Decorah public opinion. (Decorah, Winneshiek County [Iowa]) 1895-1928, 1907-07-31
SIDEWALK SPECIFICATIONS FOR
DEBORAH. IOWA.

Where sidewalks are to be built to the
established grade, and grading is re-
quired in order to bring the part of the
street on which the sidewalk is ordered
built to the established grade, the city
will excavate where more than six inches
of excavating on the average is required,
and fill where more than twelve inches
| of an embankment on an average is re-
quired. Less than this amount of fill
ing or excavating shall be done by the
| contractor. Where walks are required
to be built to the so-called practical
| grade, they shall conform generally to
the surface of the ground, but in no case
will the gradient or longitudinal slope
be allowed where filling the walk one
it six inches or less at the highest point
will obviate such change, and all grad
ing necessary to conform with these re-
quirements shall be done by the con-
tractor. Where filling is required, the
width of the embankment shall extend
at least inches on the top on each side
of the walk. All filling must be done
in layers of not more than six inches in
depth and each layer thoroughly tamped,
to the satisfaction of the sidewalk COM
mittee and its authorized representative,
with twelve pound iron tamper. with a
six inch face. The filling on the sides
of the walk shall be done Immediately
on the completion of each walk and the
removal of supporting timber.
FOUNDATION.
The contractor shall remove the old
sidewalk, where one exists, and pile the
material neatly upon the parking. The
foundation shall be eight inches below
the established grade of the sidewalk,
and the width of the foundation shall
he the same as the width of the walk,
rs stated in the resolution ordering the
same. The foundation shall be thor
oughly tamped with twelve pound iron
tamper, with a six inch face, to the sat
isfaction of the Sidewalk Committee and
its authorized representative.
CEMENT SIDEWALKS.
After the earth has been graded to
the proper height, tamped and smoothed
off to a firm, compact and even surface,
coarse gravel, small broken rock or tile,
clean bank sand, to depth of six inches,
after being spread level and thoroughly
tamped. Upon the foundation thus pre-
pared shall be spread layer of con-
crete three and one-half inches deep
after ramming. The concrete shall be
composed of five parts small gravel and
clean, sharp, coarse river sand, in proper
to be approved by the Side
walk Committee and its authorized rep
resentative, to one part of best quality
Portland cement. The best Portland
of standard band shall be used
and shall be equal in every respect to
the best grades of Atlas cement, and the
right is reserved to require the cement
used to stand the following tests:
Fineness:-Ninety-siX per cent of &C.
ment to pass through No 80 sieve, No.
IS Stubb's wire gauge. Eighty-six per
cent of cement to pass through No. 100
sieve, No. 40 Stubb's wire gauge
Tensile Strength Mortar briquettes;
one part; clean, sharp river sand
Two parts; one day in air and six days
!, water; to stand 1870 pounds per square
pch tensile strain.
These parts must be thoroughly mixed
n dry state, so that no streaks or