Brownsville herald. [volume] (Brownsville, Tex.) 1910-current, 1928-03-09

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willie and ON the line and grade ns
established by the City Engineer,
and further that such person will
ave the City Of Brownsville harm
less from ali loss or damage 70 any
person. Of whatsoever character,
arising hy reason or negligence on
the part cf che contractor in per-
forming said work, cr in leaving thH
same unruarded. or from any other
cause. The said bond shall further
recite that all work done by the con-
tractor during the year for which
said bond holds good shall be per-
formed 20 the satisfaction Of the
City Engineer.
PROPERTY OWNERS 10 CON-
STRUCT DRIVEWAYS; IL is che
duty of all persons owning prop
erty on paved streets I'm the City
OF Brownsville 20 construct nc their
W cost and expense returns or
driyeways paved with brick. stone or
other durable material. leading from
curb line 10 the property line of
such lots as may be necessary 20
enter with any vehicle from the
street, said work 10 he done on
grades furnished BY the City EnRi-
neer and under hts supervision.
INGREDIENTS Cement or con-
crete sidewalks, driveways. curbs or
cutters shall be built Of Portland
cement. fine aggregate and coarse
aggregate.
Fine aggregate: The fine aasra-
gate may he very coarse. clean sand.
or the fine product or rock crush,
made. from IA very hard rock. such ns
trap rock, quartz, flint or granite.
The fine aggregate shall be uni
formly graded In size from one-qunr-
ter inch down, but not more than
ten per cent shall pass a screen hav-
ing thirty (30) meshes to the lineal
inch.
Coarse aggregate: The coarse az
Rregnte may he either "A clean, hard,
angular gravel or crushed rock. vary
ing In size from one-quartcr inch
70 one and one-half inch. The stone
made must not be softer than a very
hard grade Of lime stone.
Top finish:
The top finish shall be n mortar
composed or one part Portland &C.
ment and one and one-half parts az
fine aggregate. thoroughly mixed dry
before the addition III water. Where
top finish IA used for the finishing
Of horizontal surfaces. IL must be
applied 70 the concrete before the
concrete has been in place more
than ten ti0) minutes. Where top
finish ia used ON vertical faces,
such INV the face az a curb. IL must
be rlastered against the form aB the
concrete IN built ur in Che from.
After the said form haa been re-
moved (Which should be done before
the top finish has received it's final
set) the surface should be troweled
and then brushed 10 remove trowel
marks. The only plastering that will
be allowed will he on sr1ts that are
rnurhened H. the renewal of the
forms, and slch ~plasterinE shall be
done as soon as the forms are re-
moved. All TOP finish Ia 10 be pro-
tectcd from tie hot "a and kept
moist for n period Of three days
after being placed.
Concrete body: The concrete body
shall be composed of one Part Port
land cement. two and one-kalf parts
fine aggregate and four parts "a
c0arze aggregate. The ingredients
of The concrete shall be thoroughly
mixed. sufficient water added a. OBJ
tain a consistency satisfactory "a
the City Engineer. and the mixing
continued until the materials are
uniformly distributed and each par.
ticle Of fine aggregate IL thor
oughly coated with cement. and each
partical or coarse aggregate Ia
thoroughly coated with mortar. The
concrete prepared as above srafil
fled shall be Immediately deposited
on the foundation or cushion and
solidly tamped with proper rammerE
so as TO fill all voids and until free
mortar appears on the surface.
The above proportions are based on
the assumption that the fine and
coarse aggregates are well graded
III, in the opinion or the City EnEi-
neer. they IRE not well graded, ther
Che concrete shall he 10 apportioned
that the mortar shall contain ten
tI01 per cent more cement than Il
required 20 fill the voids in the fine
aggregate and the quantity of mortar
shall be ten ll0) per cent more than
80 ANAAAAEK ~ AAAA MAE NUkAr AA AA@
coarse aggregate, but In NO instance
shall the mount or cement used he
less than one barrel to each forty
t401 square feet or completed walk
FOUNDATION: The foundation
shall consist Of firm hard soil, from
which ell vegetable matter and other
loose material has been removed. In
the event that il is Necessary TO build
Up the foundation. the same shall be
done with selected earth, or other
material satisfactory TO the City En-
Eireer, and shall be built up and
we'll tamped in six (6) inch layers, and
said filling shall extend az least one
Oh foot on each side Of the walk OF
other structure.
LOCATION AND GRADE: All side.
walks. curbs or cutters shall be
built as located by the City Engineer,
and on the grade established by him,
AT street intersections, and mt other
places, the curb and gutter may be
built on n curve having n radius mr.
specified by the City Engineer, and
the Contractor shall receive no extra
compensation on account of such
work being on a curved alignment
Where ~driveways occur into private
property across the parkways be-
tween the curb line and the sidewalk
such ~driveways shall be built with
N return curb. having N vertical face
and joining the main curb on the
street with not less than a two I'D
foot radius.
CURBS: Standard curbs shall be
six 90 inches in thickness and eigh-
teen (1S) inches in height. To be
built Of concrete, with the exception
If the face next 10 the street and the
top, which should Ne composed "a
three-fourths t3-A) inch of top finish
The outer corner On the curb shall
he rounded 10 a three-quarter-inch
radius. as shown or the standard de.
sign en- file in the City Engineers
cffice.@
CURB BARS: Where the curb will
he subject TO abrasion. the City En-.
Rineer may require the use off ar
approved form Of galvanized curE
bar about tNo (2l inches On the face
accurate nnA uniformly rrnvod. with