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HomeMy WebLinkAbout302 - Specificaiton 36 Water Distributing Systemf RESOLUTION No. 302— A RESOLUTION OF THE BOARD OF TRUSTEES OF THE CITY OF NEWPORT BEACH ADOPTING SPECIFICATIONS _ NO. 36 FOR THE CONSTRUCTION OF A WATER DIS- TRIBUTION SYSTEM FOR DOMESTIC SUPPLY AND FIRE PROTECTION, STORAGE RESERVOIRS, PUMPING PLANTS AND APPURTENANCES THERETO, WITHIN THE SAID CITY OF NEWPORT BEACH. 0 0 0 0 0 Be it resolved by the Board of Trustees of the City of Newport Beach, the following Specifications to be known as Speci- fications No. 36, for the construction of a water distribution system for domestic supply and fire protection, storage reservoirs, pumping plants and appurtenances thereto, in the City of Newport Beach, and the same are hereby adopted. PLANS, PROFILES ETC. The work herein provided for is to be done in accordance with the plans, profiles and crose- sections on file in the office of the City Engineer of the City of Newport Beach, and in accord- ance with the resolution therefor, and all work shall, during its progress and on its completion, conform to the lines and levels which may, from time to time, be given by said City Engineer. quired; WORK TO BE DONE. Under these specifications the Contractor will be re- 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- sections in these specifications, the area in which the improve- ment hereinafter provided for is to be constructed. Z. To furnish all materials as hereinafter provided for and required for the construction and completion of the improve- ment in accordance with the plans and specifications and all labor, tools and equipment necessary for the performance of said work. 3. To lay and install the pipe fittings, hydrants and other appurtenances as hereinafter specified. - _ 1 • GENERAL REQUIREMENTS. WORK The Contractor shall, for the price bid, furnish all the materials to execute the work in every respect in a thorough and workmanlike manner, in accordance with the plans, and speci- fications and to the satisfaction of the Street Superintendent. MATERIALS AND SAMPLES. All materials must be of specified quality and fully equal to the samples, when samples are 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, who 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. EXAMINATION OF GROUND. Bidders must ermine and judge for themselves as to the location cf the proposed work, and the nature of the excavation to be made and the work to be done. SETTING STAKES. The Contractor shall give 24 hours notice in writing when he will require the services 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 stakes set for the lines, levels or measurements for 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 sub- ordinates may have failed to preserve, shall be borne by'the Con- tractor. PLANS AND SPECIFICATIONS. The Contractor shall keep upon the work a cogy of the plans and specifications, and access thereto shall at all times be accorded the Engineer or Inspector. INSPECTORS. The Contractor shall prosecute work only in the presence of an Engineer or Inspector, appointed by the Street Superintendent, 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 MONUMENTS. The Contractor shall not disturb any monuments or stakes found on the line of improvements, until ordered by the Engineer, and he shall bear the expense of resetting any monuments or stakes which may be disturbed without orders. REMOVING OBSTRUCTIONS. 019 The Contractor shall remove all trees, stones, debris and other obstructions that may be encountered in making said improvements. - 3 - • 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 protecting the same where they are exposed or dangerous to travel. BARRIERS, LIGHTS, ETC. The Contractor shall take all necessary measures to pro - teat the work and prevent accidents during construction, He shall maintain and provide all necessary barriers, guards, temporary 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 will, upon proper application by the Contractor,.be notified by the Street Superintendent, to move such property within a specified reason- able time, and the Contractor shall not interfere with said prop- erty 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. All loss or damage arising from any unforseen obstruc- tion or difficulties, either natural or artificial, which may be encountered in the prosecution of the, work, or from any action of - 4 .. • the elements, or from any act or omission not authorized by these specifications, on the part of the Contractor, or any agent or 1 person employed by him, shall be sustained by the Contractor. DEFECTIVE WORK. No work which 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 work, to point out said defect or deficiency during construction, and the Con- tractor shall oornect any imperfect work, whenever discovered, before the final acceptance of the work. PROTECTION OF WORK AND CLEANING.UP. The Contractor shall care for all work until final oom- pletion and acceptance. He shall remove all surplus material and rubbish from the work after its completion and before he make ap- plication for the acceptance of the work. FINAL INSPECTION. The Contractor shall notify the Street Superintendent when he desires a final inspection of the work, when the latter will, as soon as possible, make the necessary examination, and if the work is found in compliance with these specifications, the street superintendent will furnish the Contractor with a certifi- cate to that effect. ALLOWABLE VARIATION. When in these specifications a maximum or minimum, either in size, percentage or thickness, or relating to quality of char- acter or other matter, is allowed or prescribed, the work shall be - 5 - Q, 1. • accepted as in compliance therewith, if within such maximum or • minimum so allowed thereby. 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. 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 meeting at which it was passed. GRADING. Grading shall include all filling, the removal of all earth, sand,stone or all other material, of whatever nature it may be, and shall also include all trimming and shaping required to bring the surface to grade and crose- section. Men 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 sink under or creep in front of the roller. The Contractor, however, will not be required in such cases to excavate the mud or other soft material to a depth greater than two (2) feet below the grade. MIE • 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 one foot 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 improper nature, shall be used in filling. The space over which fills are to be made, shall first be cleared of all brush, timber, trash or debris unfit for foundation. CONCRETE. CLASS A CONCRETE for sidewalls and floors of reservoirs, and floors of buildings shall be composed of the following materials: 1. Portland Cement - 1 part by measure 2. Sand or stone screenings - 2 parts by measure 3. Gravel or broken stone - 3 parts by measure CLASS-'-B CONCRETE for foundations of engine and pump bases, buildings and reservoirs shall be composed of the following materials: 1. Portland Cement - 1 part by measure 2. Sand or stone screenings - 2 parts by measure 3. Gravel or broken stone - 4 parts by measure. CLASS C CONCRETE for foundations and encasing of pipe, valves and fittings shall be composed of the following materials: - 1. Portland Cement - 1 part by measure 2. Sand or stone screenings - 3 parts by measure 3. GGravel or broken stone - 6 parts by measure A sack of cement weighing ninety -four (94) pounds net shall be considered as having a volume of one cubic foot. 7 - • CONCRETE MATERIALS • CEMENT. All cement used shall be Portland cement, and must con- form 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 conditions prescribed in Specifications 09 -17 adopted by the American Society for Testing Materials in 1916. (a) CONSISTENCY: All cement for set tests, test pate, 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 referred to. Neat briquettes will be pressed into the moulds by hand, and the mortar briquettes will be compacted by light tapping. Mortar briquettes shall be mixed to a state of plasticity corresponding 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 thirty minutes, but must develop hard set in not less than one hour, nor more than ten hours. 