Ordinance 197 - Sidewalks & Crossings6
SPSCIFICATIONO
cement sidewalks, oronswalks, ourbs and gutters,
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The concrete shall be six inches_ in thickness with a wearing
surface laid thereon one (1) inch in thickness, of the same
b-pyp rt.ions respectively, as specified for sidewalks,
All steel and iron shall be furnished by the Contractor*
GRATINGS AND COA1 MES:
All gratings, coal holes and other openings shall have the
proper and approved iron frames embedded in the caacrete of tip
walks while the sane are being built, said castings to be furnished
by the property owners.
Driveways crossing the sidewalk shall be cons ructed in the
same manner as sidewalks, except that the concrete shall be five
(5) inches and the wearing surface on and one-half ( l 1/0 inches
in thickness,
SATE I ,Sr
BROKEY POCK:
All broken rock or gravel used in this varstruction shall be
clean, free from dust and dirt, and, for concrete work, of such
size that tie largest fragment will pass in any directiop through
a circular ring t -(2) inches in diameter* 'or the sub -foundation
the material shall be approved by the ANgineer and must not cant. 1.in
large boulders, A natural mixture of sand and gravel, may be used
if found in the pro-== er proportions and is approved by the City
Eng inee .
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All sand shall be blean, coarse, sbar°p. sand, free from dirt
and coan and acceptable to the Engineer. If necessary, all ,sand
shall be screened.
All: cement shall, be of an acceptable quality of best American
Portland Cement, equal to " Ideal Portland Cement" each.barrel or
package bearing the siamp and name of the manufactu.raer, All
cement shall be fresh, Free From all defects, and shall atand
whatever tests the City Engineer may deem best in order to dete rmire
its fitness for the ,a or! at hand, qnd the Cynt,ractor shall furnish
to the City Engineur the ce nent company's test Beet for each car-
load of cement delivered on the wort'.
FINENESS OF CEMENT:
The cement shall be so finely ground that after bedng thor-
oughly dried by heating, ninety-four percent (91) shall pass thr-
ough. a Vol 100 standard ,sieve, woven from No, 40 :PStubb's wire
gauge*
ACTIVITY OF C MEN'T:
Initial sib; shall not occur in less than thirty (30) minutes
nor more than six hours. The time of setting shall be determined
of C' i1m.ore's wire or Vicatt s needle,
TENSILE STRENGTH OF CEMENT:
The standard section of briguegte, shall be used. The neat
cement final . be mixed into a rather . dry, st.°ilf baste by the addition
of fry 17 to 2q% of its weight of water, In a mortar of sand and
c:e gent t �.e amo� nt of ;�ra.ter used shall be Oka 13 of their