tested method we obtained reasonable accuracy (we think!)
as the 4' level couldn't find an error. Fill a
transparent hose with water and decide on a height above
the highest point of the frame, then lowering or raising
the other end also on a ruler, until the high end was at
the decided level. This would then tell us how far the
other end point was out. We then raised the beam with
metal shims.
( Finally found a use for all that stainless steel flat
bar we had laying around that we never used! ) This was
done at various points around the frame. The true size of
our sailboat to be has become apparent at this point. We
could have made the work area a 'bit' larger! |
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