CC RESOLUTION 27RESOLU'TIOi: TdOw 27
A RESOLU1IOD OF 2HE BOAkD OF 1RUSTEES Oi' 'TEE CI`T'Y
OF EL SEGUNDO, CALIFa -u,IA, ADOP'TIiTG 62ECIFICATIO113
i,VIBER 4 FOR THE CW6TRU01JOiI Olt CONCxL4311E
PAVr t" &,, TS.
BE IT RESOLYED by the Board of Trustees of the City
of E1 Segundo, California, that the following specifications,
to be known as Specifications dumber 4 for the con-
struction of concrete pavements within the City of El Segundo,
oe and the same are hereby adopted.
SECTION 1. GENERAL R121QUIR&LENTS: All work shall
be executed in every respect in a thorough and workmanlike
manner. The Contractor shall preserve all stakes set for the
lines, levels or measurements of the work in their proper
places until authorized to remove them by the City ingineer,
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.
Any overseer, superintendent, laoorer, or other person
employed on the work by the Contractor, who shall perform his
work in a manner contrary to these specifications, shall be
discharged immediately and such person shall not again be em-
ployed on the work. All loss or damage arising from any unfor-
seen obstruction or difficulties which may be encountered in
the prosecution of the work, or from any action of the elements,
or from any act or omission, not authorized by these specifica-
tions, on the part of the Contractor, or any agent or person
employed by him, shall oe sustained by the Contractor.
No work which may be defective in its construction
or deficient in any of the requirements of these specifications
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will be considered as accepted in consequence of the
failure of any officer of the city or Inspector connected
with the work to point out said defects or deficiency during
construction, and the Contractor shall correct any imperfect
work, whenever discovered, before the final acceptance of
the work.
The Contractor assumes all risk of variance in any
computation or statement of amounts of quantities necessary
to complete the work required by this contract, and agrees
to furnish all necessary labor and materials, and to fully
complete said work in accordance with the plans and specifi-
cations, and to the satisfaction of of the Superintendent of
Streets.
Bidders must examine and fudge for themselves as to
the location of the proposed work, the nature of the exca-
vation to be made, and the work to be done.
The Contractor shall give twenty -four (24) hours'
notice in writing when he will require the services of the
City Engineer for laying out any portion of the work. He
shall dig all stake holes necessary to give lines and levels.
The Contractor shall not disturo any monuments or
stakes found on the line of the improvements until ordered by
the City Engineer, and he shall bear the expense of resetting
any monuments or stakes which may be disturbed without orders.
The Contractor shall remove at his own expense all
obstructions, such as trees, stones, debris, etc., that
may be in the way of making the proposed improvements.
No more than one cross street shall oe closed at
any one time.
The Contractor shall observe all the Ordinances of
the City of El Segundo, in relation to the obstructions of
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streets, keeping open passageways, and protecting the
same where they are exposed and would be dangerous to
public travel.
He shall also erect and keep erected, by day and night,
a fence or proper oarrier along the line of the work and
across the ends of the same, in order to guard the dublic
effectively from danger of falling into trenches, or from
upsetting their vehicles against the earth thrown u2 during
the progress of the work, and he shall post all proper notices
and signals to the public of the state of the street while
the work is in progress.
A red light must be maintained at night at each end
of the barriers, from sunset until sunrise, and a watchman
employed as additional security whene-er the same may be
needed.
In case it should be necessary to move the property of
any owner of a public utility or franchise, such owner will,
upon proper a_)plieation by the Contractor, be notified by
the Street Superintendent to move such property within a
specified reasonable time, and the Contractor shall not inter-
fere 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 become
necessary by the work. The City shall also have the
privilege of entering upon the street for the purpose of
repairing sewers, or making house -drain connections there-
with, or repairing culverts or storm drains.
The Contractor shall remove all surplus material and
rubbish from the work after its completion, and before he
mazes application for the acceptance of the work.
