(a) Variations. Should the owner elect any other type of base or wearing surface than that set forth herein, or elect to change any other specification contained herein, the owner shall submit to the Engineer a complete detailed specification, prepared by a registered engineer, covering the desired changes. Any such change shall only be used after it has been approved in writing by the Engineer and by resolution of Council. The owner shall deposit with the Clerk a certified check in the amount determined by Council as sufficient to pay all charges by the Engineer for inspection and approval of plans and of construction.
(b) Drainage. The owner shall, before beginning construction work, furnish definite plans and profiles satisfactory to Council and the Engineer showing the definite location of work to be done, a lay-out of the street drainage system and materials to be used and profiles showing gradients of street drainage ditches and structures, together with limits of areas draining into such ditches and structures. All plans, specifications, profiles, determinations of drainage sizes, etc. must be prepared by a registered engineer evidenced by affixing of his official seal thereto.
(Ord. 538-55. Passed 4-4-55.)
(Ord. 538-55. Passed 4-4-55.)
(c) Drainage Structures. The owner shall construct, at intervals of not more than 350 feet apart, on the high side of street intersections and at low spots, drainage structures as shown on a typical cross-section or an equal approved by Council. Should the topography of surrounding territory preclude removal of storm water at locations specified above, the owner's plan shall show a storm sewer system which shall be satisfactory to the City and the Engineer. On any ditches having gradients of over two percent, the owner shall provide suitable means, satisfactory to the City and the Engineer, to prevent erosion in such ditches. Ditches shall be allowed only as swales for the collection of rear yard run-off.
(Ord. 11-64. Passed 4-21-64.)
(d) Grading. The owner shall grade the street to the width shown on the cross-section including slopes and subgrade for pavement. All old pavement, shale, rock, slag, cinders, concrete or asphalt driveways included with the limits of construction, trees, stumps, sod, loam, old culvert walls, sluices or any other objectionable materials encountered during the progress of work shall be removed from the roadway area, including returns, to the full depth of subgrade. Grading shall include formation of all slopes, embankments and filling as herein specified and as shown on such cross-section.
(1) Waste. If the amount excavated is in excess of the amount required in embankments and for authorized filling on adjacent lands, the excess material shall be disposed of by the owner in other places, outside the limits of the work, having first obtained permission from the recipient for such disposal.
(2) Rolling. All earth filling and embankments in the road bed shall be thoroughly consolidated by rolling in layers not exceeding one foot in depth. Both filling and embankments and the subgrade shall be compacted with an approved roller weighing not less than ten tons, except upon the subgrade, where, in the opinion of the Engineer, such a roller can not be satisfactorily operated, in which case a lighter roller, meeting the approval of the Engineer, may be used, and tamping in such a manner and to such extent that additional rolling and tamping do not add to the density of the subgrade. The roller shall be so operated as to roll the entire roadway, returns and intersections at least three times and additional operations where ordered.
(3) Subgrade. If any spongy, vegetable or any other objectionable matter is found in the road bed below the subgrade, such material shall be removed and the space filled with stone fragments, slag, sand or gravel and shall be carefully rammed or rolled in order to make such filling compact, solid and true to the surface of the subgrade.
(4) Template. The subgrade shall be brought to the required crown by use of suitable tools and checked with the template furnished by the owner. The template used in checking the cross-section of the subgrade shall conform to the specified cross-section of the roadway, shall be of a design and construction satisfactory to the Engineer and must be operated by guides to insure uniformity of elevations. The area in intersections shall be graded by staking into sections not more than ten feet square and conforming the subgrade to such governing points.
(Ord. 538-55. Passed 4-4-55.)
(5) Completion and approval of subgrade. Upon completion and approval of the forming of the subgrade, a four-inch I-22 granular sub-base shall be placed in conformance with Ohio State Highway Material and Specifications requirements.
(Ord. 11-64. Passed 4-21-64.)
