HomeMy WebLinkAbout346-1/2 - 346.5 - Specifications 39 - Pavement & Curb Construction• a
RESOLUTION NO.3�G.I /��
A RESOLUTION OF THE BOARD OF TRUSTEES OF THE
CITY OF NEWPORT BEACH ADOPTING SPECIFICATIONS
NO. 39 FOR THE CONSTRUCTION OF CEMENT CONCRETE
PAVEMENTS, CEMENT CON"RFTE' CL:r.FS AND CEMENT
CONCRETE SIDEWALKS WITHIA SAID CITY.
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Be it resolved by the Board of Trustees of the City of
Newport Beach, that the following 6pecifications, to be known as
Specifications No. 39; for the construction of cement concrete
pavements, cement concrete curbs and cement concrete sidewalks
in the City of Newport Beach, be, and the same are, hereby adopted.
WORK TO BE DONE
Under these specifications the Contractor will be re-
quired:
1. To excavate or fill in to such an extent and in such a
manner as may be required by the plans, profiles and cross -sec-
tions, and these specifications, the area upon which the improve-
ment hereinafter provided for is to be constructed.
2. To furnish all materials as hereinafter provided for and
required for the construction and completion of the improvement in
accordance with the plans and specifications, and all labor, tools
and equipment necessary for the performanne of said work.
3. To construct concrete pavement, concrete curbs and con-
crete sidewalk as hereinafter specified.
GRADING
Grading shall include all filling, the removal of all
earth, sand, stone or all other material, of whatever nature it
may be, that may be encountered in preparing the road, and shall
also include all trimming and shaping required to bring the sur-
face of the road to grade and cross - section. When mud or other
soft material is encountered, it shall be taken out and the space
filled with good earth, sand or gravel; which, if it is earth or
gravel, shall be rolled until the surface of the foundation
ceases to creep in front of the roller. The Contractor, however,
will not be required in such cases to excavate mud or other soft
material to a depth greater than two feet below the sub- grade.
All filling shall be done with good sound earth, gravel
or sand. Whenever a fill is to be made of earth or gravel, the
embankment shall be brought up in layers not exceeding six inches
in depth, and each layer thoroughly dampened and rolled with a
roller weighing not less than 200 pounds per lineal inch width of
tire, until it is firmly compacted.. when the fill is made with
sand, it shall be brought up to grade and thoroughly dampened and
compacted.
No material of a perishable, spongy, or otherwise im-
proper nature shall be used in filling. The space over which
fills are to be made shall first be clew ed of all brush, timber,
trash or other debris unfit for foundatiun.
During the process of grading, the street shall be
maintained in a reasonably good condition for traffic, care being
taken to remove the surplus material as evenly as possible over
the entire surface of the street.
The street shall be plowed uF not to exceed one mile in
length in advance of the laying of the concrete pavement. The
Contractor shall at all times -raper drainage on the
street.
The width of the street to be graded shall conform
to the plans, profiles and cross - sections.
After a section of street has been graded, as herein
specified, the surface shall be thoroughly drenched with water,
and when sufficiently dry, shall be rolled with a roller weighing
not less than 400 pounds to the lineal inch width of tire until
the surface is unyielding. Depressions made by rolling shall be
levelled up with good earth and again rolled. Such portions of
the street as cannot be reached by the roller, and all places
excavated below sub -grade and refilled, and all pipe trenches and
other places that cannot be properly compacted by the roller,
shall be tamped solid, and in cases of wet weather, or soft or
muddy ground, making use of the roller unsafe or impracticable,
the rolling shall not be undertaken until the ground has become
sufficiently dry. If the sub -grade consists of sand the rolling
thereof will not be required but it shall, be compacted by wetting
down thoroughly and smoothed to conform to cross- sections.
The Contractor shall notify the Engineer when a section
has been brought to sub - grade, when the latter will check the
elevations of the same, and if the work iL found to be in accord-
ance with the specifications and &-saes given, the Contractor
shall proceed as hereinafter mentioned.
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CONCRETE PAVVIENT
• Upon the sub -grade of .he street prepared as above
described and thoroughly dampened, •-here shall be laid a concrete
pavement of the thickness sh.cwn upon the ;.glans, profiles, and
cross- sections and composed of ah,:j fo_.l wing material, to -wit:
One (1) part oz' by volume to 4.60 parts
of mixed aggregate by vo ^..e. The :il_ied aggregate shall be com-
posed of a combination of san3 and of gravel or broken stone.
The sand and the gravel or broken atone s.iall be measured sep-
arately by volume, and the parts by volume of each of the said
materials required, which, vghen e3e•)in e-d Ga'_11 be equal to the
4.60 parts of mixed aggregate hereinbefore mentioned, shall to
determined by the following forr~ulsa
(A - 6.40)
C = 5.80(--- - - - - -)
(A - B )
D = 5.80 - C
Where A is the fineness modulus of the gravel or broken stone.
B is the fineness modulus of the sand.
C equals the parts of sand by volume.
D equals parts of gravel or brokezi stone by volume.
The fineness modulus of the sand and the gravel or broken
stone shall be determined by a sieve analysis, using the following
sizes of standard siev-o8
100 -mesh, 48 -mesh, 28- mesh.,, ;.-- -mesh, 8 -mesh, 4 -mesh,
3/811 -mesh, 3/411 -mesh and 1 112'
The sum of the percentaeeb )f mate— :'al by weight of the
sample coarser than ea-,h of the re :.peg ive s_;•aa of the standard
sieves hereinbefore mentioned, di -r-aed )v P UO ie the fineness
modulus of the material.
The volume of cement yei, cab;.c yard of concrete in place
shall not be less than 5.90 cubic fee: nor more than 6.10 cubic
feet.
Said materials shall cor,forin to the following specifi-
cations: A sack of cement weighing ninety -four (94) pounds not
shall be considered as having a volume of one cubic foot.
CONCRETE MATERIALS
Including cement, sand, gravel, broken stone, and
water, and for all puTpcses shall conform to the following speci-
fications;
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CEMENT
All cement shall be Portland Cement, and must conform
• to the following requirements and be subject to the following
tests, which will be open to the contractor and will be made by
the methods and under the concitinue prescribed in Specifications
C -9 -17, adopted by the American Society for Testing Materials in
1916.
