CC RESOLUTION 572RESOLUTION N0, 572.
A RESOLUTION OF THE CITY COUNCIL OF THE
CITY OF EL SEGUNDO, CALIFORNIA, ADOPTING
SPECIFICATIONS NUMBER F-1941 FOR GRADING
AND PAVEMENT IN SAID CITY.
The City Council of the City of E1 Segundo,
California, does resolve, declare and determine as follows:
SECTION 1. That the following specifications,
being and to be known as "Specifications of the City of
E1 Segundo, California Number E- 1941" ( "Specifications
for Grading and Pavement "), be, and the same are hereby
adopted:
"SPECIFICATIONS OF THE
CITY OF EL SEGUNDO, CALIFORNIA
NUMBER F-1941
0 SPECIFICATIONS FOR GRADING AND PAVEMENT')
-1.
MATERIALS
SOURCE OF SUPPLY AND QUALITY OF MATERIAL: At the option
of the Engineer, the source of supply of each of the
materials shall be approved by him before the delivery has
started. Only materials conforming to the requirements of
these specifications and approved by the Engineer shall be
used in the work. All materials proposed for use may be
inspected or tested at any time during their preparation
and use. After trial, if it is found that sources of supply
which have been approved do not furnish a uniform product,
or if the product from any source proves unacceptable at any
time, the Contractor shall furnish approved material from
other approved sources. No material which, after approval,
has in any way become unfit for use, shall be used in the work.
L
SAMPLES AND TESTS: The Contractor shall furnish such
samples of all materials as are requested by the Engineer
without charge. No material shall be used until it has
been approved by the Engineer.
All tests of materials furnished by the Contractor shall
be made by the Testing Laboratory designated by the City
Council, and all tests shall be in accordance with commonly
recognized standards of national organizations.
Wherever reference is made in these specifications to
standard tests or requirements of recognized national or-
ganizations, the reference shall be construed to mean the
standards that are in effect at the date of these specifica-
tions with subsequent amendments, changes or additions as
thereafter adopted and published by the organization re-
ferred to.
All materials not conforming to the requirements of these
specifications shall be considered as defective and all such
materials, whether in place or not, shall be rejected and
shall be removed immediately from the oite of the work,
unless otherwise permitted by the Engineer. Upon failure
on the part of the Contractor to comply forthwith with any
order of the Engineer made under this provision, the Engineer
shall have authority to remove and replace defective material
and to deduct the cost of removal and replacement from any
monies due or to become due the Contractor.
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jmilalO
DESCRIPTION: Earthwork shall consist of performing all
operations necessary to excavate earth or rook and to build
embankments in the street right -of -way.
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EMBANKMENTS: After the right -of -way is cleared, the total width
upon which the fill is to be made, if on comparatively level
ground, shall be plowed, scarified and finely broken up in
order to allow new filled material to bond with the old
earth. If broken material is dry or forms hard clods, it
shall be watered to soften the clods, after which the broken
material shall be rolled before placing embankment material.
Where embankments are to be made and compacted on original
hillside, and end dumping is permitted, the slopes of the
original ground shall be plowed or benched before filling
is commenced.
Large rocks or hard lumps, such as hardpan or cemented gravel,
which cannot be broken readily, shall be distributed through-
out the embankment and filled around with fine material so
as to produce a dense, compact material. No such rocks or
lumps over 4" in size shall be placed in the upper one foot
of the embankment.
All adobe or other high shrinkage materials placed in embank-
ments shall be deposited in the bottom of the fill and no such
material shall be placed in the embankment above a point two
feet below profile grade.
COMPACTING: Embankments shall be constructed in layers with
the center higher than the sides. The oross -fall of layers
shall not exceed one foot in twenty feet. Embankments built
of earthy materials shall be constructed in layers not exceed-
ing eight inches in thickness before compacting, and each
layer shall be rolled with tamping rollers until compacted.