00 (d) TENSILE STRENGTH: Neat briquettes one inch square in section shall attain a minimum tensile strength as follows: At 24 hours in moist air, 175 pounds. pounds. At 7 days (1 day in moist air, 6 days in water), 500 pounds. At 28 days (1 day in moist air, 27 days in water), 600 Q� • r Briquettes one inch square in section, made of one part of cement, three parts of standard testing sand, shall attain a minimum tensile strength as follows: pounds. pounds. At 7 days (one day in moist air, 6 days in water) 200 At 28 days (one day in moist air, 27 days in crater), 275 The sand test must in all cases show an increase in strength at 28 days over the 7 day tests. (e) SOUNDNESS: Pate 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 at normal temperature. The water shall then be heated to boiling temperature and maintained for three hours. These pate, to satisfactorily pass requirements, must re- main firm and hard, and must not show any signs of distortion, checking, cracking, blotching or disintegrating. SAND. All sand must be free from oil or organic matter and must not contain more than five per cent, by volume, of clay, silt, loam or other foreign substances. Not less than 90 per cent, by weight, of the sand shall pass a screen having 4 meshes to the lineal inch; at least 50 per cent, bqt not mare than 85 per cent, by weight, shall be retained on a screen having 30 meshes to the lineal inch. Briquettes one inch square in section, made of one part of cement, conforming to these specifications, and three parts of the above sand, shall gttain a minimum tensile strength equal to that requirdd - 9 - for standard sand at equal periods of time. • STONE SCREENINGS. Stone screenings shall be such as are obtained in the crushing of clean, hard and durable stone and shall be that portion which has passed through a one - quarter inch mesh screen, and shall otherwise conform to the requirements for sand above specified. GRAVEL. Gravel shall be clean, hard, free from more than five per cent, by weight, of sand, and shall have sizes ranging from one- quarter inch minimum, up to a size passing through a one -inch ring for Class A Concrete, and through a 2 1/2 inch ring for classes B & C Concrete. Not less than 30 per cent of its volume shall be material which will pass a three- quarter inch screen. BROKEN STONE: Broken stone shall be the run of the crusher, except, however, that not more than five per cent of its volume shall be material which will pass through';a one- quarter inch mesh screen, not less than 30 per cent of its volume shall be material which will pass a three - quarter inch mesh screen. It shall be clean, hard and durable in quality, and shall range in size from the minimum noted above up to such size as will pass a one inch ring for Class A Concrete, and a 2 1/2 inch ring for Classes B and C Concrete. 0 WATER water shall be clean, free from oil, acid, alkali or vegetable matter. The maximum amount of water to be used in a batch, composed of one sack of Portland Cement, two parts of sand or stone screenings and four parts of gravel or broken stone shall - 10 - • 00 not exceed 70 pounds, which includes water already in the concrete materials,.and in measuring the water, allowance shall be made for water contained in said materials. MORTAR Should there not be enough mortar, to completely fill the voids in the concrete, the deficiency shall be remedied by re- ducing the portion of gravel or broken stone used in the mixture and not by adding a greater portion of sand or stone screenings. MEASURING MATERIALS The sand or stone screenings and the gravel or broken stone shall be measured in wheelbarrows which, when struck with a straight edge resting upon the sides, shall have the capacity necessary to accurately maintain the above proportions. Every wheelbarrow load of material must be struck with a straight edge as above described, 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. MIXING CONCRETE. All mixing of concrete shall be done in a batch mixer. The mixer shall be charged with cement and sufficient sand or stone screenings and gravel or broken stone to comform to the proportions hereinbefore stated. Sufficient water, not in excess of the quantity,above specified, shall be added to produce a plastic or - 11 - • quaking concrete which can be handled without causing a separ *tion • 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 least 75 seconds must elapse between the placing of successive batches in the mixer. CONSISTENCY OF CONCRETE. The concrete, after being mixed as hereinbefore specified, shall, when subjected to the following test, have a slump of not less than eight per cent nor more than twenty -five per cent. The slump test shall be made in the following manner: The test tube to be used in making the slump test shall have an inside diameter of eight inches at the base and an inside diameter of four inches at the top, and a perpendicular height of twelve inches. Immedi- ately after the concrete has been mixed and deposited on the sub - grade, a sufficient quantity thereof shall be placed in four .layers in the tppered test tube until the concrete is flush with the top of the 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 slump. After the pile of concrete has set one minute, its height shall be measured and subtracted from the original height of twelve inches, which difference in height is the amount of the slump in inches from which the percehtage bf slump shall be determined. 09 PLACING CONCRETE. Mixed concrete shall immediately be placed in position and tamped and rammed until it is thoroughly compacted and free mortar appears on the surface. Work shall be carried along the greatest possible length so as to avoid concentrated shrinkage - 12 - • and formation of cracks. Tall work shall be thoroughly spaded • until all cavities are filled and the material next to the surface of the forms is all mortar. Floor concrete shall be placed between forms and on well wet and tamped earth, brought to a true surface. It shall be thoroughly tamped, struck off to a true, smooth surface. The surface shall be floated smooth. Joints are to be left clean and clear for asphalt filler. Old work must be brushed clean and free of all deposits before starting new work, and if necessary, must be chiseled to present a roughened surface, and an ample amount of neat cement must be sprinkled over the previous work before the new work is join6d on. CEMENT WASH FOR RESERVOIRS As soon as the cement in the walls or floor has hardened, the surface shall be given a brush coat finish of cement wash, composed of neat cement and water mixed to a consistency of rich cream. Whenever pin -holes or bubbles develop on the surface, another coats must be applied. ASPHALTUM All joints wherever shown upon the plans are to be filled with Grade "E" Asphaltum, and the top of the footings shall be painted with one coat of Water -proof paint. CEMENT MORTAR FINISH OR WEARING SURFACE. PROPORTIONS. Cement mortar finishing coat shall be composed of : One (1) part of Portland Cement; and one and one -half (1 1/3) parts of sand or stone screenings. 