(a) CONSISTENCY: All cement for set tests, test pats, and
neat briquettes will be mixed with sufficient water to reduce the
cement to normal consistency, as prescribed by the Specifications
of the American Society for Testing Materials, hereinbefore re-
ferred to. Neat briquettes will be compacted by light tamping.
Mortar briquettes shall be mixed to a state of plasticity corre-
sponding as nearly as possible to normal consistency in neat
briquettes.
(b) FINENESS: The cement must be evenly ground, and when
tested with the following standard sieves, must pass at least the
following percentages by weight:
No. 100 Sieve, having 100 meshes per lineal inch -
92 per cent.
No. 200 Sieve, having 200 meshes per lineal inch -
75 per cent.
(c) TIME OF SETTING:, It shall develop initial set in not
less than one hour, nor more than ten hours:
(d) TENSILE STRENGTH: Neat briquettes one inch square in
section shall attain a minimum strength followsi
At 24 hours in moist air - 175 lbs.
At 7 days (1 day in moist air and six in water) -500
pounds.
At 28 days (1 day in moist air and 27 days in water)
600 pounds.
Briquettes one inch square in section, made of one part
of cement, three parts of standard testing sand, shall attain a
minimum strength as follows:
At 7 days (1 day in moist air and 6 days in water)
200 pounds.
At 28 days (1 day in moist air and 27 days in water)
275 pounds.
The sand test must in all cases show an increase in
strength at 28 days over the 7 -day tests.
(e) SOUNDNESS: Pats of neat cement about three inches in
diameter, one -half inch thick at the center, and tapering to a
thin edge, will be kept in moist air for a period of 24 hours.
A pat will then be kept in air at normal temperature
and observed at intervals for at least 28 days.
Another pat will, after having been kept 24 hours in
moist air, be placed in water 2.t normal temperature and maintained
for three hours.
These pats, to satisfactorily pass the requirements, must
remain firm and hard, and. must not show any reigns of distortion,
checking, cracking, blotohin [,; or ('isintegrating.
M
• (f) PROTECTION: All cement stored must be protected from
the meather and be delivered to the work in the original-package
of the manufacturer. No cement shall be used which has been mixed
in any way with another brand or quality of cement or which has
been tampered with in any way after being placed in the original
package of the manufacturer, nor shall any cement be used from
packages containing lumpy cemont or which has been reground.
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SAND
DEFINITION OF SAND:
The fine, granular material naturally or artificially
produced by the disintegration or corrosion of rock.
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SPECIFICATIONS AND TESTS FOR SAND TO BE USED IN CONCRETE. PAVEMENT
1. OIL. Sand shall be free from oil.
2. OFIGINIC MATTER. Sand, when tested in accordance with
Method of Teat hereinafter described, shall not show a solution
color darker than the standard color solution.
3. STRENGTH. Sand, when tested in accordance with Method
of Test hereinafter described, shall not show compressive strength
at the age of seven (7) days, less than that of Ottawa Standard
Sand, similarly tested.
4. TASHING. Sand shall be thoroughly and uniformly washed.
After washing, sand; when tested in accordance with Method of Test
hereinafter described, shall not contain more than three (3) per
cent by weight of silt, loam; clay, etc.
5. SIEVE ANALYSIS. Sand, when tested in accordance with
Method of Test hereinafter described, shall conform to the follow-
ing sieve analysis, by meight:
A: Not more than five (5) per cent minus the per cent
of silt, loam, clay, etc., determined above (Paragraph 4, "Washing')
shall pass a No. 100 sieve:
B. Not less than fifteen (15) per cent and not more
than thirty -five (35) per cent shall pass a No: 30 sieve.
C. Not less than ei hty -five (85) per cent and not more
than ninety -five per cent (95 %� shall pass a No: 4 sieve.
D. Not less than ninety -five (95) per cent shall pass
a No. 3 sieve.
E. All shall pass a 3/8 inch sieve.
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SPECIFICATIONS AND TESTS FOR SAND TO BE USED IN CEMENT
MORTAR FINISH Oil CEMENT CONCRETE CURBS AND SIDEWALKS
• 1. OIL. Sand shall be free from oil.
2. UANIC MATTER. Sanc;.; vvhan tested in accordance with
Method of Test hereinafter described, shall not show a solution
color darker than the Standard color solution.
3. STRENGTH. Sand, when tested? in accordance with Method
of Test hereinafter described, shall not show compressive strength
at the age of seven (7) days less than that of Ottawa Standard Band,
similarly tested.
4. WASHING. Sand shall be thoroughly and uniformly washed.
After washing, sand, when tested in &ccordance with Method of
Test, hereinafter described, shall not contain more than three (3)
per cent by weight of silt, loam, clay, etc.
5. SIEVE ANALYSIS. Sand when tested in accordance with
Method of Test hereinafter described, shall conform to the follow-
ing analysis by weight:
A. Not more than six (6) per cent minus the per cent
of silt, loam, clay, etc. determined above (Paragraph 4, "Washing ")
shall pass a No. 100 Sieve;
B. Not less than seventeen (17) per, cent and not more
than forty -two (42) per cent shall pass a No.. 30 sieve.
C. All shall pass a No. 4 sieve.
A. Method of Test for Or anic Impurities.
1. a A representative test sample of sand of about 1 lb.
shall be obtained by quartering or by the use of a sampler.
(b) A 12 oz. graduated glass prescription bottle shall
be filled to the 4 1/2 oz. mark with the rand to be tested.
(c) A 3 per cent solution of sodium hydroxide (NaOH) in
water shall be added until the vol me of Band and liquid, after
shaking, gives a total value of 7 Yiquid ounces.
(d) The bottle shall be stoppered and shaken thoroughly
and then allowed to stand for 24 hours.
(e) A standard color solution shall be prepared by
adding 2.5 cc. of a 2 per cent solution of tannic acid in 10 per
cent alcohol to 22.5 cc. of a 3 per cent sodium hydroxide solution.