Embankment material which does not contain sufficient moisture
to compact shall be sprinkled with water in accordance with
the directions of the Street Superintendent, either during
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excavation or when being placed in the embankment. Material
containing an excess of moisture shall be permitted to dry
to the proper consistency before being compacted.
Embankments built of sand shall be constructed in layers
approximately two feet thick and after being brought to
finished grade shall be diked and flooded with water until
full settlement has taken place. Where embankments are to
be constructed across low swampy ground which will not
support the weight of trucks or other hauling equipment, the
lower part of the fill may be constructed by dumping success-
ive truck loads In a uniformly distributed layer of a thick-
ness not greater than that necessary to support the trucks
while placing subsequent layers. The remainder of such fills
shall then be constructed in layers and compacted as above
specified. Tamping rollers shall consist of metal rollers,
drums, or shells surmounted by metal studs with tamping feet
projecting not less than seven inches from the surface of the
roller. Tamping feet shall be arranged in rows, the spaces
between rows and between feet within any one row being not
less than six inches nor more than twelve inches. The weight
of tamping rollers shall be such that the load on each tamper
foot shall not be less than fifty pounds per square inch of
cross - sectional area. The load per tamper foot will be de-
termined by dividing the total weight of the roller by the
maximum number of tamper feet in one row parallel to, or
approximately parallel to,the axis of the roller. At least
one eight -foot width of tamping roller shall be provided for
each one hundred fifty cubic yards, or fraction thereof, of
embankment material placed per hour. The quantity of material
Placed per hour shall be determined by averaging, the total
quantity of material placed within any one day.
C!
SHRINKAGE ALLOWANCE AND MAINTENANCE: Embankments shall be
maintained to the grade and cross - section shown upon the
plans until completion and acceptance by the Street Superin-
tendent.
III.
SUBGRADE
DESCRIPTION: The subgrade will be considered as that portion
of the roadway upon which surfacing or paving is to be placed.
Before the surfacing or paving is placed, a subgrade shall be
constructed conforming to the grades and cross- eections shown
on the plans and in accordance with these specifications.
The finished subgrade shall be true to cross - section, hard,
uniform, and smooth and shall support the wheels of heavily
loaded trucks without perceptible indentation, except where
the soil is too sandy.
In all cases the details of the operations of preparing
subgrade shall be under the direction of the Street Super-
intendent who shall have the authority at all times to stop
operations, if in his opinion these specifications are not
being complied with in a manner which will result in the
type of subgrade specified.
: That portion of the subgrade which is to re-
ceive the surfacing shall be plowed or scarified to a depth
of at least six inches below the final subgrade elevation
and by harrowing, dry rolling, and breaking clods, the earth
shall be brought to a finely divided condition, and shall
be uniform for the full width and depth of the subgrade. By
means of proper equipment, carefully handled, the earth shall
be removed to a uniform height above finished subgrade cross -
section, and surplus earth shall be removed. The height above
NM
subgrade cross - section shall be whatever may be found by
trial and experience to be proper to allow for final rolling
to subgrade elevation.
The loose earth shall then be thoroughly watered, in a
uniform manner and quantity, so that the penetration will be at
least four inches, and as uniform as possible. The earth
shall then be harrowed to mix the wet earth with the dry
earth beneath, until the whole mass of loose material is at
the proper state of moisture for rolling. The suhgrade shall
then be rolled thoroughly with a power roller of the approved
type weighing not less than ten tons and with a compression
on the rear wheels of not less than 325 pounds per lineal
inch of tire width until no more compression is possible,
as indicated by supporting the wheels of the roller without
Indentation. The loose earth as graded before watering
should be at such elevation that it will come down to grade
under the final rolling specified above. Traffic shall then
be kept from the subgrade until it has set hard. Where not
controlled by adjacent structures or features, the finished
subgrade may vary, but not to exceed one tenth foot above or
below the staked grade providing it is uniform and free from
sharp breaks. The cross- section shall be free from ridges
or valleys and shall be within five hundredths foot above
or below the theoretical section at any point on the cross -
section. Subgrade that does not conform to the above require-
ments shall be watered, recut, and thoroughly rolled.