The Contractor shall notify the Street Superintendent
when he desires a final inspection of the work, when the
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latter will, as soon as possible, make the necessary
examination, and if the work is found in compliance with
the aoove specifications, the Street Superintendent will
furnish the Contractor with a certificate to that effect.
Whenever the word "Contractor" is used in these speci-
fications it refers to the party or parties of the second
part in the agreement for the construction of the work
herein specefied.
Whenever the words "Street Superintendent ", or "City
Engineer ", are used in these specifications, they refer
respectively to the Street Superintendent or the City
Engineer of the City of E1 Segundo, or their authorized
agents or inspectors. When in the specifications a maximum
and minimum, either of size, percentage or thickness, or
relating to quality or Ohgracter, or other matter is allowed
or prescribed, the work shall be accepted as in compliance
therewith, if within such maximum or minimum so allowed hereby.
The Contractor shall supply all materials of whatsoever
nature necessary to complete and finish the work.
SECTION 2. HATERIALS: Cement where specified,
shall be Portland Cement, shall be received on the job in
sacks filled at the cement factory and each containing not
less than ninety -four (94) pounds net, of cement. Said
sack of cement shall be deemed to have a volume of one (1)
cubic foot. The City Engineer shall have authority to
require any lot of cement to be held in storage until seven
day tests can be completed, where the cement is of a brand
not previously tested by him, or where previous samples of
the same brand tested by him have fallen below the require-
ments herein set forth. The 3oard of 2uolic Plorks shall
nave the authority to require the reconstruction of work in
which cement has oeen used which subsequent tests show to be
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not in conformity with requirements. All cement
shall meet the following requirements, and shall be
tested therefor in accordance with Specifications C
9 -17 of the American Society for Testing :,Materials.
(a) Fineness. The residue on a 200 -mesh
screen shall not exceed twenty -two (22) per cent by
weight.
(b) Soundness. A pat of cement paste aoout three
(3) inches in diameter and one -half (1`2) inch in thick-
ness at the center, tapering to a thin edge, stored in
moist air for twenty -four (24) hours, and then kept in
an atmosphere of steam at ninety -eight (98) to one hundred
(100) degrees Centigrade for five (5) hours, shall show
no signs of distortion, cracking, checking or disiute ration.
(c) Time of getting. The Cement shall not develop
initial set in less than forty -five (45) minutes when tested
with a 7icat needle, nor in less than sixty (60) minutes
when tested with a Gilmore needle. Final set shall oe
attained within ten (10) hours.
(d) Tensile Strength. The average tensile
strength in pounds per square inch of not less than
three (3) mortar oriquettes, composed of one (1) part by
weight, of Cement and three (3) parts, by weight, of
Standard Ottawa sand, shall be not less than the following:
iE Sam MMY
Test Storage of 3riquettes Lbs. per Sq. In.
7 days, 1 day in moist air, 6 days in water 200
28 " , 1 day in moist air, 27 days in water 300
Me avera;e tensile strength in twenty - eight
(26) days shall oe greater than the avera•e tensile sues tii
in seven (7) days.
C0!CKE2i d&zL: Sand for concrete work shall not
contrain more than three (3) per cent oy wez nt of mica.
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The sand shall not lose more than five (5) per
cent oy weight, when tested for clay and silt, in
the manger provided for in these specifications.
not less than ninety (90) percent, oy weight,
shall pass a 1/4 inch screen; at least lefty (50)
per cent, but not more than ei;hty -five (85) per
cent, oy weight, shall oe retained on a 30 -mesh
screen. An average of three (3) briquettes, one
inch square in section, made of one (1) part Portland
Cement, conformity to these specifications, and three
(3) parts of concrete sand, shall attain a minimu:
tensile strength In seven (7) days equal to ninety
(90) per cent of the avera,;e tensile strength of
three lice oriquettes of the same proportions, made
with the same cen.ent and 3 tandard Ottawa band.