This shall be placed in a 12 oz. prescription bottle, stoppered
and allowed to stand for 24 hours, then 25 cc. of water added.
(f) The color of the clear liquid above the sand shall
be compared with the standard color solution prepared as in
paragraph (e) or with a glass of color similar to the Standard
solution.
2. Solutions darker in color than the standard color have a
"Color Value" higher than 250 parts per million in terms of
tannic acid.
B. Method of test_ for strength.
t Both concrete sand and Ot -tawa Standard Sand (the latter
as hereinbelow described and defined) shall be made into mortar
composed of one (1) part by weight of Portland Cement, and two
(2) parts by weight of sand. The consistency of the mortar made
with concrete sand shall be the same as that of the mortar made
with Ottawa Standard Sand. All mortar test specimens shall be
made, stored and tested as hereinbelow described:
MIXING MMENT MORTAR.
1. The quantity of d ^y material to be mixed at one
time shall not exceed 1000 S. nor be less than 500 g. The pro-
portions of cement, or cement sad sand, shall be stated by weight
in grams of the dry materials; the quantity of mater shall be
expressed in cubic centimeters (l cc. of water - one g.). The
dry materials shall be weighed, placed: upon a non - absorbent sur-
face, thoroughly mixed dry if aaid is used, and a crater formed
in the center, into which the p :-oiler percentage of clean water
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s:all be poured; the material on the outer edge shall be turned
into the crater by the aid of a trowel. After an interval of 1/2
minute for the absorption of the -:hater, the operation shall be
completed by continuous, vigorous mixing, squeezing and kneading
with the hands for at least one minute. During the operation of
mixing, the hands should be nrote�,ted by rubber gloves.
In order to secure uniformity in the results of tests
for compression strength, the manner of mixing above described
should be carefully followed. At :.east one minute is necessary
to obtain the desired plasticity which is not appreciably affected
by continuing the mixing for several minutes. The exact time
necessary is dependent upon the personal equation of the operator.
The error in mixing should be on the side of over - mixing.
0 2. The temperature of the room and the mixin water
shall be maintained, as nearly as practicable, at 210c.t700F.)
Consistency of Mortar.
Fourteen per cent (141o) of water shall be used with
Ottawa Standard Sand.
To obtain the same consistency with the concrete sand,
a metal truncated cone four inches (411) in greatest diameter, two
inches (211) in smallest diameter, and six inches (611) high, shall
be used.
The consistency of the concrete sand mortar and that of
the Ottawa Standard Sand mortar shall be considered the same when
their respective slumps, made as above, are equal.
Compression Tests.
1. A cylindrical test piece 2 in. in diameter and 4 in.
in length is recommended for use in -making compression tests of
standard mortars. The.molds shall ba mar: cf non - corroding metal.
A satisfactory form of mold is shown i.n Fig. 1, Page 134, of
A,S.T;M. 1924 book of Tentative Standards. The ends of the mold
shall be parallel. The tubing used in the molds shall be of
sufficient thickness to prevent appreciable distortion. The molds
shall be oiled before using. ruri% the molding of the piece, the
mold shall rest on a clean, plane surface (preferable a piece of
plate glass which is allowed to remain in place until the mold is
removed).
2. The sand to be used shall be natural sand from Ottawa,
Ill., screened to pass a No. 20 sieve and retained on a No. 30
sieve. This sand may be obtained from the Ottawa Silicia Co.,
at a cost of three cents per pound, f.o.b. cars, Ottawa, Ill.
3. The sand, having passed the Yo. 20 sieve, shall be
considered standard when not more than 5 g. passes the No. 30
sieve after one minute continuous sieving of a 500 -g sample.
4. The sieves shall conform to the following specifica-
tions;
The No. 20 sieve shall have between 19.5 and 20.5 wires
per whole inch of the warp wires, and between 19 and 21 wires per
whole inch of the shoot wires. The diameter of the wire should be
0.0165 in. and the average diameter shall not be outside the
limits. of 0.0160 and 0.0170 in.
The No. 30 sieve shall have between 29.5 and 30.5 wires
per whole inch of the warp wires and between 28.5 and 31.5 wires
per whole inch of the shoot wires, The,diameter of the wire
should be 0.011 in. and the average diame-, ;er shall not be outside
the limits 0.0105 to 0.0115 in.
5. The mortar shall be placed in the mold in layers
about 1 in. in thickness, each layer being tamped by means of the
steel tamper shown in Fig. 2, p&.ge 134, of A.S.T.M. 1924 Rook of
Tentative standards. The weight of tamper shall be approximately
3/4 lb. In finishing the test piece, the mortar shall be heaped
above the mold and smoothed off with a trowel. As soon as the
test pieces from one sample are molded, the top of each test piece
shall be covered with a piece of glass vhich is brought to a firm
bearing on the fresh mortar. The cover glasses shall remain in
place until molds are removed
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• 6. Tests of standard mortar cylinders shall be made in
any testing machine which is adapted to meet the specified re-
quirements. The test pieces shall be tested as soon as removed
from the water. The ends of the nest cylinders shall be smooth
plane surfaced. The metal bearing plates of the testing machine
shall be placed in direct contact with the ends of the test piece.
During the test a spherical bearing block shall be used on top
of the cylinder. In order to secure a uniform distribution of
the load over the test cylinder the spherical bearing block must
be accurately centered. The diameter of the spherical bearing
block should be only a little greater than that of the test piece.
The test piece shall be loaded continuously to failure. The moving
head of the testing machine shall travel at the rate of not less
than 0.05 or more than 0.10 in. per minute.
7. Testing machines ,s:nould be frequently calibrated
in order to determine their accuracy.
8. Cylinders that are manifestly faulty, or which give
strengths differing more than 15 per cent from the average value
of all test pieces tested at the same period and made from the same
sample, shall not be considered in determining the compressive
strength.
Storage of Test Pieces
1. The moist closet may consist of a soapstone, slate
or concrete box, or a wooden box lined with metal. If a wooden
box is used, the interior should be covered with felt or broad
wickering kept wet. The bott>m of the moist closet should be
covered with water. The interior of the closet should be provided
with non - absorbent shelves on which to place the test pieces, the
shelves being so arranged that they me.. j be withdrawn readily.