If dry spots become apparent or if spongy or wavy spots
develop during rolling due to the use of too much water or
not enough harrowing, the condition shall be corrected before
proceeding further with the subgrade. Rolling shall continue
until no more compression is possible. When rolling is oom-
r-
pleted, the surface should be approximately one inch (1 ")above
finished subgrade elevation.
Immediately after rolling, the subgrade shall be out to true
grade and cross - section. The excess earth shall be removed
immediately after the cutting and on the final out the wheels
of the subgrader shall rest on the side forms at all points
as indicated when they are revolving. After the final cut,
the subgrade shall be checked by means of a scratch templet.
The nails in this templet shall not be more than three inches
(311) apart and shall project at least three - quarters of an
inch (3/411) from the wood in such a manner as to be on line
for the true depth and surface of the subgrade when the templet
is supported on each side by the side forms. When the sub-
grade is finished true to grade, it shall be watered and
allowed to bake.
Continued use of sections of prepared subgrade for hauling,
which will out or deform it from the true cross - section, will
not be permitted. The Contractor shall protect the prepared
subgrade from both his own and public traffic.
W here, in the opinion of the Street Superintendent, the
natural material of the subgrade is such that sufficient bear-
ing and compaction can not be obtained, local or imported
borrow shall be used in constructing the top layer of the
sub -base. The depth of the said top layer shall be determined
by the Street Superintendent in all cases. Local borrow shall
consist of material obtained by widening cuts or excavating
from sources within the right -of -way or immediately adjacent
thereto the source of which, however, shall be designated by
the Street Superintendent. Imported borrow shall consist of
material obtained from sources, the selection of which 1s op-
tional with the Contractor, provided the material is approved
by the Street Superintendent.
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IV.
PAVING - MACADAM
DESCRIPTION: Macadam paving shall consist of crushed rock,
screenings, and bituminous binder placed on the road..bed
in accordance with these specifications and in conformity
with the lines, grades, and dimensions shown on the plans.
MATERIALS: Crushed rock and screenings shall consist of
broken stone, crushed gravel, or both. Material shall be
sound rock of uniform quality and shall be clean and free
from dust, and shall be washed if necessary to insure per-
fectly clean aggregate.
ROCK FOR MACADAM PAVEMENT
Number of Rock To pass a ring of: Not to pass a ring of:
No.
1
3 -1/2"
diameter
1 -1/2"
diameter
No.
2
1-1/2"
diameter
3/4"
diameter
No.
3
3/4"
diameter
1/4"
diameter
No.
4
1/4"
diameter
0"
diameter
Note:
No.
12 rock shall
be No. 1 and
No. 2 rock as specified
above, combined in the ratio of four (4) parts of No. 1 to
one (1) part of No. 2.
BINDER: Bituminous binder shall be liquid asphalt or as-
phaltic emulsions whose classifications for convenient
reference will be designated by the initial letter of the
classification followed by a numeral to indicate the grade
within the classification conforming with the standards of
the American Association of State Highway Officials.
92
PLACING MATERIALS: Liquid asphalt, applied as prime coat
and bituminous binder shall be applied at temperatures
conforming to the range of temperatures specified by the
American Association of State Highway Officials.
Screenings shall be spread from trucks equipped to distri-
bute them in a thin sheet over a strip one -half (1/2) the
width of the surface to be treated. In spreading screen-
ings the truck shall be operated backward so that the fresh
oil shall be covered with screenings before the truck wheels
come upon it.
All rolling shall be done with power rollers having not
less than four (4) cylinders and weighing not less than
ten (10) tons with a compression on the rear wheels of at
least three hundred twenty -five (325) pounds per lineal
inch of tire width. All rolling shall commence at the outer
edges and continue toward the center. Under no circumstances
shall the center of the road be rolled first.