13 - 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 least three times dry. It shall then be wet with sufficient water to produce a consistency which will not re- quire tamping, but which can be easily spread into position, turned twice and immediately put in place as hereinafter described. DEPOSITING. Gearing surface shall be placed immediately after mixing. The surface of the finishing coat shall be well floated and thoroughly and smoothly troweled 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 walk must show an even, true surface free from sage, humps, pits or other defects. REINFORCING STEEL. All steel for reinforcing shall be true to size and shape and free from imperfections; such as injurious seams, blis- ters, buckles, cinder spots, cracks or imperfect edges. It shall be free from oil, grease, paint, or rust scale. Steel for rein- forcing bars shall have an ultimate tensile strength of 60,000 pounds per square inch, an elastic limit of not less than one -half of the ultimate tensile strength, and shall bend cold 1800, showing no flaws or cracks. PROTECTION & CURING CONCRETE. The side walls and bottom of reservoirs and floors and foundations of buildings and engine bases shall be kept wet con- tinuously for at least ten days after being placed. LUMBER FOR RESERVOIRS AND BUILDINGS. All lumber shall be of the grade commonly known as Mer- chantable No. 1, dry and thorouEAly seasoned, strong and sound, - 14 - 4 � • free from loose or rotten knots, knot holes, splits, shakes, wane, • rot, pitch seams (open on both sides of piece) or other defects that will materially impair the strength of the piece, well manufactured and suitable for good and substantial construction purposes. The lumber shall be of the dimensions and variety as designated on the plans. CARPENTER WORK. All work shall be executed in a thorough and workmanlike manner in accordance with the plans. CAST IRON PIPE and SPECIAL CASTINGS. The pipes shall be made with hub and spigot joints and shall accurately conform to the dimensions given in Tables Nos. 1 and 2 herein. They shall be straight and shall be true circles in section, with the inner and outer surfaces concentric, and shall be of the specified dimensions in outside diameter. They shall be at.least 12 feet in length, exclusive of socket. All pipes having the same outside diameter shall have the same inside diameter at both ends. The inside diameter of the lighter pipes of each standard outside diameter shall be gradually increased for a distance of about 6 inches from each end of the pipe so as to obtain the required standard thickness and weight for each size and class of pipe. Special castings shall be furnished, made from Class D pattern. Those having spigot ends shall have outside diameters of spigot ends midway between the two standards of outside diameter as shown by Table No. 1, and shall be tapered back for a distance of 6 inches. ALLOWABLE VARIATION IN DIAMETER OF PIPES AND SOCKETS: Especial care shall be taken to have the sockets of the required size. The sockets and spigots will be tested by circular - 15 — gauges, and no pipe will be received which is defective in joint- room from any cause. The diameters of the sockets and the outside diameters of the spigot ends of the pipes shall not vary from the standard dimensions by more than .06 of an inch. ALLOWABLE.VARIATION IN THICKNESS. For pipes whose standard thickness is less than 1 inch, the thickness of metal in the body of the pipe shall not be more than .08 of an inch less than the standard thickness, and for pipes whose standard thickness is 1 inch or more, the variation shall not exceed .10 of an inch, except that for spaces not exceeding 8 inches in length in any direction, variations from the standard thickness of .02 of an inch in excess of the allowance above given sla 11 be permitted. For special castings of standard patterns a variation of 50 per cent greater than allowed for straight pipes shall be permitted. DEFECTIVE SPIGOTS MAY BE CUT. Defective spigot ends on pipes may be cut tuff in a lathe and a hilf round wrought iron band shrunk into a groove out in the end of the pipe. Not more than 12 per cent of the total number of accepted pipes of each size shall be out and banded, and no pipe shall be banded which is less than 11 feet in length, exclusive of the socket. In case the length of a pipe differs from 12 feet, the standard weight of the pipe given in Table No. 2 shall be modified in accordance therewith. 09 SPECIAL CASTINGS: All special castings shall be made in accordance with the dimensions given in the Tables forming a part of these specifications. - 16 - • The diameters of the sockets and the external diameters • of the spigot ends of the special castings shall not vary from the standard dimensions by more than .12 of an inch. These variations apply only to special castings made from standard patterns. The flanges on all manhole castings and manhole covers shall be faced true and smooth, and drilled to receive bolts of the sizes given in the Tables. The manufacturer shall furnish and de- liver all bolts for bolting on the manhole covers, the bolts to be of the sizes shown on plans and made of the best quality of mild steel, with hexagonal heads and nuts and sound, well- fitting threads. MARKING: Every pipe and special casting shall have distinctly cast upon it the initials of the maker's name. Each pipe shall also have cast upon it figures showing the year in which it was cast and a number signifying the order in point of time in which it was cast, the figures denoting the year being above and the number below, thus: 1922 1922 1922 1 2 3 etc., also the initials N.B.W.D. The letters and figures shall be cast on the outside and shall not be less than 2 inches in length and 1/8 of an inch in relief. The weight and the class letter shall be conspicuously painted in white in the inside of each pipe and special casting after the coating has become hard. ALLOWABLE PERCENTAGE OF VARIATION IN WEIGHT: No pipe shall be accepted the weight of which shall be less 00 than the standard weight by more than 5 per cent, and no excess above the standard weight of more than the given percentage shall be paid for. The total weight to be paid for shall not exceed the sum of the standard weights of the same number of pieces by more than 2 per-cent. - 17 - . No special casting shill be accepted the weight of which shall be less than the standard weight by more than 10 per cent, except that curves, Y- pieces and breeches pipe may be 12 per cent below the standard weight, and no excess above the standard weight of more than the above percentages for the several sizes will be paid for. These variations apply only to castings made from the standard patterns. UALITY OF IRON. All pipes and special castings shall be made of cast iron of good quality, and of such character as shall make the metal of the castings strong, tough and of even grain, and soft enough to satisfactorily admit of drilling and cutting. The metal shall be made without any admixture of cinder iron or other inferior metal, and shall be remelted in a cupola or air furnace. The Contractor shall have the right to make and break three bars from each heat or run of metal, and the test shall be based upon the average results of the three bars. Should the di- mensions of the three bars differ from those given below, a proper allorRance therefor shall be made in the results of the tests. TESTS OF MATERIAL, Specimen bars of the metal used, each being tmenty -six inches long by two inches wide and one inch thick, shall be made without charge as often as the engineer may direct, and in default of definite instructions, the contractor shall make and test at least one bar from each heat or run of metal. The bars when placed flatwise upon supports twenty -four inches apart, and loaded in the center, shall support a load of 2,000 pounds, and show a deflection of not less than .30 of an inch before breaking; or if preferred, tensile liars shall be made which will show a breaking point of not less than 20,000 pounds per square inch. - 18 - � f CASTING OF PIPE • The straight pipes shall be cast in dry sand molds in a vertical position. Pipes shall be cast with the hub end up or down, as specified in the proposals. The pipes shall not be stripped or taken from the pit while shoring color of heat, but shall be left in the flasks for a sufficient length of time to prevent unequal contraction by sub- sequent exposure. QUALITY OF CASTINGS: The pipes and special castings shall be'smooth, free from scales, lumps, blisters, sand holes and defects of every nature which unfit them for the use for which they are intended.. No.plrug- ging or filling will be allowed. CLEANING AND INSPECTION All pipes and special castings shall be thoroughly cleaned and subjected to a careful hammer inspection. No casting shall be coated unless entirely clean and free from rust, and approved in these respects by the engineer immediately before being dipped. COATING: Every pipe and special casting shall be coated inside and out with coal -tar pitch varnish. The varnish shall be made from coal tar. To this material sufficient oil shall be added to make a smooth coating, tough and