The Winslow mail., 1921-05-06


out cost by the Town All walks to
have a slope toward the curb of one
quarter % inch to the foot.
(f) All walks at the alley cross
ings shall be constructed so as to
give free ingress and egress to the
alley and flush with the top of the
adjoining walks and shall conform
to Ilans see details on plan No
la, Sheet No. 2.
tg) Openings for drainage shall
snail be left under all alley cross
ilgs where necessary the sizes Cf
ea+h openings to be decided by The
town Engineer.
SECTION III
| All materials excavated in con-
structing the foundations shall be
classified as earth, loose rock and
solid rock and the prices bid for
these classes of excavation, and for
the embankment necessary to bring
the sidewalk foundation to the pro-
per sub-grade, shall apply to ali
work necessary for the proper grad
ing of the foundations.
Whenever considered necessary by
the Town Engineer, some porous
material, srlch as gravel or cinders,
shall be used to bring the foundation
up to the sub-grade, and proper
drainage provided for the sa.ne.
All foundations shall be- cleaned
of all trash and vegetable matter,
and thoroughly rolled or tamped and
dampened before placing any con-
crete upon the same.
Retaining W11s
Wherever considered necessary by
the Town Engineer, stone or con-
crete retaining wall shall be built
to retain the sidewalk foundation.
SECTION "
Cement
The cement used shall be Portland
cement and must conform to the re-
ouirements and be subject to the
tests as set forth in Specifications
No. sc of the Town of Winslow.
Fine Aggregate
Fine aggregate shall consist OF
sand or screenings from hard, dur
able crushed rock or gravel consist
ing of quartzite grains or other
equally hard material, graded from
fine to coarse, with the coarse part
icles predominating and passing
when dry, a.. screen having one
quarter (A) inch openings. 1t shall
be clean, free from dust, vegetable
or other deleterious matter, and all
fine aggregate containing more than
five 90 per cent clay or loan snail
be washed before using.
Coarse Aggregate
Coarse aggregate shall consist OF
clean, hard, durable crushed rock OF
gravel, graded in size, free from
dust, loan, vegetable or other dele
terious matter and Of such sizes a.
! to pass a two and one-half (21a)
.nch round opening and be retained
on a screen having one-quarter (A)
nch openings.
4 Natural Mixed Aggregate
Natural mixed aggregate shall not
/ De used as it comes from deposits
out shall be screened and used a
jpecifed.
Water
Water shall be clean, free from
, lcid oil, a,lkali or vegetable matter
Forms
Forms shall be well built, sub
t stantial, unyielding and properl!
} braced and shall conform to th'
lines given by the Town Engineer
Lumber once used in forms, shall
be cleaned before being used again
Construction
The concrete walks shall be twt
coat work placed as follows: On
the foundation, finished as abov'
specified, and four (4) inches below
md parallel to the finished surface
, of the proposed walk, shall be plac
9 : ed a concrete base three and one
half (31a) inches thick, consisting
of the following materials:
Portland Cement .........,,.......
-,.--.-....-..... One part by volume
Zine Aggregate ....-.-.-....-..-..--.----..
..-....-.......... Two parts by volume
. Coarse Aggregate .,....--..---.-.,-....
J. ....... Four parts by volume
e A sack Of cement weighing ninet.
e four (94) pounds net shall be con
: sidered as having a volume of on
4 % cubic foot