CUSNIX S!jD: Nand for cushion under concrete
on adooe and other swelling soils small contain less
than ten (10) per cent, oy weiSht, of silt and shall
all pass a 1/2 inch screen.
ii..iMu e!LD x'03 jIll 02 C!"Y: `resting sand
for silt or clay shall oe done in the followin;; >>ianner:
One (1) kilogram of dry sand shall is placed in a
sixteen (lei) inch standard gold pan, c3vered nearly
to the rin with crater, stirred and agitated gently but
thoroughly with the hand and allowed to settle for
thirty (30) seconds. The water shall ten be poured
off uniformly in fifteen (15) seconds. This washing
process shall be repeated until immediately after
stirring, standard six (6) point news print may be
ea.i ly read through five (5) centimeters of water.
The water small then be drained off, the sand dried
and weighed, and the loss determined by the difference
in the weight.
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GROEL 0 _,� 3ROK> i' 620x1Z: Gravel or broken stone
shall consist of clean, hard, water -worn peobles,
crushed ooulders or both and shall all pass a two (2)
inch mesh screen, i,ot less than thirty -five (35),
nor more than fifty (50) per cent, by weight, shall
pass a 1`4 inch mesh screen. The coarse agareoate
shall range in size from 1/4 inch to two inches in
greatest dimension and no intermediate sizes shall oe
removed. It shall all consist of clean, hard, tough,
durable rock of a quality satisfactory to the Street
Superintendent.
.1AT:R: All water used in mixing concrete shall
be clean, free from oil, organic or other deleterious
matter. When a mechanical mixer is used all water shall
be measured with an accurate water measuring device.
HEADLRS: Whenever the pavement does not terminate
against a curb, gutter or other pavement, the Contractor
shall provide and lay upon the line of said termination,
a header of sound plank two (2) inches in thickness, and
of a width not less than the thickness of the pavement.
The top edge of the plank shall conform with the street
cross section when finished. Said headers shall be con-
sidered a necessary part of the pavement and shall re-
main in place until replaced by permanent improvement,
unless otherwise noted on the plans for the pavement.
. .5011, 13 OR SID.& 312RIPS: The forias shall be of
two (2) inch sound timber free from warp, the thickness
of the pavement, one edge planed straight. They shall
be set true to the required lines and grades, and held
in place by stakes of such size and length and set at
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such intervals as may be necessary to insure
rigidity, The forms are not to be removed, but
are to remain as part of the completed work. The
forms shall be thoroughly wetted or oiled before
any concrete is deposited against them.
Whenever it is necessary to stop work, even
at noontime, the work must be completed up to a form
placed across the road bed.
SECTION 3. ROUGH GRUING: Shall include all
filling, the removal of all earth, stone or other
material of whatever nature it may be, that may be
encountered in preparing the street for the improve-
ments to be made. Plowing or excavating sound
material shall not be done to a depth greater than
six (6) inches below pavement subgrade, or the finished
grade where no pavement is to be constructed. Uot
more than one -half (1/2) mile in length of the road -
way of any street shall be plowed up in advance of
pavement base, except where there are car tracks on
the street, in which case one side shall be held
intact until the construction of pavement base has
begun on the other side. On any street where the
improvement of the roadway is specified, the rough
grading in any block shall be completed and the surface
leveled up approximately to final subgrade or grade
oefore the construction of any cement work is begun
in such block. Excavated material, not required for
fills, shall oe removed from the street as soon as
excavated.
FILLING: The space over which fills are to
be made, shall first be cleared of all brush, timber
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trash, or debris. 911 filling shall be done with
good sound earth or gravel, and no oil cake or other
lumpy material, or material of a perishalle, spongy
or otherwise improper nature, shall be used in filling.
No Pills shall be widened by dumping loose material
over their slopes.
:Fills shall be made in layers not exceeding
one (1) foot in depth. Each layer, after being
leveled off, shall be thoroughly dampened, and while
still moist throughout, shall be rolled with a steam
or gasoline roller weighing not less than four hun-
dred (400) pounds per linear inch width of tire, until
hard and unyielding.
