Milford chronicle., 1910-03-25

GETTING THE GRADE READY FOR STONE.
GFrom Good Roads Magazine. New York J
same principle can be adopted in the
simple turnpiking Of a road as that
which will have 10 be employed in the
most expensive construction that we
are called upon to build today.
The first principle 10 follow in every
ease is TO properly drain the section OF
gOad to be improved. after which you
shen take up the question OF sub b-grade,
or foundation upon which 10 build
SOur road. have found the best ma
aerial with which to construct a sub
grade is sand or gravel. Dlsintegrated
sock, with an admixture OF light loan.
makes a capital sub-grade
Sprinkling the sand before rolling.
using a light roller before using the
steam roller or tightening the roller
BY relieving the boiler OF one-half its
water capacity is a great assistance in
6rming the road. AS the sand will not
then creep before the roller. thus max
4ng the subgrade drm. A little sub
coil placed on top of the sand is a
very good practice. This will prevent
the material from being pushed ahead
OF the roller and il will make a good
sustainment for the stone or gravel.
II something is not done to make a
sandy foundation hrm il will shift.
Sighting the Sub-grade is sometimes
practiced by contractors. with the result I
that they do not gain anything for the /
contractor has 10 pay in the end an in /
creased expense owing 10 the fact that F
there will be a greater shriukage in the +
stone.
The wiSest contractor is the man who .
will spend more time with his 10 cents /
an hour help in forming the sub-grade
and thereby require less stone or grav-
el and other incidental expenses This
IS often the reason why the tonnage
OF Stoue per mile has been largely ex-
ceeded over the original estimate Of
the contractor. This is very easily
demonstrated by taking the cost Of the
stone per ton. with freight. the haul
from the cars. the time consumed in
applying the stone on the road to say
nothing about the expense Of watering
and rolling required TO get the road
into a perfect bond-trm and unyield
ing
But you will ask naturally. is not
the road better by reason OF the fact
that more stone has been used:" Not
at ALL This would be- true if a uni
form depth Of stone were on the road.
But it is an intermittent depth. In
some places there may be four inches
OF stone, while in other places there
may be eight inches. The influence OF
the roller is not uniform where the
is not sufficiently hard and
firm Wherever there is an intermit-
tent depth Of stone the road will de
Telop a weakness because the pressure
Df the roller on the road has not been
Uniform.
You must have a good. well built.
foundation as we'll as {
rood surface-a roof to your road. :
10 not and never have believed that
he surface OF the road can ever be
'ome an accomplished fact until this
N important and necessary adjunct 10
good road-the foundation-is taken
are OF.
AntedSting the surface must come u
irectness to your road. then the re- q,
uction OF these grades to a minimum.
ben the question OF drainage. or
hese the most important is under and
urface drainage. after which comes II
be question Of surfacing. the least i'm
ortant OF all things connected with
bad building. You want directness to
oar road to shorten the distance and OF
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