2. All test pieces, immedi.ately after molding, shall be
placed in the moist closet for from 20 to 24 hours.
3. The briquettes shall be kept in molds on glass plates
in the moist closet for at least 20 hours. After from 20 to 24
hours in moist air the briquettes shall be immersed in clean water
in storage tanks of non - corroding material.
4. The air and water shall be maintained as nearly as
practicable at a temperature of 21 °C• (700F•)•
C. Method of Test for Decantation.
1. This method of test covers the determination of the
total quantity of silt, loam, clay, etc., in sand and other fine
aggregates.
2. The pan or vessel to be used in the determination
shall be approximately 9 in. (230 mm.) in diameter and not less
than 4 in. (102 mm.) in depth.
3. The sample must contain sufficient moisture to pre-
vent seeregation and shall be thoroughly mixed. A representative
portion of the sample sufficient to yield approximately 500 g.
of dried material shall then be dried to a constant weight at a
temperature not exceeding 100 0.6 (2300F).
4. The dried material shall be placed in the pan and
sufficient water added to cover the sample (about 225 cc.). The
contents of the pan shall be agitated vigorously for 15 seconds,
and then be allowed to settle for 15 seconds, after which the
water shall be poured off, care being taken not to pour off any
sand. This operation shall be repeated until the wash water is
clear. As a precaution, the wash water shall be poured through
a 200 -mesh sieve and any material retained thereon returned to the
washed sample. The washed sand shall be dried to a constant weight
at a temperature not exceeding 1000C. (2300F.) and weighed.
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• 5. The results shall be calculated from the formula:
Percentage of silt, clay, loam, etc.,
Original dry weight after ^ashinpg X 100
Original dry "weight
6. Then check determinations are desired, the wash
*pater shall be evaporated to dryness, the residue weighed, and the
percentage calculated from the formula:
V7,eight of residue x 100
Percentage of silt, loam, clay, etc. — Original dry weight
D. Method of Test for Sieve Analysis:
1. A representative test sample of the aggregate shall
be selected by quartering or by use of a sampler, which after
drying mill give not less than the following:
(a) Fine aggregate, 500 g.
b Coarse aggregate or a mixture of fine and coarse
aggregates, weight in grams, 3000 times size of largest sieve
required, measured in inches.
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2. The sample shall be dried at not over 110 °F (230 °F)
to constant weight.
3. (a) The sieves shall be of square —mesh wire —cloth
and shall be mounted on substantial frames constructed in a manner
thet will prevent logs of material during sifting.
(b) The size of wire and sieve openings shall be
as given in Table 2.
4. (a) The sample shall be'separated into a series of
sixes by means of the sieves specified in paragraph 3 above.
Sifting shall be continued until not more than one (1) per cent
by weight of the sample passes any sieve during one (1) minute.
(b) rEach size shall be weighed on a balance or scale
which is sensitive to 1 /1000 of the weight of the test sample.
(c) The percentage by weight of the total sample
which is finer than each of the sieves shall be computed.
5. (a) The percentages in sieve analysis shall be
reported to the nearest whole number.
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Sieve Opening
Fire.
Diam.
Tolerance
per
cent.
Sieve
Tire
Maxi —
No, or
Avg:
Diam.
mum
Size in
opng.
Und.
Over
open —
Inches
mm.
mm.
mm.
in.
inR
No.100
.0.149
0.0059
0.102
MOO— —
6
15
35
40
No. 30
0.59
0.0232
0.33
0.0130
5
15
30
25
No. 4
4.76
0.187
1.27
O.OEO
3
15
30
10
No. 3
6.680
0.263
1.78
0.070
3
15
30
10
3/8 in.
9.5
0.375
2.33
0.092
3
10
10
10
2. The sample shall be dried at not over 110 °F (230 °F)
to constant weight.
3. (a) The sieves shall be of square —mesh wire —cloth
and shall be mounted on substantial frames constructed in a manner
thet will prevent logs of material during sifting.
(b) The size of wire and sieve openings shall be
as given in Table 2.
4. (a) The sample shall be'separated into a series of
sixes by means of the sieves specified in paragraph 3 above.
Sifting shall be continued until not more than one (1) per cent
by weight of the sample passes any sieve during one (1) minute.
(b) rEach size shall be weighed on a balance or scale
which is sensitive to 1 /1000 of the weight of the test sample.
(c) The percentage by weight of the total sample
which is finer than each of the sieves shall be computed.
5. (a) The percentages in sieve analysis shall be
reported to the nearest whole number.
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GRAVEL OR BROKEN STONE
Coarse Aggregate shall be sound crushed rock, or
washed gravel, or combination ow both. -Phe particles of coarse
aggregate shall be of clean, hard, tough, durable material, free
from vegetable or other deleterious substances. It shall be
free from dirt, mud, or stone dust.
Coarse aggregate as furnished shall be uniformly graded
from the largest to the smallest screen sizes given below, and
in addition shall conform to the following tests:
GRADI NG :
Then analyzed by laboratory screens and sieves, coarse
aggregate for use in concrete pavements or concrete base six
inches or over in thickness, shall conform to grading requirements
as follows;
Passing screen having 3 1/2+' circular openings 1004 by.wt.
"
it " 2 1 /2+' '+ + 90 to 100% is +'
1 1/21, 0 u 60 to 80°lo n 1,
3A is n „ 30 to 501, +' p
No.3" 01, to 51, " +'
Coarse aggregate for use in concrete pavement less than
six (6) inches in thickness and in curbs and sidewalks shall
conform to grading requirements as follows:
Passing screen having 1 1/2+' circular openings 1004 by wt.
n n it 3 /411 n n 3 0% 1, n
to 65?%
No. 3 Screen C4 to 5°4 +' it
Gravel shall not show a loss of more than thirty —two
(32) per cent and broken stone shall not show a loss of more than
twenty —two (22) per cent when subjected to the rattler test
hereinafter specified.