(Ord. 11-64. Passed 4-21-64.)
(e) Reinforced Concrete Pavement. Upon the prepared subgrade, as herein specified, there shall be laid a reinforced concrete pavement, true to line, grade and camber shown on the cross-section, and the thickness shown on the plans or proposal.
(1) Cement. The cement used in concrete shall be of approved brand and shall meet the requirements of the Tentative Specifications for Air-Entraining Portland Cement for Concrete Pavements of the American Society for Testing Materials, Designation C 175 (Type 1A). The tensile strength requirements shall govern. When the cement is delivered in packages, the name and brand of the manufacturer of the cement and the type shall be plainly marked thereon. A sack of cement shall contain ninety-four pounds and a barrel of cement shall consist of 376 pounds net.
(2) Sand. The sand used for concrete shall be natural sand composed of clean, hard, durable, uncoated particles of stone, well graded from coarse to fine, free from lumps of clay and all organic matter. It shall show not over four percent loss on decantation by weight. It shall be uniformly graded from that which will pass a No. 4 sieve to that which will not pass a No. 100 sieve and at least one-third of the material shall be retained upon a No. 30 sieve.
(3) Coarse aggregate. The coarse aggregate shall consist of crushed limestone or air-cooled blast furnace slag having clean, hard, strong, durable and uncoated particles. It shall be free from an injurious amount of soft, friable, thin, elongated or laminated particles or pieces, alkali, organic or other deleterious matter. The maximum percentages of such deleterious substances shall not exceed one percent which can be removed by decantation nor more than five percent, in total, of coal, clay lumps, soft fragments, alkali, friable or laminated pieces.
A. Physical properties. The percentage of wear shall not be over six percent for limestone or fifteen percent for slag; modified abrasion loss shall not be over twenty-four percent for both limestone and slag.
B. Soundness. When tested in accordance with the Tentative Method of Test for Soundness of Aggregates by Use of Sodium Sulfate, American Society for Testing Materials Designation C88, the weighted average loss in five cycles shall not exceed twelve percent for both limestone and slag.
C. Coarse aggregate shall be mechanically crushed and screened into No. 3 and No. 4 sizes, Ohio State Highway Specifications, and combined by weighing each size into the batch separately with size No. 4 having a ratio of from thirty-five percent to fifty percent of the total. The weight of slag per cubic foot, in compacted aggregate, shall not be less than sixty-five pounds.
(4) Mix. Concrete shall consist of a mixture of Air-Entraining Portland Cement, coarse aggregate, sand and water, proportioned in accordance with the requirements of this specification. Cement shall be measured by weight and shall be weighed on a balance or scale separate from those used to weigh the other ingredients. Aggregates shall be measured by weight. Batch weights shall be based on surface dried materials and shall be corrected to take into account the weight of surface water contained in the aggregates. Water shall be measured by volume or weight. Total or maximum water shall be considered as that including added water and absorbed (surface) water in aggregates.
Concrete shall be Class "D", Ohio State Highway Specifications, and shall be proportioned as follows:
Minimum cement, bags per one cubic yard of concrete | 6-1/2 |
Maximum water, gallons per bag of cement | 5-1/2 |
Minimum compressive strength, pound per square inch at twenty-eight day | 3,500 |
Proportion by volume, cement to total aggregate | 1 to 5-1/4 |
The weights in pounds of dry aggregates per sack (ninety-four pounds) of Air-Entraining Portland Cement shall be as follows:
Fine Aggregate (lbs.) | Coarse Aggregate (lbs.) | Total (lbs.) | |
Limestone | 180 | 300 | 480 |
Slag | 195 | 245 | 440 |
The weights used in this table of aggregates are based on specific gravities of 2.65 for sand and limestone and of 2.30 for slag.