tenacious when cold; and not brittle nor with any tendency to scale off. Each casting shall be heated to a temperature of 300 degrees Fahrenheit immediately before it is dipped, and shall possess not less than this temperature at the time it is put in the vat. The ovens in which the pipes are heated shall be so arranged that all portions of the pipe shall be heated to an even - 19 - R temperature. Each casting shall remain in the bath at least five minutes. The varnish shall be heated to a temperature of 300 degrees Fahrenheit (or less if the engineer shall so order) and shall be maintained at this temperature during the time the cast- ing is immersed. Fresh pitch and oil shall be added when necessary to keep the mixture at the proper consistency, and the vat shall be emptied of its contents and refilled with fresh pitch when deemed necessary by the engineer. After being coated the pipe shall be carefully drained of the surplus varnish. Any pipe or special casting that is to be recoated shall first be thoroughly scraped and cleaned. HYDROSTATIC.TEST When the coating has become hard, the straight pipes shall be subjected to a proof by hydrostatic pressure, and, if required by the engineer, they shall also be subjected to a hammer test under this pressure. The pressure to which the different sizes and classes of pipes shall be subjected are as follows: ClassBPipe - - - - - - - - - Class C Pipe - - - - - - - - - POWER OF ENGINEER TO INSPECT. 20 -inch diameter Less than 20 -inch and larger Diameter Pounds per Pounds per Square inch. Square inch. 200 300 250 300 The Engineer shall be at liberty at all times to inspect the material at the foundry, and the moldings, castings and coat- ing of the pipes and special castings. The forms, sizes, uni- formity and conditions of all pipes and other castings herein referred to shall be subject to his inspection and approval, and he - 20 - • may reject, without proving, any pipe or other casting which is • not in conformity with the specifications or drawings. 00 INSPECTOR TO REPORT: The inspector at the foundry shall report daily to the foundry office all pipes and,speoial castings rejected, with the causes for rejection. CASTINGS TO BE DELIVERED SOUND AND PERFECT: All the pipes and other castings must be delivered in all respects sound and conformable to these specifications. The in- spection shall not relieve the contractor of any of his obliga- tions in this respect, and any defective pipes or other castings which may have passed the engineer at the works or elsewhere shall be at all times liable to rejection "when discovered, until the final completion and adjustment of the contract; provided, however, that the contractor shall not be held liable for pipes or special castings fowhd to be cracked after they have been accepted at the point of delivery. Care shall be taken in handling the pipes not to injure the coating, and no pipes or other material of any kind shall be placed in the pipes during transportation at or any time after they have received the coating. - 21 - TABLE 1 • STANDARD DIMENSIONS OF CAST IRON PIPE Nominal Classes Actual Diameter of Sockets Depth of Sockets Diameter of outside of pipe pipe diameter Pipe Special Pipe Special in inches of pipe inches castings inches castings inches inches inches 4 B-04D 5.00 5.80 5.70 3.50 4.00 6 B-C -D 7.10 J 7.90 7.80 3.50 4.00 8 B 9.05 9.85 10.00 4.00 4.00 8 C -D 9.30 10.10 10.00 4.00 4.00 10 B 11.10 11.90 12.10 4.00 4.00 10 C -D 11.40 12.20 12.10 4.00 4.00 12 B 13.20 14.00 14.20 4.00 4.00 12 C -D 13.50 14.30 14.20 4.00 4.00 14 B 15.30 16.10 16.10 4.00 4.00 14 C -D 15.65 16.45 16.45 4.00 4.00 16 B 17.40 18.40 18.40 4.00 4.00 16 C -D 17.80 18.80 18.80 4.00 4.00 18 B 19.50 20.50 20.50 4.00 4.00 18 C -D 19.92 20.92 20.92 4.00 4.00 TABLE 2. STANDARD THICKNESS AND WEIGHTS OF CAST IRON PIPE BASED UPON 12 FOOT LENGTHS. Nominal :C =LASS -B C LASS - C C LASS -D inside diameter Weight Weight Wgt. inches Thickness er foot Thickness er ft. Thickness er ft. 4 0.4 1. 3.3 U.52 6 0.48 33.3 0.51 35.8 0.55 38.3 8 0.51 47.5 0.56 52.1 0.60 55.8 10 0.57 63.8 0.62 70.8 0.68 76.7 . 12 0.62 82.1 0.68 91.7 0.75 100.0 14 0.66 102.5 0.74 116.7 0.82 129.2 16 0.70 125.0 0.80. 143.8 0.89 158.3 18 0.75 150.0 0.87 175.0 0.96 191.7 -22_ . SPECIFICATIONS FOR VALVES. • CASTINGS. All irnn castings shall be made from a superior quality of iron, remelted in cupola or air furnace, tough and of even grain, and shall possess a tensile strength of 22,000 pounds per square inch. The castings must be clean and perfect, without blow or sand holes or defects of any kind. No plugging or stop- ping of holes will be allowed. TEST BARS: Specimen bare of the metal used each being 26 inches long by 2 inches wide and 1 inch thick, shall be made without charge as often as the engineer may direct and in default of def- inite instructions the Contractor shall make and test at least one bar from each heat or run of metal. The bare when placed flat -wise upon supports 24 inches apart and loaded in the center, shall sup- port a load of 2200 pounds and show a deflection of not less than .35 of an inch before breaking; or if preferred, tensile bare shall be made which will show a breaking point of not less than 22,000 pounds per square inch. Bare to be cast as nearly as possible to the dimensions without finishing, but corrections maybe made by the Engineer for variations in width and thickness and the corrected result must conform to above requirements. MAKER'S NAME: Each valve shall have the maker's name cast upon it. WROUGHT IRON: All wrought iron used shall be of the best quality of refined iron, of a tensile strength of at least 45,000 pounds per square inch. COMPOSITION METALS: All composition metals to be of the best quality, and, _ 23 _ . except.the stems, to have a tensile strength of not less than • 30,000 pounds per square inch with 5 per cent elongation in 8 diam- eters, and 5 per cent reduction of area at lgreaking point. FACE JOINTS: All joints shall be faced true and smooth, so as to make, with suitable gaskets, a perfectly watertight joint. FITTINGS AND INTERCHANGEABLE PARTS: The fittings of all parts must be such as make perfect joints and all parts of the valves of the same make and the same size shall be interchangeable. Valves to open as specified by the engineer. BOLTS AND NUTS: All bolts and nuts in valves to be made from the best quality of double refined wrought iron or steel, heads, nuts and threads to be standard sizes. KINDS OF VALVES: Valves shall be fully mounted with bronze or suitable noncorrodible metal, and be either of the double disc or made up gate type with bronze or suitable noncorrodible metal mounted wedg- ing devices or have wedge shaped gates with double faces and seats, designed to work equally well with pressure on either side of the gate. The gates (or discs) shall be of cast iron with bronze or suitable noncorrodible metal faces. These faces shall be machined, dovetailed and driven into corresponding machined grooves in gates (or discs) or riveted on with bronze or suitable noncorrodible metal rivets. The seats for composition rings in body of valve shall be turned and threaded before rings are screwed in. - 24 -,. • SEAT AND GATE RINGS: • Both seat rings and gate (or disc) rings shall have smooth and true faces, and make a perfectly watertight joint. WEIGHT: Valves without by- passes shall be approximately not less than the following weights for the respective sizes: 4 -inch 85 pounds 6 -inch 180 pounds 8 -inch 255 pounds 10 -inch 400 pounds 12 -inch 500 pounds 14 -inch 780 pounds 18 -inch 1290 pounds VALVE STEMS: STEMS: Valve stems shall be made of solid brass or suitable non - corrodible metal, free from defects, and shall have a tensile strength of not less than 45,000 pounds per square inch. THREADS: Threads on stems to be square, some or 1 /2V, and out in most perfect manner, so as to work true and smooth and in perfect line throughout the lift of the valve. SIZE OF STEMS: Valve stems at the bottom or base of the thread shall not be less than the following sizes in diameter: -25- WRENCH NUT: The wrench nut on stem shall be 2 inches square with arrow cast on showing direction which way valve is to turn to open. PAINTING: All iron work, after being