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RATTLER TEST_
At least thirty (30) po.n�;3 of the material to be tested
shall be available for the test. E =�'h s�mpie when ready for the
rattler shall consist of five (5) kilograms (eleven pounds) of said
material, and shall pass a two and one -half inch screen, sixty
per cent, by weight, shall be retained on a three - quarter inch
screen, and all shall be retained on a one -half inch screen. The
said sample shall be tested in a rattler consisting of a metal
cylinder 28 inches in diameter and twenty inches in length,
longitudinally mounted on a horizontal shaft and having a shelf
four inches wide extending from end to end.
During the test the rattler shall be revolved at a rate
of between 28 and 30 revolutions per minute. A charge for the
rattler shall consist of the said five kilogram sample and four-
teen cubical blocks of cast iron with rounded corners and edges,
said blocks measuring about one and one -half inches in each
dimension and having a weight of five kilograms. After receiving
the charge; the rattler shall be given five hundred revolutions.
The sample shall then be screened and the portion,by weight,
which will pass a 10 -mesh screen, '.which shall be considered and
designated as the loss.
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RATER
Rater shall be clean, free from oil, acid, alkali or
• vegetable matter. The amount of ?eater to be used in a batch shall
not be less than 5.8 nor more than. 6.00 gallons per sack of port-
land Cement, which includes water already in the concrete materials,
and in measuring the Mater, allowance shall be made for water
contained in said materials.
MEASURING MATERIALS
The sand or stone screenings and the gravel or broken
stone shall be measured in boxes which shall have the capacity
necessary to accurately maintain the proportions hereinbefore
mentioned. Said material shall be measured loose, without shaking
or compacting.
Cement in sacks as above specified shall be dumped di-
rectly into the mixer. The water necessary for every batch shall
be accurately measured with an apparatus which will prevent the
use of more water than above specified. No mixer shall be used
which is not provided with an accurate water measuring device or
apparatus.
DEPOSITING CONCRETE MATERIALS.
Under these specifications the Contractor will not be
permitted to deposit or store any sand, gravel or broken stone
directly on the sub - grade. He may, however, plank the sub -grade
and deposit or store the concrete materials thereon, provided
that the planks are laid in such a manner that they are tight
and will not permit the material of which 1;he sub -grade is com-
posed to work up and become mixed with the concrete materials.
MIXING CONCRETE.
All mixing of concrete for the pavement shall be done
in a batch mixer.
The mixer shall be nharged with cement and sufficient
sand exz52tzm 8ZZTX=zk%= and gravel or broken stone to conform to
the proportions hereinbefore stated. Sufficient water, not in
excess of the quantity above specified shall be added to produce
• plastic or quaking cbncrete which can be handled without causing
• separation of the coarse aggregate from the mortar. The mixer
drum shall have a speed of not less than 13 revolutions per
minute, and every batch of concrete shall be mixed in the drum
of the mixer not less than sixty (60) seconds before any portion
of the batch is discharged from the said drum. At lease 75
seconds must elapse between the placing of successive batches
in the mixer.
CONSISTENCY OF CONC
The concrete, after being mixed a., hereinbefore speci-
fied, shall, when subjected to the following test, have a slump
of not less than eight per cent nor more than twenty per cent.
The slump test shall be made in the following manner: The test
tube to be used in making the slump test s_iall have an inside
diameter of eight inches at the base and -Ai inside diameter of
four inches at the top, and a perpendicula:c height of twelve
inches. Immediately after the c;a orate has been mixed and
deposited on the sub - grade, a sufficient quantity thereof shall
be placed in four layers in the tapered test tube until the con-
crete is flush with the top of zhe tube, each layer shall be
thoroughly settled by working with a pointed iron rod. Then the
test tube shall be lifted, allowing the concrete to settle or
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• slump. After the pile of concrete has set one minute, its height
shall be measured end subtracted from the original height of
• twelve (12) inches, which difference in height is the amount of
the slump in inches from which the percentage of slump shall be
determined.
TESTS 07 CONCRETE
The concrete composed of the materials, proportions,
consistency, mixing, etc., provided for in these specifications
must be of such quality and character of workmanship that it will
have an ultimate compressive strength of not less than 3,000
pounds per square inch, or an ultimate modulus of rupture of not
less than 600 pounds per square inch.
The test specimen for determining compressive strength
shall consist of a cylinder of the concrete to be tested 6 inches
in diameter, and 12 inches in height. The test specimen for de-
termining modulus of rupture shall consist of a beam of the con-
crete to be tented, 6 inches in width, 6 inches in thickness and
36 inches in length.
Samples of the concrete to be tested shall be taken
immediately after the concrete has left the mixer and deposited
on the sub - grade, and molded into the test specimens above men-
tioned. The concrete shall be thoroughly rodded and care taken
to remove air pockets. The freshly made test specimen shall be
struck off and troweled level with the top of the mold. The test
specimen, after molding, shall be covered to protect same from
injury, and buried in damp sand,and at the end of 48 hours the
mold shall be removed and the test specimen covered with sand or
earth and maintained in a continuous damp condition for a period
of ten (10) days. At the end of twelve (12) days from the day of
molding the specimen, it shall be uncovered and air -cured for
sixteen (16) days, and tested at the end of twenty -eight (28)
days.
PLACING CONCRETE.
The concrete shall be spread upon a thoroughly dampened
sub -grade propared as herein described. The concrete shall be
tamped until mortar appears on the surface Such devices and
methods shall then be used as are necessary to bring the surface
of the concrete to a true and even grade and to the established
cross - sections.
FINISHING THE SURFACE OF THE CONCRETE PAVEMENT
After the surface of the concrete pavement has been
struck off to the proper cross - section, it shall be finished by
rolling and floating in the following order and manner:
The roller shall be made of smooth steel, 12 inches in
diameter and six feet in length, and of a weight not to exceed one
pound per inch length of roller. The roller shall be operated by
ropes so designed and used as neither to increase nor decrease
the pressure coming upon the concrete from the roller. Immediately
after the surface of the concrete pavement has been struck off
with a template, it shall be rolled four times. The time interval
between rollings to be not less than 20 minutes nor more than
40 minutes. The roller at each rolling shall be operated at such
an angle with the center line of the pavement that it advances
along the pavement two feet for each time across.