The slump range in inches, shall be not less than two inches nor more than three inches when finished by ordinary methods and shall be not less than one inch nor more than one and one-half inches when finished by use of a vibrating machine. Slump shall be determined in accordance with the Standard Method of Slump Test for Consistency in Portland Cement Concrete, American Society for Testing Materials Designation C 143.
(5) Concrete test specimens. Two test cylinders, six inches in diameter and twelve inches high shall be made from each 2000 square yards of pavement or fraction thereof, placed each day from concrete which is being incorporated in the work, if so ordered by the Engineer. These cylinders shall be made and tested by a reputable laboratory selected by the Engineer, shall be made in accordance with the Standard Method of Making and Storing Compressing Test Specimens of Concrete in the Field, A.S.T.M. Designation C 31, and then tested in accordance with the Standard Method of Test for Compressive Strength of Molded Concrete Cylinders, A.S.T.M. Designation C 39. The minimum compressive strength of concrete at twenty-eight days shall be 3, 500 pounds per square inch. The owner shall pay all costs for such tests.
(6) Type of concrete. Only ready-mixed concrete will be used and allowed in the concrete pavement. In this operation the cement, sand and limestone or slag shall be loaded and mixed with water added. All concrete shall be thoroughly mixed in a batch-type mixer of approved type for at least one and one-half minutes. Only enough water shall be used to secure hydration and the batch shall be of uniform and workable consistency and in no case shall the slump be less than two inches nor more than three inches except when vibrating machines are used, in which case the slump shall be not less than one inch nor more than one and one-half inches. The concrete mixture shall be transported to the site of work in portable-type mixers mounted on motor trucks. The mixing device shall be operated so as to revolve at the rate of from twelve to twenty-four revolutions per minute. There shall be no segregation of the mixed concrete when it is delivered on the site of work. Concrete shall be mixed not to exceed one hour before placing, unless otherwise permitted by the Engineer. If ordered by the Engineer, the owner must provide planking over which the concrete mixer trucks can back over the prepared subgrade. Any rutting of the subgrade must be repaired by reshaping the surface, filling any depressions with fine granulated slag or slag screenings and then thoroughly rolling to firm compaction.
(7) Work in freezing weather. Unless otherwise specified, concrete when deposited shall have a temperature of not less than fifty degrees Fahrenheit, nor more than 115 degrees Fahrenheit. In freezing weather, suitable means shall be provided for maintaining the concrete at a temperature of forty-five degrees Fahrenheit for a period of not less than seven days. Construction must stop if the temperature falls to thirty-six degrees Fahrenheit. No frozen materials shall be used in the concrete nor shall concrete be laid on frozen ground. Any concrete which may be damaged by frost action shall replaced by the owner at his own expense.
(8) Forms. The owner must use steel forms of an approved section for both straight and radial work, if concrete integral curb is used or if the owner elects to install sandstone curb after the concrete pavement is constructed. The steel forms must be clean and coated with a suitable oil before the placing of concrete. The forms must be securely braced and held to the exact line and grade of street and when tested with a ten-foot straight-edge shall show no variance of more than one-eighth of an inch from true plane. The forms must be supported on thoroughly compacted material for their entire length. The space to be filled with concrete must be free from all rubbish or debris at the time the concrete is placed. The forms shall not be removed until twenty-four hours after the concrete pavement has been placed.
(9) Checking subgrade. The owner shall furnish and use a subgrade template, as described in subsection (d)(4) herein, upon the road bed immediately ahead of the concrete work. Any corrections in the surface of the subgrade must be made with hand tools and the filling of depressions must be made with concrete, crushed stone or slag. Earth or other soft material shall not be used in rectifying subgrade depressions after rolling has been completed. This checking of subgrade shall be a part of the owner's obligation and must at all times be kept at least twenty feet ahead of the concrete being laid.
(10) Spraying. During dry weather the subgrade shall be kept moist by spraying, but on clay soil such operations must be done during the noon period or after the day's work, in order to allow excess water to be absorbed. Whenever spraying is specified it contemplates the use of a device that will throw finely divided jets of water over relatively large areas. The flooding of materials of surfaces by solid streams of water will not be allowed.