thoroughly cleaned, to be painted throughout with asphaltum varnish, or suitable paint, or dipped in suitable coating material. TESTING: Valves must be tested for leakage and distortion as follows: On double disc or made up gate type, the body of the valve shall be drilled and tapped with a hole for pipe and a re- movable plug inserted, through this hole an hydraulic pressure of 125 pounds per square inch shall be applied; the wedge shaped gate type by an hydraulic pressure of 125 pounds per square inch applied, first between one end and the gate, second between the opposite end and the gate, and third in the bonnet with gate open. TYPE: SPECIFICATIONS FOR HYDRANTS. GENERAL DESIGN. Hydrants may be of compression or gate type. -26- 4-inoh valve 55/64 inch • 5 -inch valve 55/64 inch 6 -inch valve 1 inch 7 -inch valve 1 inch 8 -inch valve 1 inch 9 -inch valve 1 8/64 inch .10 -inch valve 1 8/64 inch 12 =inch valve 1 12/64 inch 14 -inch valve 1 12/64 inch 18 -inch valve 1 28/64 inch WRENCH NUT: The wrench nut on stem shall be 2 inches square with arrow cast on showing direction which way valve is to turn to open. PAINTING: All iron work, after being thoroughly cleaned, to be painted throughout with asphaltum varnish, or suitable paint, or dipped in suitable coating material. TESTING: Valves must be tested for leakage and distortion as follows: On double disc or made up gate type, the body of the valve shall be drilled and tapped with a hole for pipe and a re- movable plug inserted, through this hole an hydraulic pressure of 125 pounds per square inch shall be applied; the wedge shaped gate type by an hydraulic pressure of 125 pounds per square inch applied, first between one end and the gate, second between the opposite end and the gate, and third in the bonnet with gate open. TYPE: SPECIFICATIONS FOR HYDRANTS. GENERAL DESIGN. Hydrants may be of compression or gate type. -26- • CHANGE IN DIAMETER, • Any change in diameter of the water passage througlk, he hydrant must have easy curve, and all outlets must have rounded corners of good radius. WATER HAMMER: Hydrants must be so designed, particularly as regards the pitch of the thread of the operating stem, that, when properly oper- ated a water hammer will not be caused which will give an increased pressure`to exceed the working pressure, when such pressure is over 60 pounds, nor increase the pressure more than 60 pounds when oper- ated under less working pressure than 60 pounds. BROKEN HYDRANT: Valves when shut must remain reasonably tight when upper portion of barrel is broken off. FRICTION LOSS: With a 5 -foot hydrant discharging 250 gallons per minute, through each 2 1/2 inch outlet, the total friction loss of the hy- drant must not exceed 2 pounds for two -way, 3pounds for three -way, and 4 pounds for four -way hydrants. STRAPPING: When requested, hydrants must be fitted with 2 lugs, so that the leaded joint underground can be strapped. FLANGE JOINTS ABOVE GROUND: 0 When hydrant barrel -is made in two sections, the upper flange connection must be at least 2 inches.above the ground line. MATERIAL HYDRANT BODY: The hydrant body must be made of cast iron. - 27 - . CAST IRON: • All castings shall be made from a superior quality of iron, remelted in cupola or air furnace, tough and even grain, and shall possess a tensile strength of 22,000 pounds per square inch. The casting must be clean and perfect, without blow or sand holes, or defects of any kind. No plugging or stopping of holes will be allowed. SPECIMEN BARS: Specimen bare of the metal used, each being 26 inches long, by 2 inches wide, and 1 inch thick, shall be made without charge, as often as the engineer may direct, and in default of def- inite instructions, the contractor shall make and test at least one bar from each heat or run of metal. The bare when placed flat - wise upon supports 24 inches apart, and loaded in the center, shall support a load of 2200 pounds, and show a deflection of not less than 0.35 of an inch, before breaking; or, if preferred, tensile bare shall be made which shall show a breaking point of not less than 22,000 pounds per square inch. Bare must be cast as nearly as possible to the dimensions without finishing, but corrections may be made by the engineer for variations in width and thickness, and the corrected result must conform to the above requirements. MOUGHT IRON: All wrought iron shall be of the best quality of refined iron of a tensile strength of at least 45,000 pounds per square inch. COMPOSITION 'METALS : All composition or other non - corrodible metals used to be of the best quality, to have a tensile strength of not less than 32,000 pounds per square inch, with a 5 per cent reduction of area at breaking point. EIR-M HOSE NIPPLES AND VALVES • HOSE NIPPLES: Hose nipples must be of bronze or suitable non - corrodible metal, either threaded with fine thread. into the hvdrants and secure- ly pinned in place, or carefully locked and caulked in place. HOSE THREADS: Hose threads on all hydrants to be installed in any given community must of necessity be interchangeable with those al- ready in service, but, where practicable, threads should conform to the National Standard. SEAT: HYDRANT SEAT AND GATE The seat must be made of bronze or suitable non - corrodible metal, securely fastened in place. VALVE: The valve must be faced with a yielding material, such as rubber or leather, except that, if of the gate type, a bronze ring may be used. The valve must be designed so that it can be easily removed for repairs without digging up the hydrant. DRIP VALVE. DRIP: A positively operating non - corrodible drip valve must be provided and arranged so as to properly drain the hydrant when the main valve is closed. The seat for the waste valve, which must be fastened in the hydrant securely, must be made of non - corrodible material. All other parts of the drip mechanism must be so designed as to be easily removed without digging up the hydrant. OPERATING PARTS. OPERATING THREADS: -29- A OPERATING THREADS: The .operating threads of the hydrant must be so arranged as to do away with the working of any iron or steel parts against iron or steel. Either the operating screw or the operating nut must be made of non - corrodible metal, and sufficiently strong to perform the work for which intended. TOP NUT: The stem must terminate at the top in a nut of pentagonal shape, finished with slight taper to 1 1/2 inch from point to flat, except for hydrants to be installed where existing hydrants have different shape or size of nut, in which case the additional hy- drants must have operating nuts similar to the old one for uniform- ity. The nut socket in the wrench must be made without taper, so as to be reversible. STUFFING B0X AND GLAND. STUFFING BOX: The stuffing box and gland must be of bronze or suitable non - corrodible metal, or bushed with bronze or suitable non- corrod- ible metal, when an iron or steel stem is used, or when an iron operating stem nut passes through the stuffing box. When packing nut is used, it must be made of bronze or suitable non- corrodible metal. The bottom of the box and end of the gland or packing nut must be slightly beveled. GLAND BOLTS: ,Gland bolts or stubs must be at least 1/2 inch in diameter. Bolts or etude may be either of bronze or suitable non - corrodible metal, iron or steel. The nuts must always be of bronze or suitable non - corrodible metal. - 30 - El • TOP: HYDRANT TOP. The hydrant top.must be designed so as to make the hydrant as weather proof as possible, and thus overcome the danger from water getting in and freezing around the stem. Provisions must be made for oiling, both for lubrication and to prevent corrosion. A reasonably tight fit should be made around the stems. LETTERING: There must be cast on top of the hydrant in characters raised 1/8 inch, an arrow at least 2 1/2 inches long, and the word "open" in letters 1/2 inch high and 1/8 inch in relief, indicating direction to turn to open the hydrant. CAPS: HOSE CAP. Hose caps must be provided for all outlets, and must be securely chained to the barrel with a chain constructed of material not less than 1/8 inch in diameter. CAP NUT: The hose cap nut must be of the same size and shaperas the top or operating nut. WASHER IN