The Bossier banner. [volume] (Bellevue, Bossier Parish, La.) 1859-1952, 1912-08-15
BENTON, BOSSIER PARISH, La, THURSDAY,
.bout Il per cent. The careful engf-

about Il per cent. The careful engf-
neer will set his grade stakes not
more than tif,y feet apart. and in no
ease should they hc over n hundred. and
:.n ~, wi!l serve tate, fer ti.. uGicadam
vnrN Ia sra,iin" ample EaHtrriai
..luuiG he left TO tcr!n the shoulders
rnre should be uS"d it, is.ci"ry S!op-
ii. rGiS aiid fills to avoid as far as pos
;siblc settlement of material \ slope Of
rot .c,S lhau one ami one half 10 one
should bc used Care should also he
taken 10 have The gutter grades 50 liked
that there will 10 ut least Il fall "f six :
inches ~ ca |! hundred feet in order tn
l;suNitic -Ir;,n" s!r;'illaSr ;
In 2;'Il"r;li. any stone that is to bc
:#el i'll road h,lildin. should n' test /:
*: tor hardncSs, toughne$S. resistance
- nrdr ana binding Or cc,nrniins val i
He. tbs. specific gravity. weight per
cubic f,,ut and water absorbed are also
,'pi,rilIncd With such data as this in
'sand and ii knowledge Of the v''sH:i!e
and character of traffic TO which the
rnad Is subjected the engineer can
sn%.t available material While the dia-
s,as,.s, ,!iorites and basalts all com
Guuniy known as traprOck. In general
Iuctt the conditions where Inacadam
roads are necessary. yet 1t is unWise to
se!.e, II rock by species alone. as they
all var! greatly.
There are two distinct types of bro
ken stone road in use today, known as
!n;iri,duIn and teifOrd roads, The mac
adam road of today is 50 different from
The type specified by Macadain that the
relation is hardly Recognizable by the
best practices used this road consists III
foundation course of two and one
half inch stone Of varying thickness.
This foundation should be thoroughly
rolled with steam roller and not more
than thickness of five or six inches
rolled ut time. On top Of this Is
placed a three or four inch layer Of one
and one half inch stone, and after thor
oughly rolling layer of rock screen
ings below three quarters of an inch in
size is spread. This layer of screenings
should be sufficient only to fill the sur
face voids of the wearing course and
should not he applied all in one layer.
Each application of screenings should
be rolled in before the next application
is made After the surface has been
thoroughly filled with screenings the
road should be well sprinkled with i,
watering cart aud rolled with Il steam
roller until it is thoroughly bonded
This rolling should continue until the
surface ceases to wave in front of the
roller.
Stone should never be dumped on the
road, and If specially devised spread
ing wagons are not used the stone
should be dumped on boards and spread
from them ON to the road. The con
tractor should be required to place
about hundred tons of No. 2 stone
and screenings at Il convenient place
for each mile Of road built for the pur
pose Of making future repairs.
The telford road of today varies onl!
from the inacadam road in that it ha
a hand paved foundation course. con
sisting of coarse stone eight or min
inches in it's greatest dimensions
These stones are placed on edge III tn
! subgrade by hand OH their broades
; bases and at right angles to the line .
the road, and all irregular portions ar
broken off with hammers.
This type Of road was first designed
by French engineer named TresaSue
p forty years in advance of TelfOrd. Th
? roads built by Telford had t1at sui
grades. but those constructed by Tire
e saguet had cambered subgrades. whic
1 are supposed to have the effect of
/, keystone arch, and this is the form i
9 which they are constructed today
e is rather an interesting fact that i
/ France practically all of the broke
d stone roads are Of the Macadan typ,
4 while in England they are largely G
o the Tresaguet or TelfOrd type.
n Experience has proved that the onl
e way in which roads can be kept
e good condition and ut reasonable GO:
is by continuous and intelligent mai
q tenance 1t is Il mistaken although III
L fortunately general impression th;
{ Certain lyIcS VI todu dlS pSAAhA
e No permanent road has ever been co
o structed or ever can be
n Cutters. catch basins and culver
10 ought by all means to be kept ciea
I and small guliies in shoulders ShOu
- be filled before they become too lars
% The loose stone which nearly alwa.
Il appears on the surface Of Il macad't
n road the first spring after it is bu
!y should be raked up and stacked for
4 ture use Small holes and incipie