During the spreading of liquid asphalt or asphaltic emulsions,
the surface of all structures, guard rails and trees shall
be protected in a satisfactory manner to prevent being
spattered or marred.
CONSTRUCTION: Upon the sub -grade prepared as hereinbefore
specified, a layer of No. 12 rock shall be uniformly spread
and bladed with a road grader to such a depth that after
being thoroughly sprinkled with water and rolled, the sur-
face shall be one -half (1/2) inch below the finished grade.
All depressions that develop from rolling shall be filled
with rock as described above and rerolled. The sprinkling
and rolling shall be continued until the rock ceases to
sink under the roller, or creep in front of it.
FM
The surface must be uniformly smooth and conform to the
required oross - sections and grade. Then one or more
light applications of No. 4 rock shall be uniformly spread
over the surface and swept in with brooms in order to
fill all voids. The rock shall then be watered and rolled
and the application of No. 4 rock, watering, sweeping and
rolling continued until all the voids are filled and until
the rock layer is firmly looked and of such strength that
it will sustain and not show wheel marks from a motor
truck carrying a load and having a compression of not
less than 800 pounds per inch of tire width.
After stone has dried to a depth of one (1) inch, 5C-6
asphaltic oil shall be applied at the rate of five - eighths
(5/8) of a gallon per square yard of surface covered,
after which No. 3 rock shall be uniformly spread over
the oiled surface in a thin layer in sufficient quantities
to thoroughly bind the wearing surface and form a true
and even surface. The interstices shall be filled to
the surface.
Then a second application of asphaltic oil, Bitumuls HX,
shall be made at the rate of three - eighths (3/8) gallon
per square yard of surface covered. A light coating of
No. 4 rook shall then be spread over the surface to absorb
all surplus oil and produce a uniform surface with no oil
exposed and no patches of excess screenings. The pavement
shall then be watered and thoroughly rolled until it be-
comes hard and smooth, true to grade and oross - section
and free from all hollows or irregularities.
The pavement when ready for acceptance shall be thoroughly
compacted, and the surface of the pavement shall present
a uniform bituminized appearance.
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V.
PAVING - PLANT MIX
: Plant -mixed paving shall be composed of
mineral aggregate and liquid asphalt, mixed at a central
mixing plant, and placed on the road bed in accordance
with these specifications and in conformity with the lines,
grades and dimensions shown on the plans, and the typical
cross - section.
A prime coat of liquid asphalt or asphaltic paint binder,
if designated on the plans, shall be applied to the base
before placing the surface mixture.
MATERIALS: Liquid asphalt to be mixed with the mineral
aggregate at the central mixing plant shall be of the grade
designated on the plans and shall conform to the standards
of the American Association of State Highway Officials.
Liquid asphalt for use as a prime coat, where required,
shall be grade SC-2.
Asphaltic paint binder, if specified for prime coat, shall
be emulsion (LX Bitumuls).
Mineral aggregate shall consist of any one or a mixture of
the following materials:
(1) Broken stone or crushed gravel,
(2) Natural material having essentially the same qualities of
of angularity as broken stone and meeting the requirements
for stability when combined within the limits for grading,
(3) Natural rough surface gravel meeting the requirements for
stability when combined within the limits for grading.
The material shall be tough, durable, and sound, and shall
be free from adobe vegetable matter, and other deleterious
substances.
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The mineral aggregate shall be of such size that the per-
centage composition by weight, as determined by laboratory
sieves, will conform to one of the following gradings. Un-
less otherwise specified in the special provisions, the
mineral aggregate shall conform to the grading specified
for three - fourths (3/4) inch maximum aggregate.
Sieve Sizes Percentage Passing Sieves
3/4" Max. 1/2" Max. 3/8" Max. No. 4 Max.