CAP: 77hen requested by the purchaser, a leather, rubber or lead washer must be provided in the hose cap, set in a groove to MO prevent its falling out when the dap is removed. MARKING: MARKINGS. The hydrant must be marked with the name or particular mark of the manufacturer. All letters and figures must be cast on - 31 - ,.z_ • the hydrant barrel above the: ground line. • TESTING TESTING: Hydrants assembled, shall be tested by hydraulic pressure to 200 pounds per square inch, before leaving the factory. The test must be made with the valve open in.order to test the whole barrel for porosity, and strength of hydrant body. A second test must be made with valve shut, in order to test the strength and tightness of the valve. All pipe shall be laid in an open trench. The minimum width of excavation for pipes and fittings shall not be less than six (6) inches wider on both sides of pipes or fittings. The ex- cavation shall be made a sufficient distance below the depth indicated by the grade line on the profile and shown by the grade stakes set by the engineer to allow for thickness of pipes or fit- tings, and of hubs. Should, however, the trench be excavated to a depth greater than that herein above last mentioned the Contractor shall refill such excess excavation with sand. The Contractor shall at all times during the progress of the work keep the trenches and excavations free from water until the backfilling has been com- pleted. All soft and spongy earth or material below sub -grade not to exceed two (2) feet in depth, shall be removed by the Con- tractor and replaced with screened gravel which shall be tamped - until solid. LAYING PIPE After the trench has been brought to the proper line and grade in the manner above specified, the pipe shall be laid therein in the following manner:- - 32 - purpose and in securing a tight and permanent joint. Gaskets of clean, sound hemp yarn braided or twisted and tightly driven. Be- fore running the lead the joints shall be carefully wiped out to make them clean and dry. The joint shall be run full of lead, and the melting pot shall always be kept within fifty (50) feet of the joint about to be poured. The joint shall be caulked by competent mechanics. The caulking to be faithfully executed, and in such a manner as to secure a tight joint without overstraining the steel of the bell. In all cases the caulking shall be done towards the place of the gate, and other points where the lead is likely to be porous. The lead after being driven shall be flush with the face of the socket. BACKFILLING TRENCH After the pipe laid has been tested as hereinafter pro- vided for, the trench shall be 17ackfilled with the same material excavated from the trench, and carefully packed and well rammed with proper tools uOer and around the body of the pipe and fit- tings, as well as the fill over the top of the pipe and fittings. Surplus material not required in refilling the trench shall be evenly and uniformly spread over the ground adjacent to the trench. TESTING PIPE AND FITTINGS FOR LEAKAGE 8(fter the pipe has been laid it will be subjected to a 33 - Before any pipe is put into place the trench bottom shall • be prepared so that each pipe shall have a firm and unfform bearing over its entire length. All adjustment to line and grade must be made by scraping away or filling in the earth under the body of thq pipe, and not by wedging or blocking up the ends. The lead used for caulking the joints of all pipe shall be of the best quality of pure and soft lead, and suitable for this purpose and in securing a tight and permanent joint. Gaskets of clean, sound hemp yarn braided or twisted and tightly driven. Be- fore running the lead the joints shall be carefully wiped out to make them clean and dry. The joint shall be run full of lead, and the melting pot shall always be kept within fifty (50) feet of the joint about to be poured. The joint shall be caulked by competent mechanics. The caulking to be faithfully executed, and in such a manner as to secure a tight joint without overstraining the steel of the bell. In all cases the caulking shall be done towards the place of the gate, and other points where the lead is likely to be porous. The lead after being driven shall be flush with the face of the socket. BACKFILLING TRENCH After the pipe laid has been tested as hereinafter pro- vided for, the trench shall be 17ackfilled with the same material excavated from the trench, and carefully packed and well rammed with proper tools uOer and around the body of the pipe and fit- tings, as well as the fill over the top of the pipe and fittings. Surplus material not required in refilling the trench shall be evenly and uniformly spread over the ground adjacent to the trench. TESTING PIPE AND FITTINGS FOR LEAKAGE 8(fter the pipe has been laid it will be subjected to a 33 - t 0 hydrostatic pressure test of 11V, pounds per square inch, held for Adk thirty (30) minutes, during which time no portion of the pipe or qW fittings laid shall show percolation. SPOIL BARKS The materials excavated shall be.laid compactly along the side of the trench, and kept trimmed up tle inconvenience as possible to the public street is not wide enoggh to hold the earth passageway on the sidewalk, the Contractor fence and keep a passageway - six feet wide walk. gates. so as to cause as lit- travel. In case the without stopping the Shall erect a board - open on said side- Free access must be left to all fire hydrants and water- MEASUREMENTS Main pipes will be measured horizontally from center to center of structure along the center line of the pipe service, in- cluding all specials. SURPLUS MATERIAL Surplus material not required in refilling the trench or tunnel shall be promptly removed by the Contractor as the beck- filling progresses and disposed of by him. UNGRADED STREETS. 'Whenever the pipe is built in any ungraded street, the trench shall be refilled to the original surface of the street; provided, however, that there shall not be less than three (3) feet of earth over the pipe; and, provided further that where a fill is required on which to construct the pipe, the fill shall be made of good, sound earth, built up in layers not more than one (1) foot thick, and the layers thoroughly compacted by rolling or tamping. Phere the trenches do not supply sufficient material df - 34 - t • the proper quality for making the fill, the Contractor shall supply • the deficiency. RESTORATION OF SURFACE OVER PIPES. In all public streets, alleys or other public places, and in pipe rights -of -way, the surface over and adjacent to the sides of the trenches shall, after being backfilled and prepared as specified in these specifications be restored by the Contractor without delay in a workmanlike manner with the same class of materials and constructed in the same manner as the surfacing or paving that was in place before the construction of the pipes was commenced. TYPE SPECIFICATIONS FOR 100 HORSEPOM DIESEL TYPE ENGINES. These engines shall be oil engines of the full Diesel type defined as engines in which the fuel is ignited solely by the heat generated by compression of the air contained in the working cylinder. This compression pressure shall be more than 480# and less than 510# per square inch. No part of the cylinder or head shall be heated by a torch or other means, for the purpose of vapor- izing or aiding the combustion of the fuel. The entire working sur- face of the cylinder and cylinder head shall be sufficiently water jacketed. No water or water vapor shall be injected to the working cylinder. WORKING CYCLE 40 The engine shall operate on the two stroke cycle with one working stroke in each cylinder, each revolution of the shaft. The ports for exhaust of the products of combustion and ports for the inlet of scavenging air, shall be located in the side of the cylinder wall and opening and closing of these ports shall be controlled by - 35 - . • the movement of the engine piston • or valve gear. FUEL INJECTION: There shall be no other valves The fuel injection shall be of the "airless injection" type in which the fuel is atomized and injected to the cylinder by a fuel pump delivering the fuel to the atomizing nozzle under pressure. DESIGN: The engine shall be of