Any part of a fill which cannot be reached
with a steam or gasoline roller and rolled as here -
inbefore required, shall be placed in layers not
exceeding (4) inches in thickness, dampened and then
compacted with heavy iron tampers or with a hand
roller weighing not less than twenty -five (25) pounds
per linear inch width of tire; when the fill cannot
be reached by the roller, and when no concrete is
to be placed on the fill, the material may be brought
up in two (2) foot layers and each layer flooded with
six (6) inches depth of water. .dhen a fill is to
be widened, the new material shall be bonded to the old
by cutting steps into the existing slope and by bringing
up the layers as specified above*
tiVhen special flooding is required, the Con-
tractor shall perform the same in accordance with the
requirements as specified on the plans.
10D All!) 50rT EATERIAL: When mud, or other
soft or spongy material is encountered, it shall be
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removed and the space filled with gravel or
good earth, which shall be placed in layers and
rolled as hereinbefore set forth for fills, until
the surface ceases to move or creep under the
roller. The Contractor will not be required, in
such cases, to excavate mud or other soft or spongy
material to a depth greater than two (2) feet below
grade. 'Whenever any area is too wet to permit of
thorough rolling, the Contractor shall wait until
the material has dried sufficiently and then complete
the rolling.
SUBGRADE: After rough grading has been com-
pleted, the surface of the street shall be brought
to the required grade and cross section and the sub-
grade prepared as follows:
After a block or section has been graded to
approximate grade, the surface of the roadway shall
be trimmed, drenched with water and, while moist,
rolled with a steam or gasoline roller weighing not
less than four hundred (400) pounds per linear inch
width of tire, until the surface is unyielding.
Depressions made by rolling and ruts made by trucks
and wagons shall be leveled up with good earth and
rolled with a steam or gasoline roller weighing not
less than two hundred twenty -five (225) pounds per
linear inch width of tire. Portions of the road-
way which cannot be reached by rollers shall be
tamped solid.
Whenever a fill is made of sand of a quality
commonly known as "blow sand ", the sand shall be
confined lateraly, so that it cannot move out from
under the edges of the pavement.
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S.L41) CUSHIJid: When the concrete pavement is
to be laid upon adobe, or other swelling soils, a layer
of cushion sand _hall be placed upon the sub -grade
before the concrete is laid. This sand cushion shall
be of a thickness and in such location as shown upon
the plans.
SECTION 4. CONCRuTE: The materials for con-
crete shall be proportioned as follows: One (1) sack
of cement and two and one -half (2 -2-) cubic feet of sand
or stone screenings and three and one -half (3=2) cubic
feet of gravel or broken st.)ne and a maxirnum: of forty
two (42) ;allons of water.
L:EASURIiu x L AT.dHr1LS : For machine mixing, sand
or stone screenings and gravel or broken stone, shall be
measured in wheelbarrows which, when struck with a straight
edge resting upon tre sides shall have the capacity
necessary to accurately maint,An the above proportions.
For hand mixing, the sand or stone screenings and
gravel or broken stone shall be measured in boxes
haven; the following dimensions:
One (1) foot by three (3) feet by five (5) feet
for sand or stone screenings in all concrete and one(1)
foot by three (3) feet by seven (7) feet for gravel or
broken stone.
Every wheelbarrow load or box full of material
used must be struck with a straight edge as above specified.
Said material shall be measured loose, without shaking
or compacting.
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in
Cement sacks as above specified shall be dumped
directly into the mixer or upon the other material
previously measured upon a mixing platform.
The water necessary for every batch shall be
accurately measured with an apparatus which will
Positively prevent the use of more water than above
Specified. 110 mixer shall be used which is not pro-
vided with an accurate water measuring apparatus.
