96
Timber Setties.
Timber jetties
Are permitted
to the into the Prage wall
the level
of the top. As
sill is laid
only
above
e from
a thick leak
At thèse piir is: apt to
but the
Count
ous the
I shaken der
get
masonry
during typhoons
of larger stones ands
better workmanship in the new wall.
check this.
the second
a rule
will
greatly
Muder
the
ground.
wind.
at the
che
string
sey Meredary
PU
of masonry,
back
the
beams
of
the jitty
are passeds in
through spaces made by the removal
stones, and bolted
of too coping stones,
down to the sill hand- sketch.
AV
shewn
in the
LOW WATER.
circumstances the wil is a
one for without this support from
the shore most
of
thi
piens could not stand at all owing to the a piles for the first 30 feet out being
as a rule only driven Lown a
fut
of
rt
of
few
the hardness
the bottom, and where pack pre-
vails the
gennal use
mud sills
of
trestles on
sleepers.
though a good vertical form of
resting
support gives thems
Mo
ታና
stability.
against side or longitudinal
strains
or shocks.
Drain
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