the vertical design and fully enclosed with an oil tight cast iron frame or enclosure. FUELS These engines shall be capable of burning California Asphalt base Diesel Engine fuel oil of 24 baume. ECONOMY The consumption of fuel oil at the rated load of 100 Brake Horse Power shall not exceed 1/2 pound per brake horsepower hour of 24.baume California Diesel Engine Oil. CYLINDERS There shall be'two cylinders each having a bore of not less than 14 inches in diameter, and the stroke of the piston shall be not less than ly inches. Each cylinder shall be completely water jacketed over its entire working surface. The cylinders shall be of a close grained iron cast from carefully selected material. The wprking bore shall be,round and true, with a smooth clean surface 40 throughout. CYLINDER HEADS The cylinder heads shall be of cast iron, removable, com- pletely water jacketed with visible overflow of the cooling water. PISTONS Pistons shall be of the trunk type having six accurately - 36 - 0 L fitted cast iron rings. The pistpns shall be of a close grain iron cast from carefully selected materials and accurately fitted to a proper working clearance in the-cylinder bore. PISTON PINS Piston Pins shall be of forged steel, hardened and ground. It shall be securely fastened in the piston and shall have a bearing in the connec4in g rod not less °than 6 1/4 inch x 7 3/8 inch. CONNECTING ROD Connecting rod shall be forged of open hearth steel of ample cross section to carry the load with a liberal margin of safety. At its upper end it shall be fitted with a high grade bearing bronze bored and scraped to fit the piston pin. At the lower or crank,end it shall be fitted with a crank pin box and cap of bronze lined with high grade babbitt, the whole being secured to the rod by two bolts less than 8" x 7 1/211. SHAFT The bearing in the crank pin shall not be The shaft shall be forged of open hearth steel machined all over anal. bearings accurately machined to size and polish. The cranks shall not be less than 8 inches in diameter, and the shaft bearings of which there shall be three, shall not be less than 7 1/2 inches in diameter 7 1/211 x 15 1 /4n FRAMES. The main bearing shall not be less than The engine frames shall be cast individually one for each cylinder. They shall be of ample section of cast iron to insure strength and rigidity. They shall be fitted with large manholes to give.access to the interior for adjustment of the bearings and securely bolted to both cylinder and subbase. - 37 - • SUB -BASE • The sub -base shall be a single iron casting machined to receive the removable shells for the shaft bearings and the frames supporting the cylinders. They shall be fully enclosed to protect the working parts of the engine and collect the oil which drips from the pins and bearings. LUBRICATION The working cylinders, each crank pin and each shaft bearing, shall be' lubricated from a standard type force feed oiler with visible and adjustable feeds. OUTBOARD BEARING, 'WHEEL & PULLEY The shaft shall be extended to carry a flywheel not less 78 inches in diameter, weighing not less than 3700 pounds. There shall also be a belt pulley of cast-iron not less than 60 inch diameter and 17 inch face. There shall be an outboard bearing of the ring oiling type adjustable and mounted on a machined cast iron sole plate. This bearing shall not be less than 5 inches in diam- eter by 15 inches in length. MATERIALS Cast iron shall be cast of a mixture suitable for Diesel engine service. The mixture shall be from new materials with the addition of not more than 20 per cent of steel or more than 20 per cent of approved scrap. The breaking stress (tensile) shall not be less than 28,000 pounds per square inch. FORGING 4r. Shall be of open hearth steel forged and heat treated, having a breaking stress of not less than 70,000 pounds and aii' elastic limit of not less than 35,000 pounds per square inch. Bronze parts except special bearing bronze shall be cast of new • material hnd have a breaking strength of not less than 50,000 pounds per square inch. Babbitt shall be from the genuine babbitt formula of 84% tin, 8% copper, 8% antimony, or its equivalent in value. SPEED The speed of the engine shall not exceed 260 revolutions per minute when operating at the maximum rated capacity. GOVERNOR The governor shall be of the centrifugal type, controlling the amount of fuel injected into the combustion chambers of the engines. It must be so constructed that the amount of each charge of fuel in exact proportion to th load being carried can be reg- ulated accurately. It must also be possible to decrease the speed of the engine 33 1/3 per cent below the normal speed while the engine is in operation. PAINTING All outside unfinished surfaces of the engines shall be thoroughly filled, rubbed smooth and given not less than three coats of dull black paint. AIR - STARTING EQUIPMENT Each engine shall have an auxiliary air starting set con- sisting of an engine direct coupled to an air compressor, both mounted on a single cast iron base. The engine shall be of standard gasoline type, having a working bore of 4 1/21f and a stroke of 6n, and shall deliver three Brake Horse Power at 475 revolutions per minute. The engine shall be water cooled by a cast iron hopper inolosing the cylinder. 39 - • The compressor shall have a bore of 3 3/411 and a stroke of 411. It shall be of vertical single cylinde" type,. also wateE cooled by means of a hopper inclosing the working barrel of the cylinder. There shall also be with each engine two air receivers made of wrought steel, each to resist safely a pressure of 250 pounds per square inch, rivetted in its longitudinal joints, each receiver being 2011 in diameter by 60" in length. Each pair of receivers shall be equipped with one pop safety valve designed for and set at a pressure of 250 pounds per square inch. Also a pres- sure gauge of 250 pounds per square inch capacity.. The shut -off valves for these receivers shall be of brass And designed to withstand safely a pressure of 250 pounds per square inch. The pipe connections shall be of standard steel screw pipe not less than 1 1/4" in diameter. EXHAUST SILENCER Each engine shall be equipped with an exhaust silencer of /2.i cast iron 4211 in diameter by 7211 in height, with a IM opening to /2- which shall be attached standard Winch diameter screw pipe extend- ing from the top of the cylinder to an elevation of not less than four feet.above the walls of the building. The weight shall be not less than 2600 pounds. The interior of the silencer shall consist of an open chamber extending for one -half of the length, the remainder of the length being taken up with a baffle through which the exhaust gases are deflected for the purpose of reducing the sound of the exhaust. CENTRIFUGAL PUMPS CAPACITY. Each pump shall have a capacity of not less than 800 gallons per minute when pumping against a total head of 280 feet, - 40 - • and the speed shall not exceed '1350 revolutions per minute. CONSTRUCTION Pumps shall be of the multi- stage, horizontally split shell type, having the casings and bearings parted on the hori- zontal center line parallel to the shaft, and the discharge and suc- tion openings in the lower half. Casings shall be made of cast iron, and the two halves provided with heavy flanges securely bolted together. The impellers shall be made of a single casting of bronze mounted on a steel shaft. The shaft shall be of forged carbon steel, accurately finished and ground, of ample size to carry the maximum power required by the pump, and provided with renewable bronze covers at portions which pass through the stuffing boxes, and at all points exposed to the water. The impellers shall be fitted with renewable bronze wearing rings accurately fitted into the casing of the pump. The pump shall be accurately balanced for axial thrust, and thrust bearings shall be provided to take care of any slight variation from the perfect balance with variation , in head. A stuffing box and gland shall be provided at each end, and shall be provided with water seals and bronze rater- sealed rings to prevent air being drawn into the pump and breaking the eiiction. The bearings shall be of the outboard, independent ring -oiled type consisting of a cast iron babbitted shell, centered by a machin4fit$M in a horizontally split bearing .