The Robesonian. [volume] (Lumberton, N.C.) 1870-current, 1909-10-25


road building. You want directness to
your road to shorten the distance md
minimize the danger and 10 carry the
surface water to lis nearest and best
exit point. 1t IS not enough TO get the
water Il and out from the road. but il
must be got away from the road
When we have done this we can com
mcnce 10 properly construct the sub
grade, and not before.
AS a general proposition, in accom-
plishing we'll built sub grade il is al
ways well TO remove all loan. roots
and vegetable matter from the pro-
posed travel part of the road: also
everything of springy nature or any
thing found in excavating for said
roadway that will he lab to hcave or
settle and fill all such places with
clean sand or gravel.
! Where it is necessary to fill to bring
the sub-grade up to the height required
] have found III my practice where the
! filling exceeds one foot in depth that
, the filling should be deposited il
, ciurScS not 10 exceed twelve inches il
/ depth. loose measurement, aud require
that each course shall be extended
across the entire fill and completed be
fore commencing another course. NJ
matter if the fill be two or twent,
feet. And this method should be fol
lowed with each succeeding course un
I'll the established grade is reached
The constant travelling over each 0
the courses by The teatns employed il
handling the material will remove tn
possibility of ever having cracke'
FIJI or one that will slide Il fter the roa'
has been constructed. This is q yer
important matter. find. and | hav
used it in my work ia my own state
| also fnd that in the cuts it Is we
not to plow down below that poin
thst * TO be the finished grade OF tn
sub grade. but TO keep it sufficier
height above that SO that when tn
roller is placed on the work it wi
make good solid foundation. and 20
will not have TO resort to filling in til
cut to bring the sub-grade up TO I'll
grade desired. These two principle
Of cut and ill will be found to wol
TO great advantage in the proper co
structiOn Of road.
The shape. OF contour. Of the Su
| grade has been somewhat a matter
controversy, some engineers holding
the level limo foundation and puttlI
on an extra depth Of stone or materi
In the ceater to make the contour
shed from the center line Of the 70:
to the berms, or shoulders, while 9th
engineers have given the snb:grade
- foundation upon WHICH the Weari
material is to be placed the same &C
Fl, tour as the finished road. 1 have us
!. this latter method in my own work
.. my state by reason Of the fact l |
lieye it makes better foundation q
" that the uniform depth Of stone at
II shoulders will assist In holding t
- crown Of the road in shape and f
:. nish q sustaiumPnt at the should
Id line better than to have less del
+, of stone ut the shoulders and grea
h depth at the center Of the road.
~ also assists in case Of u breaking up
n | tDe FG0O OF fracture OF plnff he'
opments in draining to the side,
Z. shoulder. OF the road.
~ The forming OF the shoulders is
pr very important matter. They are re
rs ~ the support of the road. 1t has
in ways been my practice when maj kim
Of shoulder in the fills TO lay ont my rt
L. and put the newly added material
h. or twelve inches into the new ira
a path. Jumping it down firmly and ii
M cutting back to the line. thereby IN
nd ing good. firm shoulder TO work
I'd and to hold in place the stone or or
Il 81 in the travel path Of the road.
y 1t is difficult matter to treat t
question as inteiligeutly through
ga medium OF the written word as
,,t would be With charts. but if tn
he principles are followed in building
IN. sub-grade u good foundation III
at which to put the wearing surface ,
ha result. James Fl. Macdonald. st
Highway Commissioner Of Come
bo cut. IN Good Roads Magazine. \
ts York.