(11) Placing. Upon the prepared subgrade, and only when the subgrade is moist, the mixed concrete shall be deposited rapidly to the required depth and for the entire width of the pavement sections in successive batches and in a continuous operation. The use of intermediate forms or bulkheads between joints will not be permitted except as shown on the plans or otherwise specified.
While being deposited the concrete shall be vigorously manipulated with spades or other suitable tools to prevent the formation of voids or honeycombed sections. Special attention shall be given to the compacting of the concrete against forms, curbs, street castings and joints.
In the event of an interruption in the delivery of concrete or any mechanical difficulties which result in stopping concrete operations for more than thirty minutes, a transverse construction joint shall be formed as specified. Any concrete which has been delivered in quantities in excess of that needed to form this intermediate transverse joint shall not be used.
Before any reinforcing fabric is placed, the concrete shall be struck off so that its surface will conform to a surface parallel with and two inches below the finished surface of the pavement. On this surface the welded wire fabric reinforcement shall be placed and so securely held that it shall remain to a uniform depth of two inches below the finished surface during the placing of the subsequent concrete. Immediately after the placing of the welded wire fabric reinforcement, the top two inches of concrete shall be placed. In no event shall more than forty-five minutes elapse between the placing of the concrete below the reinforcement and that above the reinforcement. Sufficient concrete shall be used so that after being thoroughly consolidated by tamping, ramming, machine or hand finishing, as specified in subsections (e)(12) and (e)(15) herein, the concrete shall have a depth of at least the thickness shown on the plans or proposal.
(12) Machine finishing. Unless otherwise specified or permitted, and immediately after the concrete is placed, the surface of the concrete shall be brought to the proper grade and crown and thoroughly compacted by a mechanical, self propelled finishing machine of the type approved by the Engineer and meeting the requirements of Section CE-9 of the Construction and Material Specifications of the Ohio Department of Highways, a copy of which is on file in the office of the Engineer.
The finishing machine shall be operated over each section of the pavement two or more times and at such intervals as are required to produce the specified results. During the operation of striking off the concrete surface, a uniform ridge of concrete approximately three inches in depth shall be maintained ahead of the strike-off for its entire width. The finishing machine shall not be operated beyond the point where the three-inch depth of the surplus concrete can be maintained except where necessary in making joints.
After the first operation of the finishing machine, additional concrete shall be added as required, porous spots shall be redressed, and the surface restruck by the finishing machine. Porous spots shall not be eliminated by tamping or grouting.
The elevation and arrangement of the strike-off and spreads shall be such that a finished pavement having the specified crown and thickness will be secured.
The concrete adjacent to transverse joints shall be thoroughly compacted by means of an approved internal vibrator. The vibrators used for this purpose shall be of the pneumatic, gas-driven or electric type and shall be operated at a frequency of not less than 3200 pulsations per minute. At the time the concrete is placed and spread, it shall be thoroughly spaded and vibrated at the forms, curbs, bulkheads, center joints and elsewhere unless otherwise specified or permitted.
The surface of the concrete shall be tested before the final belting, using an approved standard straight-edge, ten feet in length, and a template cut to the proper section. Irregularities exceeding one-fourth of an inch shall be corrected before the initial set has developed in the concrete.
After the compacting of the concrete and when the surface has been brought to the proper grade, cross-section and smoothness, it shall be finished by the use of a canvas or rubber belt, or a thin wooden board not less than eight inches in width and approximately one foot shorter than the width of the pavement slab. The finishing belt may be either hand or mechanically operated. The finishing belt or board shall be worked with a crosswise and longitudinal motion until all surface irregularities are eliminated and all surplus water removed. Care shall be observed in the use of the finishing belt or board not to permit the edges to dig into the surface of the concrete or to work the crown out of the pavement. The finished surface of the concrete shall not vary more than one-fourth of an inch from the specified contour. In rainy weather the concrete shall be protected as soon as it is finished with canvas supported above the surface of the pavement. As soon as the concrete has hardened sufficiently, the edges of the longitudinal, construction and expansion joints shall be carefully finished with an edging tool having a radius of one-fourth of an inch except as otherwise directed.