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After the rolling has been completed, the surface of the
concrete pavement shall be finished +with a float eight inches in
width and of a length two feet greater than the width of the
• pavement being laid, constructed of mood and surfaced at the bottom
and edges. It shall be sufficiently flexible so that it rill
adapt itself to the cross - sect' -on ;f th:? pavement to be laid.
The said float shall be operated .r.tsveisely across the pavement,
advancing longitudinally alon(T the pavement in such a :canner that
the crone will not be Torked out of the pavement, resulting in a
smooth and unifo °M surface.
After the transverse floating has been completed, the
surface of the concrete pavenont sliall be finished with a float
sixteen feet in length and not less than eight; inches in width,
constructed of wood and surfaced at the bottom and edges, and it
must be braced sufficiently that it will not spring out of shape,
but maintain at all times a uniform and true surface. There shall
be attached to the float, wooden handles at each end, by which
the float shall be operated from bridges which shall span the
width of the pavement being laid, excepting that for pavements
Crider than 28 feet, the pavement may be laid in two or more
sections of equal width, but the midth of any section laid shall
not be less than 14 feet.
The floating shall be commenced at one edge of the
pavement and continue across to the opposite edge and be operated
by using short longitudinal strokes, combined with a slight
transverse motion, in such manner that the cor*,vm will not be worked
out of the pavement, nor to permit the edges of the float to dig
into the surface, so that there will result a smooth, true and
uniform cross - section, as mell as a true and uniform surface
longitudinally-
RE-MIXING OF CONCRETE
No concrete shall be used that shoT*s evidence of having
set, or that has become unfit for good To-ek from standing too long
or from any other cause, and no re- mixing of concrete will be
permitted.
FINISHING EDGES OF FAVVIENT
The edges of the concrete pavement in cases where it
does not join to a curb, shall be rounded to a radius of one inch,
after the floating and rolling has been completed, as above
specified.
FORMS
Forms shall be true and straight, free from warp and of
sufficient strength to resist springing out of shape. All mortar
and dirt shall be removed from forms that have been previously
used. They shall be well staked or otherwise held to the es-
tablished line and grade, and their upper surface shall conform
tith the finished surface of the concrete pavement. All forms
shall be wet thoroughly before any material is deposited against
them.
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EXPANSION JOINTS
• Expansion joints shall be pla ^ed for the full width and
depth of the pavement at the termination of each day's work, and
at all other places where Indic c::, -'.-he plans, profiles and
cross - sections. Said expansior. join' FiY.c. ?_ be formed by using a
wooden templet, one inch thick ac th.e bottom and tapering to one
and one -half inches in thi- l "ness at %.. 'ie top, and of a depth equal
to the thickness of the pavement. The top surface shall.be shaped
to conform to the surface o.'_ the finished pavement. It must
remain in place until the concret-o has taken its initial set.
The edges of the concrete pavement along each side of the
expansion joint shall be finished with an edging tool having a
radius of one -half inch. Care must be exercised in placing and
finishing the pavement at expansion joints so that there will
result a true and uniform surface longitudinally.
After the pavement has been cured, all earth, dirt, sand
and foreign material of any nature shall be removed from the
expansion joint, and the space filled with a composition of asphalt
and saw dust.
The mixture shall consist of not less than 12 per cent,
nor more than 16 per cent by volume of asphalt cement and from
82 per cent to 88 per cent by volume of dry saw-dust.
The asphalt cement muse be homogenous, and its consist-
ency at the time of using must fall within the limits of 60 and
80 degrees penetration by the District of Columbia standard. It
shall be heated to a temperature of from 200 to 250 degrees
Fahrenheit, after which it shall be mixed thoroughly with the saw
dust. The mixture prepared as above &jEcribed shall then be
placed in the joints and shall not be ccol:r than 200 degrees
Fahrenheit. The entire expansion joi t sha ?.1 be filled and the
mixture compacted thoroughly and finished -".r.sh with the surface
of the pavement.
All contraction cracks developin in the concrete pave-
ment before the acceptance of tho work mus..be filled by the
Contractor with asphalt as above specified, flush with the top
surface of the pavement.
PROTECTING AND CURING
The surface of the concrete pavement shall be sprayed
with water as soon as the concrete is sufficiently hardened to
prevent pitting, or it :nay be covered with canvas which must be
kept moistened, and shall be kept wet or covered until an earth
or sand covering can be placed upon the surface of the concrete,
(the depth of the earth or sand eowe_ing to be not less than one
inch) which shall be done as soon as possible without damaging the
concrete surface.
After the covering of earth or sand has been placed,
dams of earth or sand shall immediately be built along both edges
of the pavement and across the pavement at frequent intervals, and
the pavement between the dams be covered with not less than two
inches depth of +*!.ter for s period of fourteen days, after which
the earth dams can be removed. Yo traffic shall be allowed on
the pavement until fourteen days after the curing above described
has been completed.
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CONCRETE CURB
Concrete curb shall br� crn.rtructed along such portion
of the work, and of the size and sht -pe bho.m upon the plans. It
shall be placed upon a sub -gxane prepared. as hereinbefore described
under the heading of 6radi.ng, and thoroughly dampened. The body
of concrete curbs shall consist of concrete having a slump of not
less than 15 per cent nor more than 25 per cent and be composed
of the following materials, and said materials shall conform to
the requirements, as hereinbefore specified, to -wit:
1: Portland Cement - one part by measure.
2: Sand or Stone Screenings - two parts by measure.
3: Gravel or Broken Stone - four parts by measure.
The mixing of the concrete shall be done as hereinbefore
specified.
(a) Forms: Planks used for forms shall be of a width
equal to the deptli—of the curb and shall be two inches in thick-
ness. warped planks and planks not having a smooth, straight
upper edge shall not be used. The curb planks shall be rigidly
held in place by the use of not less than five pairs of iron
stakes to each 21 foot section of curb. All curb forms must be
carefully set to proper alignment and gTade. Curb forms shall not
be removed from the concrete in less than one hour after the con-
crete has been tamped into place, and the back form shall not be
removed until the face of the curb has been plastered.