- hqusing. The bearing shells shall be so constructed that the lubrication from the ring oilers is collected and evenly distributed over the entire bearing surface. The end of the pump shaft shall be fitted to re- ceive a flexible coupling. - 41 - • FLEXIBLE COUPLING, Flexible coupling joining the pump shaft with the pulley shaft shall consist of two steel discs, one fitted with steel pine extending into rubber lined holes bored in, the other disc to receive them. Pulley shafts shall be of steel with a self - oiling, bebbitt -lined box'4on each side of the pulley, which pulley shall be of cast iron IV in diameter by 171f face. Pump bearings and pulley bearings shall be mounted on a substantial cast iron bed plate made in box section, strongly ribbed, machined on its upper surface. There shall be a pressure gauge of 811 face, brass mounted, for a pressure of not less than 200 pounds per square inch, and a second gauge 80 face, brass mounted, suitable for a pressure of not less than 50 pounds per square inch. PAINTING All outside unfinished surfaces of the engines shall be thoroughly filled, rutbed smooth and given not less than three coats of dull black paint. LEATHER BELTING All belts are to be of leather made from the best selected, large steer hides, of pure oak -bark tannage. Each piece is to be of fine, close fibres and all pieces are to be scarfed to a uniform thickness. The individual pieces of the leather are to be thorough- ly stretched after currying and machine tested and the utmost stretch, within elastic limits, given to the belts when they have been made up complete. - The transverse lap joints are not to exceed four inches in longitudinal length, are to be scarfed in the best manner, thoroughly cemented and are to be made fast and durable without the use of pegs or rivets. All belt edges are to be properly rounded. All belts are to be thoroughly grater- proofed. The complete belts - 42 - . - • are to be soft, pliable and finished with smooth polished surfaces. Belts must run smoothly and straight on the pulleys. Belts 4 in- ches in width shall have a thickness of not less than 18/64 of an inch, and 12 inches in width not less than 24/64 of an inch. PRESSURE AIR VALVES. Pressure air valves must be designed with sufficient strength to resist the shocks of closing with the water pressure behind it. The ball float shall be made of the best quality of hard rubber, carefully machined and balanced. The cup and hangers must be designed to resist the internal stresses due to the current of water being checked when the valve closes. Hangers to be made of phospor bronze and so fastened between the valve body and the flange so as to be perfectly rigid and pro -d ded with lugs rhich bear against the inside of the body so that the cup is held firmly in place. The cup shall be made from a single piece of brass and without seams or joints. CHECK VALVES. All check valves shall be of the double cushioned type, and made of heavy cast steel mounted with bronze liner and piston. A regulating valve shall control the ports so that the speed of operation of the valve can be set. The valve must be so con- structed as to insure a smooth and effective closing of the same without rater hammer or shock. ALTITUDE VALVES. All control altitude valves shall be of the cushioned type, and shall be constructed of heavy cast steel, the upper por- tion of the valve body to be lined with bronze which shall be all one casting down to and including the seat. The main piston shall be bronze fitted with cups and seat rings to take all the weaf and prevent metal to metal seats. The valves must be so designed - 43 - . that they may be adjusted to automatically maintain an uniform water level in the reservoir. They must be sensitive to such a degree that they will operate in a variation of water level of not more than two inches. PRESSURE REG"LATING VALVES !'dater pressure regulating valves shall be constructed of heavy cast iron body, bronze mounted, air and dater cushioned, and must be so constructed as to eliminate crater hammer or shod. The valves must be so constructed as to permit adjustment to regulate the same to suit the pressure required. STEEL SASH DOORS, ETC. All windows shall be of the reversible ventilator type except as otherwise specified on the plans and specifications. All sash bars shall be made from solid rolled steel sections 1 3/811 deep. Frame members for sash to be unequal, leg channel section having one leg on the outside 1 5/811 long, the other leg on the inside to be 7/811 long. All corners of frames, as well as ven- tilators, shall be riveted and electric welded. All ventilator sash to be of the reversible type, properly balanced on arms made of good spring steel. These arms shall be piv6te6 to the support- ing frame and ventilator by bronze shoulder pivots. Sliding bronze friction shoes shall be used these shoes to have electro- galvanized springs adjusted to proper compression, all hardrare to be of bronze. All ventilators shall be provided with align- ment control springs. All ventilators of the swing -out type to be provided with a cam handle so deisgned that it may be operated either by hand or by pole. Ventilators of the swing -out type to be provided rith an automatic latch handle or a spring catch for pole or chain operation. Solid rolled steel vertical T -bar mullions shall be used between window units when two or tore windows occur in the same - 44 - a . c • opening. mullion covers of standard design to be furnished as interior trimming for mullions. The sash shall be glazed with. 1/411 wire glaze, and shall be bed puttied, and must be held in place by'7 /16 x 5/8 glazing angles. All doors and frames shall be made from heavy rolled, solid steel U- shaped panels butted together over solid corner castings, through - riveted mith counter sunk rivets to insure per- feat rigidity. Loner panels shall be provided with steel kick- plates to height of about four feet. The upper panels being glazed in the manner hereinbefore specified for sash. All hard - rare for latches or locks, butts ana weathering plates shall be of bronze. BRICK MASONRY. The brick masonry shall consist of whole, stout, straight, hard bricks laid in freshly mixed cement mortar to the forms and sections required. The bricks shall be thoroughly wetted and laid true to line in parallel courses, properly bonded, with face joints flush, and not exceeding 1/4 inch, and struck with the point of the trowel or pointed. Every brickfmust be laid in full, close joints of mortar on its bed, end, and side, at one operation. The best of the bricks shell be selected by the contrac- tor and used for face work. Broken bricks, not less than halves, may be used, if directed, in places not affecting the strength of the work. Every seventh course throughout shall be a header course. HrORTAR AND GROUTING. PROPORTION ^a: All mortar to be used in ;the building of masonry shall I be composed of 1 part of Portland cement to 3 parts of sand. The - 45 - a , • mortar for grouting, pointing, and bedding lintels and sills shall • be composed of 1 part. of Portland cement to 2 parts of sand. All of these mixtures shall be proportioned by measurement, and shall be first thoroughly mixed dry in suitable tight boxes, after which the' - proper amounts of water shall be gradually added. Only such quantities of mortar or grouting as are needed for-immediate use shall be mixed; if alloyed to set, it shall not be retempered and used in any masonry constmuction. �Pessed and approved thisad.ay of November, 1924. d President of the Board of Trustees. ATTEST: City Clerk. State of California County of Orange as. City of Newport Beach. City Clerk of the City of Newport Beach, do hereby certify y that the foregoing Resolution, being Resolution No. S, was regularly introduced and duly adopted by the Board of Trustees of said City, signed by Jghe President of sad Board, and attested by the City Clerk, all at a regular meeting thereof held on theday of November, 1924, and that the same was adopted by the fool/lowing vote, to -wit: 7 AYES: Trustees, NOES: Trustees, 4t "- ABSENT -i, c- Trustees. J' v c •C - 46