(13) Broom finish. After the edging of the joints has been completed and before the concrete has had its initial set, the surface of the pavement shall be given a broom finish. The broom shall be of an approved type, not less than eighteen inches in width, of fiber or flat wire, and not more than five inches in length. The strokes shall be from center to edge of slab, one stroke per width of broom, with adjacent strokes slightly overlapped. The broom shall be operated so as not to tear the concrete and as to produce regular corrugation not over one-eighth of an inch in depth. The surface of the concrete, after completion of the brooming, shall be uniform in appearance and shall be to the specified grade, elevation and contour. It shall be free from surplus water, rough or porous spots, irregularities or depressions and any objectionable features resulting from the operation of the broom.
(14) Surface gauge. The top surface of concrete pavement must conform with a template having the camber shown on the cross-section plan for improvement. The template must be set with reference to forms or curbs and be supported upon them while in use. The setting of subgrade and surface templates must be checked by staking gutters, the center of the pavement and intermediate points every two feet for concrete depth, using the curb or form for grade and placing stakes to indicate the full thickness of concrete. The finished surface of the concrete pavement shall not vary more than one-fourth of an inch from the specified contour nor more than one-fourth of an inch when tested with a ten-foot straight-edge laid parallel to the center line of pavement. Irregularities exceeding one-fourth of an inch shall be immediately corrected. All depressions or projections discovered shall be corrected before the initial set has developed in the concrete.
(15) Hand finishing. When specifically permitted by the Engineer, the concrete pavement may be finished and brought to the proper crown and grade by the use of a strike-board or template. Immediately after the concrete is placed, it shall be thoroughly consolidated by ramming, using iron-faced tampers of approximately thirty-six square inches in surface area and weighing not less than forty pounds. The concrete shall then be finished and thoroughly compacted by tamping with a heavy steel-shod wooden template and the entire surface shall be worked over until a uniform consolidation is obtained. After the compacting of the concrete has been completed, the striking template shall be operated forward with a combined longitudinal and transverse motion, without raising either end off the side forms, producing an even surface true to line and grade. The surface shall then be finished as specified above under subsection (e)(13) herein.
(16) Curing. Within one hour after the concrete has been tamped and gauged for the cross-section and longitudinally, the owner shall cover the surface with heavy burlap or canvas and keep such protective covering in place and well moistened for at least twenty-four hours. The concrete surface shall be kept damp by spraying with water after 4:00 p.m. each day for one week after the concrete has been laid. Forenoon spraying will be ordered for the first three days if it is hot and dry. No traffic shall be permitted upon the surface of the concrete pavement for seven days after the base has been laid. The owner must maintain suitable and adequate barricades and red lights at night during this period.
When the average temperature is below fifty degrees Fahrenheit, sprinkling may be discontinued except when the surface shows signs of drying too rapidly. If at any time the temperature is apt to drop below thirty-six degrees Fahrenheit, any completed pavement, laid less than ten hours, shall be protected by placing a covering of canvas, straw or other suitable material over the newly laid concrete in such a manner as to leave an air space between the surface or concrete and protective cover. Disturbance of the enclosed air shall be prevented as much as possible by weighing the canvas or other covering with timbers, sand or earth.
(Ord. 538-55. Passed 4-4-55.)