(b) Plasterin and Finishing: The top of the curb
shall be plastered wi h a 1 2 inch coal: of cement mortar, as soon
as the concrete has been thoroughly tamped, the back and face of
the curb shell receive 1/2 inch coat nT cement mortar as soon as
the forms are removed, the back to a depth oz four inches from the
top of the curb, and the front to a depth of 10 inches from the
top of the curb, a4 f.z;.:.therwise eho*wn upon the plans. The
cement mortar shall consist of one s.=ck of Portland Cement to one
and one -half cubic feet of sand previously screened to remove all
particles retained on a 1/4 inch screen, and 1/4 pound of lamp
black per sack of cement, and mixed thoroughly until the mortar
is of a uniform color. The mortar shall be mixed in a concrete
mixer in the manner specified for concrete. The mortar must be
used immediately after mixing and no re- tempering will be per-
mitted. The plastered surface of the curb shall be well floated
and troweled into the body of the curb before the concrete has set,
It shall be smoothly polished end marked with joints at right
angles to the curb grade, into blocks three feet in length.
(c) The curb shall be divided into sections twenty -one
feet in length. These sections shall be separated completely by
a joint not less than 3/8 inch nor more than 1/2 inch in width.
The joint shall be filled with a suitable elastic water-
proof compound of asp'_-1t or ta-_ and felt that will not become
soft and run in hot leather, or h:rd and brittle and chip out in
cold wee.ther:
(d) CCurrinn&: The curb shall be cc,-ered with earth or
sand as soon as the concrete and mortar finish hr.ve set sufficient-
ly to permit this to be done without injuring or marring the
surface, and shall re-,:iain covered and shall be kept wet con-
tinuously for ten days.
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CONCRETE SIDET9'ALK
Concrete sidewalk shall be constructed along such por-
tion of the work, and of the size and shape shown upon the plans.
It shall be placed upon a sub -grade prepared as hereinbefore
described under the heading of Spading, and thoroughly dampened.
The base of the concrete sidewalk shall consist of concrete hav-
ing a sli}mp of not less than 15 per cent, nor more than 25 per
cent, and be composed of the following materials, and said
materials shall conform to the requirements as hereinbefore
specified, to -Tait:
1: portl -nd Cement - one pert by measure.
2: S ^nd or stone screenings - two p,-its by measure.
3: Gr ^.vel or broken stone - four ports by measure.
The mixing of the concrete shill be done as herein -
before specified.
DIMENSIONS
Concrete sidewalks shill be constructed of a cement
concrete body, which shall be three (3) inches in thickness after
being thoroughly compacted, and a cement mortar finishing coat
whidL shall be one -half (1/2) inch in thickness, finless otherwise
,*own on the above mentioned plans, drawing and profiles.
FORMS .
Forms shall be true and straight, free from -arp, and
of sufficient strength to resist springing out of shape. All
mortar and dirt shall be removed from forms that have been pre-
viously used.
The forms shall be well staked or other wise held to
the established line and grade, and their upper surface shall
conform with the finished surface of the concrete sidewalk.
All forms shall be thoroughly wet before any material
is deposited against them.
Strips used as forms at the sides of the walk shall be
not less than two (2) inches in width, nor less than three and
one-half inches (3 1/211) in death.
CONSTRUCTION
The surface of the sidewalks shall be divided into
sections two and one -half (2 1/2) feet in length, measured along
the sidewalk parallel to the street lines. These sections to be
marked with a jointer, at least one - quarter inch in depth alon�
lines at right angles with the sidewalks. At every twenty (20
feet in length or every eighth section, the sidewalk shall be
Cor:T;letely separated from the adjacent sidewalk, by some method
which will insure complete separation, by a joint not less than
three - eighths (3/8) nor more than five- eighths (5/8) of an inch
wide. These joints must be cut straight and true to a line, and
at right angles with the outside edbe of the sidewalk..
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CEMENT MORTAR FINISH
• PROPORTIONS: Cement mortar finishing coat shall be
composed of: One (1) part of 'Portland Cement; and one and one -
half (1 1/2) parts of sand or st.cne nc:reenings.
MIXING: Mixing shall be done in water -tight mortar
boxes, In the process of mixing the mortar, the materials shall
be thoroughly mixed by turning at 1-.art three times dry. A
sufficient quantity of lamp black, (114 pounds per sate of cement)
shall be mixed dry with the sand and cement, until the mixture is
of ,a uniform color. It shall then b- wet, with sufficient water
to produce a consistency which will not require tamping, but
which can be easily spread into position, turned twice and im-
mediately put in place as hereinafter described.
DEPOSITING: Arearing surface shall be placed immediately
after mixing, and in no case shall more than fifty (50) minutes
elapse between the time the concrete for the body of the sidewalk
is mixed and the time the wearing surface is placed.
The surface of the finishing coat shall be well floated
and thoroughly and smoothly troTeled into the body of the concrete
so as to form one compact, mass, free from voids or loose spaces,
and shall then be smoothly polished. The finished work must show
an even, true surface free from sags, humps, pits or other defects.
Then a straight edge five (5) feet in length is laid upon the
surface at any point, except at grade changes, the surface shall
at no point vary more than one - quarter of an inch from the true
edge of the straight edge.
Wherever the sidewalk is laid upon a grade of five (5)
per cent or more, it shall be finished mi':h a floated surface.
Wherever the sidewalk construotec under these specifi-
cations does not cover the ent9.re sidewalk such uncovered
portion shall be brought to grace and lef-; i.n a finished condition.
The application of neat eemen'3 to the surface in order to
hasten hardening is prohibited.
CONTRACTOR'S NAME STAMP: The Contractor shall stamp
his name on all work dons by him at intervals of not more than
one hundred feet on continuous work, and not less than once on
each job of less than one hundred feet in length. The letters
shall not be smaller than three - quarters of an ich in height,
and of proportional width. They must ba sunken and of a depth of
not less than one - quarter of an inch.
PROTECTION: when completed, the side ^alk shall be
covered with earth or sand to a dep''h of not less than one (1)
inch, and kept covered and wet continuously for a period of not
less than ten days.
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r.. GENERAL RE UIREiiNTS
The Contractor shall, for the price bid, furnish all
the materials to execute the wort in every respect in a thorough
and workmanlike manner, in accorJ.ance with the plans and speci-
fications, and to the satisfaction cf the Street Superintendent.