LIIXING CO.uCIC&TL: Machine mixing shall oe done with
batch mixers only. For Class B and for Class C concrete
the mixer shall be charged with one (1) sack of cement
and sufficient sand or stone screenings and gravel
or broken stone to conform with the proportions herein -
before stated. For Class A concrete, only, the mixer
may be charged with either one (1) or two (2) sacks of
cement and the specified amount of sand or stone screenings
and gravel or broken stone. Sufficient water, not in
excess of the quantity above specified, shall oe added to
produce a plastic or quaking concrete which can be handled
without causing a separation of the coarse aggregate
from the mortar. The mixer drum shall have a speed of
not less than thirteen (13) revolutions per minute and
every batch of concrete shall be mixed in the drum of
the mixer not less than sixty (60) secons before any
portion of the batch is discharged from the said drum.
At least seventy -five (75) seconds must elapse between the
placing of successive batches in the-mixer,
FLaIID III?CING: ilhere concrete is mixed by hand
one (1) box of gravel or broken stone shall be placed
on a tight platform, not less than ten (10) feet wide
and twelve (12) feet long. Upon the gravel or broken
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stone shall be placed one (1) box of sand or stone
screenings and upon this shall be placed the re-
quired number of sacks of cement. The inspector
shall be given the opportunity to check the number
of sacks of cement on each batch before the sacks
are opened.
The mass shall be turned with shovels (2)
tines dry and two (2) times wet, not including
shoveling into wheelbarrows. During every turning
the concrete shall be thoroughly and constantly
raked. The specified amount of water shall be
supplied in a spray during the wet turns.
REt.IXIEG CONCRETE: No concrete shall be used
which has partially set, and no concrete shall be
retempered or remixed.
SECTION 5. PLACING: The concrete shall be
spread upon a thoroughly dampened subgrade prepared
as above. The concrete shall be tamped and patted
until the surface is covered with mortar. Such
devices and methods shall then oe used as are necessary
to bring the surface of the concrete to true and even
grade and to the established cross section.
FINISHING: The surface shall then be finished
with a wooden float until smooth, uniform and dense.
EXPAITSION JOIJTS shall be constructed where
and as indicated on the plans.
The pavement shall be provided with transverse
expansion joints spaced not over twenty -five (25)
feet apart, and running at right angles with the
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center line of the road. The joint shall be formed
by embedding in the pavement at the time it is laid,
a "Carey" expansion joint or other expansion joint
equally satisfactory, one - quarter (1/4) inch in
thickness, to oe set in a vertical position. The
asphaltic felt shall extend the full width and depth
of the concrete pavement. The top of the asphaltic
felt shall be left flush with the surface of the con-
crete pavement.
SSCTIJ.I 6. CURIius: Durin.- the first
fourteen days (14) after placing, the concrete shall
be kept covered with wet earth by impoundin., water
within a series of earth dams and earth banks across
the pavement and along the sides of the pavement,
constructed at such locations and in such a manner
as the Street Superintendent itiay direct.
SEC'IHOJ 7. ClasUllT3 UP: jefore final
inspection the Contractor shall remove all earth
or debris from the pavement and from the street
and leave the street in a condition satisfactory
to the Street Superintendent.
The City Clerz shall certify to the passage
of this resol,tion and shall cause the same to us entered
in the nook of Resolutions in the City of z;1 L�egundo,
and shall maze a minute of the passa,;e thereof in
the record of the meetin, at which the same is p ssed.
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This resolution shall take effect 1ifl,ledlate-
• Passed and approved this day of
1920.
C-M" L E g
President of the 3oaij of Trustees
of the City of �`l Segundo, Calif.
Attest:
City Clerk.
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6T 2,1 0-' CdLI �'0 ti1Id )
COU.12Y JJ WC; call .'c.. -,�� s$•
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11' if uL a.u"a` u 2j)u )
I. Victor D. 1.cCarthy, City Clerk
of the City of El 6e;Tundo, California, do hereby
certify that the foregoin resolution, being
resolution iio. 27 was passed by the 3oard of
Trustees of the City of 111 6egundo, signed by
the .resident of said Doara, and attested by the
City Clerk, all at a re?ular n,eetin; of the said
Board 'held on the day of
1920, and that the same was passed oy the follocvin,;
vote:
6: 2-"'LT u JJ .Pi
1rUS2h La
City Clerk of the I of
�1 Segundo, Cal.
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