(17) Transparent film method of curing. After the concrete has been properly placed and finished as specified, and when so permitted by the Engineer or specified, concrete pavements shall be cured by the use of an epoxy clorinated rubber curing compound meeting the requirements of Tri-Kote Concrete Treatment (TK-18) or equal and shall contain a fugitive die. This material shall also meet both Type 1 and Type 2 of New Interim Federal Specifications, (TT-C-00800) (GSA-FSS). The preliminary curing by the use of wet burlap or canvas may be omitted when this type of curing is followed.
The curing material shall be supplied uniformly by means of an approved pressure spray distributor at the rate of one gallon to each 300 square feet of surface, and it shall be so applied that the concrete surface is completely coated and sealed at one application and is not marred. The curing material shall be applied immediately after the concrete surface to be cured has been finished and before any marked hydration has occurred. After the surface has been coated, it shall be protected from all traffic or abrasive action from any source.
Complete duplicate spraying outfits shall be on the site of the work where this method of curing is adopted before concreting is started. Before the curing compound is sprayed upon the pavement, the owner must cover all joints with a strip of burlap not less than twelve inches wide and shall then cure the concrete in and adjacent to the joint by the method of water curing as specified in subsection (e)(16) herein. The rest of the pavement may then be cured by the transparent film method. The owner shall erect suitable barricades and take adequate precautions to keep all traffic or paving operations off the concrete until the expiration of seven days from the time of application of the curing compound.
(Ord. 66-66. Passed 7-11-66.)
(Ord. 66-66. Passed 7-11-66.)
(18) Depth. The concrete pavement shall have a thickness or depth of at least the thickness shown on the plans or proposal, with its top surface, as specified, to finished grade, but in no case less than seven inches, except industrial roads which shall in no case be less than nine inches.
(19) Width. The minimum pavement widths for the finished grade of road from curb line to curb line shall be as follows:
Feet | |
Residential road | 26 |
Arterial residential road | 28 |
Industrial road | 28 |
Apartment road | 26 |
Arterial apartment road | 2 roads 18-feet wide and separated by a 10-foot wide median. |
(Ord. 11-64. Passed 4-21-64.)
(f) Steel Reinforcement. The steel reinforcement shall be of the open mesh type welded wire fabric manufactured for concrete reinforcement, with the cross ties firmly welded to the longitudinal wires, and meeting the requirements of the Standard Specifications for Welded Steel Wire Fabric for Concrete Reinforcement, A.S.T.M. Designation A 185. This mesh must weigh at least fifty-eight pounds per hundred square feet. It shall be thoroughly cleaned of mill rust and scale and of coatings that will destroy or reduce the bond. It shall be cut into sections, flattened and have all bends and buckles smoothed out before placing it in the concrete base. Successive sheets of mesh must be overlapped at least one-half the distance between wires. The width and length of reinforcement shall clear the edge of the concrete slab and all contraction and expansion joints by three inches. The contract price per measured square yard for reinforced concrete pavement of the specified thickness shall cover all cost of material and the placing of same in the concrete pavement.
(g) Joints. Expansion, contraction, longitudinal key and construction joints shall be made in accordance with the standard and detail plans and as herein specified. The plane of all joints shall be at right angles to the surface of the pavement.
(1) Longitudinal key joints. These specifications contemplate the construction of the concrete base in two halves by separate concreting operations, and longitudinal joints of the key type shall be installed along the center line of the pavement. This type of joint shall be constructed by the use of a form either of metal or other suitable material to the dimensions shown on plan. Maximum error in alignment is one-half of an inch in fifty feet.
Tie bars of five-eighths of an inch round, deformed bars, of billet steel shall be installed at intervals of five feet along such center line of pavement, except where such location coincides with transverse joints. They shall be held firmly in place by means of a device satisfactory to the Engineer. They shall be four feet along extending two feet on each side of the center line pavement and shall be placed in the center of the concrete slab and at right angles to the center line of the pavement. The tie bars must be straight when placed. Prior to placing concrete for the adjacent half of the pavement, any bent bars shall be straightened by means of a pipe slipped over the free end of the bar. Key joints shall be painted with two coats of bituminous material as per the requirements of the State Highway Specifications, Section M-5.6 F-2 before the second half of the pavement is poured.