NATER!AL°_A_D SUPLES
All materials must be of speolfied quality and fully
equal to the samples, when samples vre required. The Contractor
shall furnish to the Engineer for test, whenever called for and
free of charge, samples of all materials proposed to be used in
the work. Rejected material must be immediately removed from the
work by the Contractor.
LABOR
Any overseer, superintendent, laborer or other person
employed by the Contractor on the work, 7ho shall perform work
in a manner contrary to these specifications, shall be discharged
immediately and such person shall not again be employed on the
work.
EXAMINATIO? 0' GROUND
Bidders must examine and judge for themselves as to the
locetion of the proposed work, and the nature of the excavation
to be made and the work to be done
SETTING STAKES.
The Contractor shall eive 24 hours notice in writing
when he will require the setvices of the Engineer for laying out
any portion of the work.
He shall dig all stake holes necessary to give lines and
levels. The Contractor shall preserve all stokes set for the
lines, levels or measurements of the work in their proper places
until authorized to remove them by the Engineer, and any expense
incurred in replacing said stakes which the Contractor or his
subordinates may have failed to preserve shall be borne by the
Contractor.
PLANS AND SPECIFICATIONS
The Contractor shall keen upon the work a cony of the
plans and specifications, and access thereto shall at all times
be accorded the Engineer or Inspector.
INSPECTORS
0
The Contractor shall prosecute work only in. the presence
of an Engineer or Inspector, appointed by the Street Superintend-
ent, and any work done in the absence of said Engineer or Inspector
will be subject to rejection. The Contractor shall furnish the
Engineer and Inspector reasonable facilities for obtaining such
information as may be necessary to give them full information at
all times respecting the progress and manner of the work and the
character of the materials.
PRESERVATION OF MONMENTS .
The Contractor shall not distUb any monuments or stakes
found on the line of improvements, until ordered. by the Engineer,
and he shall bear the expense of re- setting any monuments or stakes
which may be disturbed without ozdcrs.
REYiOVING OBSTPUOTIONS
The Contractor shall re:mu7e all trees, stones, debris,
and other obstructions that "o , bw :... ;ouptuyed in making said
improvements.
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OBSERVING CITY ORDINANCES.
The Contractor shall observe all the Ordinances of the
City of Newport Beach in relation to the obstruction of streets,
• keeping open passageways and pr.otucting the same There they are
exposed or dangerous to travel.
BARRIERS, LIGHTS, ETC.
The Contractor shall take all necessary measures to
protect the work and prevent accidents during construction. He
shall maintain and provide all necessary barriers, guards, tem-
porary bridges, watchmen and lights.
PUBLIC UTILITIES
In case it should be necessary to move the property
of any owner of a public utility or franchise, such owner gill,
upon proper application by the Contractor, be notified by the
Street Superintendent, to move such property within a specified
reasonable time, and the Contractor ohall not interfere with said
property until after the expiration of the.time specified.
The right is reserved to the owners of public utilities
and franchises to enter upon the street for the purpose of making
repairs or changes of their property that may be made necessary
by the work. The City shall also have the privilege of entering
upon the street for the purpose of repairing culverts or storm
drains.
LOSS OR DAMAGE
4L
All loss or damage arising from any unforseen obstruction
or difficulties, either natural or artificial, which may be en-
countered in the prosecution of the work, Pi from any action of
the elements, or from any act or omission not authorized by these
specifications, on the part of the Contractor, or any agent or
person employed by him, shall be sustained by the Contractor.
DEFECTIVE WORK
Yo work Qich may be defective in its construction or
deficient in any of the requirements of these specifications will
be considered as accepted in consequence of the failure of any
officer of the City, or Inspector connected with the cork, to
point out said defect or deficiency during construction, and the
Contractor shall correct any imperfect work, whenever discovered,
before the final acceptance of the rork.
PROTECTION OF 7ORK AND CLEANING UP
The Contractor shall care for all work until final com-
pletion and acceptance. He shall romove all surplus material and
rubbish from thework after its completion and before he makes
J application for the acceptance of the work.
FINAL INU CTION
The Contractor shall notify the Stxeet Superintendent
nhon he desires a final inspection of the work, when the lattor
will, .n.s soon as possible, made thenece.ssary exaninstion, and if
04a work is found in compliance with these specifications, the
Street Superintendent will furnish the Contractor with a certifi-
caTe to that effect.
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ALLOWABLE VARIATION
• Then in these specifications a maximum or minimum,
either in size, percentage or thickness, or relating to quality or
character, or other matter, is allc -ed or prescribed, the work
shall be accepted as in compliar.se therewith if within such max-
imum or minimum so allowed here).
DEFINITIONS
'Whenever the word "City'' is used in these specifications
it refers to the City of Newport Beach, California.
whenever the word "Contractor" is used in these specifi-
cations, it refers to the party or parties of the second part in
the agreement for the construction of the work herein specified.
Whenever the words "Superintendent" or "Engineer" are used
in these specifications, they refer respectively to the "Street
Superintendent" or "City Engineer" of the City of Newport Beach,
or their authorized agents or inspectors.
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The City Clerk shall certify to the passage of this
resolution and shall cause the same to be entered in the Book
of Resolutions, and a Minute of the passage thereof in the Record
of the Board of Trustees of the mceoting at TMrhich it was passed.
Passed and approved. this . " °', day of
1925.
President of the Board of Trustees
ATTEST:
City Clerk.
STATE OF CALIFORNIA )
COUNTY OF ORANGE ( Be.
CITY OF NEWPORT BEACH)
I, City Clerk of the
City of Newport Beach, do hereby certify that the foregoing Res-
olution, being Resolution No. ,?46 , was adopted by the Board
of Trustees of said City, signed by the President of said Board,
and attested by the City Clerk, all-4t a regular meeting thereof
held on the - n d day of A/pA- er , 1925, and
that the same was adopted by the followin6 rot -moo -wit:
AYES: Trustees,
NOES: Trustees,
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ABSENT: Trustees. u -
City Clerk of the City of Ne^woort
Beach.
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