1" . . . . . .
100
-
-
3/4" . . . . . .
95 -100
100
-
1/2" . . .
-
95 -100
100
3/8" . . .
65- 85
75- 95
95-100
No. 4 . .
50- 65
55- 73
65-
85
No. 16 . . . . .
30- 43
30- 45
38-
52
No. 50 . . . . .
16- 25
18- 27
20-
30
No.200
3- 8
4- 9
5-
12
100
90 -100
46- 67
22- 33
6- 14
PLACING: Plant -mixed paving material shall be spread by means
affording a uniform deposition of material upon the road bed.
Material shall not be dumped in piles upon the subgrade. After
spreading, the material shall be bladed with a power grader,
removing all but the lower one (1) inch of surfacing after
spreading. As a result of the above grading operations, longi-
tudinal windrows of approximately equal size shall be deposited
along the sides of the road bed, care being exercised in plac-
ing the material in the windrows so that it does not become
mixed with earth or shoulder material.
The area between the windrows shall then be thoroughly rolled,
after which the material in the windrows shall be spread even-
ly over the entire width by blading to the center and then
packing toward the edges leaving not more than one and one -half
(1 -1/2) inches of surfacing upon the previously consolidated
layer. Each layer shall be compacted thoroughly by rolling
immediately upon completion and spreading operations. The
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above described spreading operations shall be repeated
until all the loose material has been laid and consolidated.
No layer of surfacing shall be spread more than one day in
advance of the succeeding layer.
Depositing and spreading shall begin at the point or points
farthest from the central mixing plant and shall progress
continuously toward the plant, unless otherwise ordered by
the Street Superintendent.
Segregation of coarse or fine particles shall be avoided and
the surfacing as spread shall be free from lumps or pockets
of coarse or fine material. Segregated materials or lumps
shall be re -mixed by harrowing and blading.
Rolling shall commence at the outside edges and progress
toward the center of the road bed. Under no circumstances
shall the center of the road be rolled first. On completion
of blading operations, all loose stones shall be swept to
the outside of the surfaced areas and incorporated with the
shoulder material or picked up and disposed of.
Blading equipment shall consist of pneumatic -tired power
graders having a ten (10) foot blade and a wheel base not
less than fifteen (15) feet long. The power graders shall
be free from appreciable lost motion in the blade control
and shall have rigid frames.
Power rollers shall have not less than four (4) cylinders and
shall be of the tandem type, weighing not less than eight (8)
tons.
Over areas where the material can not be placed and properly
compacted by means of power equipment, the material shall be
spread, raked and compacted by other approved methods.
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In lieu of the foregoing placement operations, material may
be laid with a paving machine after which it shall be rolled
as hereinabove specified.
SECTION 2. That the City Clerk shall certify to
the passage and adoption of this resolution; shall enter
the same in the book of resolutions of said City, and shall
make a minute of the passage and adoption thereof in the
records of the proceedings of the City Council of said City
in the minutes of the meeting at which the same was passed
and adopted.
Passed, approved and adopted this 23rd day of
July, A. D., 1941.
Mayor of the -City of El Segundo,
California.
AT
#
,L'
Ci�� Clerk
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES ) SS.
CITY OF EL SEGUNDO )
I, Victor D. McCarthy, City Clerk of the City of
E1 Segundo, California, do hereby certify that the whole
number of members of the City Council of the said City is five;
that the foregoing resolution, being Resolution No. 572, was
passed and adopted by the said City Council, approved and
signed by the Mayor of said City and attested by the City
Clerk of said City, all at a regular meeting of the said
Council held on the 23rd day of July, A. D., 1941, and that
the same was passed and adopted by the following vote, to -wit:
AYES: Councilmen Gerow, Hesser, Love and Mayor Binder;
NOES: Councilmen None;
ABSENT: Councilman Selby.
6- 'City Clerk bf the City of
E1 Segundo, California.
( SEAL)
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