(2) Construction joints. At the end of each day's concreting operations or at any time when the placing of the concrete is suspended for forty-five minutes or more, transverse construction joints shall be constructed. These joints shall be formed by means of a well-braced bulkhead, conforming to the camber of the cross-section, constructed so as to permit dowel bars to extend through the joint. The dowel bars shall be three-fourths of an inch round, straight, smooth bars free from buring and flattening at the ends, with one half coated with suitable bituminous material or with an oil such as 600 W. No dowel socket or expansion cap will be required when used in such construction joints. No construction joint shall be placed closer than seven and one-half feet to a parallel joint. The dowels shall be fifteen inches long, extending seven and one-half inches on each side of the joint, and shall be held by proper supports so as to be in the center of the concrete slab and perpendicular to the joint. They shall be spaced fifteen inches on centers with end spaces not less than three inches nor more than ten and one-half inches.
(3) Transverse contraction joints. Impressed contraction joints shall be constructed at forty-foot intervals from the expansion joints with not less than seven nor more than fifteen joints constructed between expansion joints. No such contraction joint shall be placed closer than seven and one- half feet to a construction joint. In such cases the construction joint shall take the place of the contraction joint.
The contraction joint shall be of the impressed type made by forming in the surface of the slab a slot one-fourth of an inch wide at the bottom and three- eighths of an inch wide at the top. The slot shall be two and three-fourths inches in depth. The impressing device shall be removed as soon as the concrete has set sufficiently to preclude the possibility of injury to the concrete.
The groove formed by the impressing device shall be kept free from dirt or foreign matter until the filler is placed as hereinafter directed. Dowel bars shall be used and installed as specified in subsection (g)(2) herein.
(4) Transverse expansion joints. Transverse expansion joints shall be placed at intervals of from 280 feet to 600 feet in length. Dowel bars, as specified in subsection (g)(2) herein, shall be used, but for the expansion joint shall be equipped with a neat fitting metal cap at one end.
The joint shall be constructed of a premolded bituminous material meeting with the requirements of the State Highway Specifications Section M-10.01, having a width of three-fourths of an inch, and shall be constructed in such a manner that the finished joints will be perpendicular to the center line of the street and to the surface of the pavement. The premolded material shall be installed before the concrete is placed and shall be held rigidly in position by any means acceptable to the Engineer that will conform to these requirements. Extreme care shall be observed in placing concrete on both sides of all joint material, and any device used in maintaining such material in position shall be carefully withdrawn before the concrete has attained a hardened condition. Load transfer devices shall be placed as shown on the detailed plans. Unless otherwise specified, plain dowel bars filled with caps shall be placed on fifteen-inch centers and shall be firmly held in alignment by suitable chairs or other acceptable supporting devices.
(5) Sealing joints. All joints shall be sealed with bituminous filler meeting the requirements of the State Highway Specifications Section M-5.6 F-1. Immediately before pouring the bituminous seal material, an application of kerosene shall be made to the area of the concrete that will be in contact with the seal material. The application of kerosene shall be by pressure spray, brush or swab.
(h) Integral Concrete Curb. Integral concrete curbs shall be constructed in accordance with the Standard Specifications for Concrete Curb but modified to meet the dimensions as shown on detail plans.
When the integral curbs are constructed, all transverse joints shall be spaced the same as and shall be continuous with the joints in the pavement. Integral curb shall be dropped four inches at all driveway openings.
Concrete for integral curb shall be placed when the concrete in the pavement is still plastic and the concrete curb and the concrete pavement shall be firmly bonded together. In cases where it is not practicable, on account of the presence of finishing equipment to place integral curb while the pavement concrete is still plastic, bond may be secured by means of steel dowels placed vertically at one-foot centers and in a line at the center of the proposed integral curb. These dowels shall be five-eighths of an inch round, deformed bars of billet steel and shall extend to within one and one-half inches of the subgrade and four inches above the pavement surface when placed.
As soon as the concrete has set sufficiently to avoid being displaced, but before it has become hardened, the concrete surface shall be removed for a depth of one inch below the pavement surface and for a width of the proposed curb plus the width of the fill between the curb surface and the pavement surface.
Immediately before placing the concrete for the curb, the surface upon which the curb is to be placed shall be carefully treated with a one part Portland Cement to two parts sand mortar carefully worked into the surface by brushing.
(i) Curb Drains. After the pavement has been constructed, drains shall be constructed in a trench excavated along the outer edge of pavement to the depth shown on plans or otherwise ordered.
The drain shall be four-inch vitrified sewer pipe, hub and spigot pattern, conforming to all the requirements of the "Specification for Standard Strength Clay Pipe" A.S.T.M. Designation C 13 and shall be laid to a true line and grade. The soil at the bottom of trench shall be shaped to give full support to the lower quarter of the pipe. Care shall be observed to excavate bell holes and in all cases "first class bedding" will be required.
Joints in bell and spigot drain pipe shall be wrapped with a strip of coarse burlap eight inches wide and long enough to encircle the pipe and leave a lap of eight inches, which lap must come on top of the pipe.
After laying the pipe and properly protecting the joints, as above specified, the trench shall be filled with No. 46 broken stone or slag to within four inches of the surface of the ground. This filling must be carefully and thoroughly tamped as placed, special care being taken to work the filling around the pipe.
All drains shall be connected with catchbasins by means of a four-inch vitrified sewer pipe curve and a four-inch vitrified sewer pipe.
(j) Resetting Street Castings. Street castings, such as manhole and catchbasin rings and covers, valve box tops, etc., which are found not to conform with the finished grade of pavement shall, when so ordered by Engineer, be reset to such grade. This work shall include removing the casting, trowelling sufficient mortar, composed of one part Portland Cement and three parts sand, to bring the casting, when reset to proper line and grade, or to remove the present mortar or top course of brick and then bring the casting to proper line and grade with sufficient mortar as above specified, or to add additional course or courses of brick and then bring the casting to a proper line and grade as aforesaid.
(k) Special Requirements.
(1) Patents. All compensation for any patented invention, article or arrangement that is used upon, or in anyway connected with the construction, erection or maintenance of the work, or any part thereof, embraced in this contract and these specifications, shall be included in the prices stipulated in this contract for this work and the owner must protect and save harmless the City, in which this work is being done, against any and all demands of such claims.
(2) Water. Should the owner require water from existing mains for the construction of any part of the work specified herein, he shall make application to the proper authority to obtain such water and shall conform to all regulations governing quantity, method of measurement and payment for water used.
(3) Street openings. The City, in which the work included in this contract is located, shall have the right to remove any pavement, to lay or relay any gas, water, sewer lines, conduits or connections or to build or rebuild any sewers, catchbasins, water mains or conduits during the progress of the work, before its completion or during the period of paving guarantee after its completion.
(4) Flushing. The owner shall, at his own expense, sweep or flush the pavement as directed by the Engineer, for the purpose of inspection after completion of and again before release from guarantee.
(5) Barricades. The owner must maintain barricades at all cuts in the pavement or grade and at all materials, rollers or other equipment standing in the roadway. Red lights must be maintained upon barricades and at all other danger points between the hours of sunset and sunrise. The owner will be held responsible for all neglect that leads to damage or injury to person or property by reason of the construction herein contemplated.
(6) Inspection. An inspector for this construction will be appointed by the City. Before commencing work on this construction, the owner must give two days notice to the Engineer. The Inspector must be on the job at all times while construction is being carried on and check every operation.
(Ord. 538-55. Passed 4-4-55.)
(Ord. 538-55. Passed 4-4-55.)