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HomeMy WebLinkAbout2000-00669TORONTO SPECIFICATION. Form KRevised March, igio. " CONCRETE SIDEWALK. Excavation=. K-1. The street referred to in the contract (of which this specification forms a part) is to be excavated and graded to the depth and width shown on the drawing having reference thereto, and to the levels given on the ground by the Engineer, and also to such greater widths and depths as may be required to enable the curbing to be properly set, or as the Engineer may direct. The levels and cross -sections may, however, be varied at the discretion of the Engineer to conform with the sills of buildings affected thereby, and the grades of intersect- ing streets. Consolidation K-2. All trenches or excavations that have been made for, or in connection with sewers, of Trenebes, etc• private drains, gas or water pipes, telephone or electric wires, pipes or conduits, or any other lawful purpose, and which are not thoroughly settled, shall be opened out and refilled, in six inch layers of gravel, well pounded, and watered if directed or necessary, until quite solid. Defective K-3. Soft, boggy, spongy, or defective places encountered in excavation or elsewhere, must places. be wholly removed to such depth and extent as may be required by the Engineer, and all such places made good, as specified in clause 2. Where gravel filling is used under clauses 2 or 3, no extra allowance will be made the contractor. Boulders, K-4. The contractor will be required to remove, without extra remuneration, all boulders, treee, etc. stones, rocks, stumps, roots, trees, walls or other obstructions .found upon the line of work, and fill up all areas or coal chutes for which no permits have been issued. All such filling to be of approved material, thoroughly rammed in six inch layers. The contractor to provide proper protection to prevent the filling from spreading on private property. Surplus K-5. No surplus material of an kind arising from the work or an portions thereof shall material P Y °e �' required by City. be sold, thrown away, dumped, wasted or otherwise disposed of, without the Engineer's writ- ten sanction, and if so disposed of, the Engineer shall ascertain as nearly as he can conven- iently the quantities and value, and deduct the same from the contractor's estimate. All sur- plus material shall be neatly deposited and evenly spread where and as directed by the Engi- neer, within an average distance of one mile. The whole expense of unloading and spreading to be borne by the contractor. Old lumber, stone flagging, or other materials of value to or required by the City, are to be neatly piled in the nearest Corporation Yard, or such other place as may he directed by the Engineer, within a distance of one mile. The above mentionedlo surplus must be conveyed and deposited as soon as excavated to such places as the Engineer may direct, and the contractor will not be allowed to pile any of the excavated material upon the sides of the street, except by the Engineer's written permission. If ordered by the Engineer, such material must be hauled: by the contractor to a greater distance than one mile, but an extra allowance of half a cent a cubic yard will be made to the contractor for every one hundred feet in excess of one mile that such material is so hauled. 4 0 Surerial K-6. All surplus material not required bY the City must be disposed of by the contractor not by Cityuired off the line of works, but in such a manner as not to cause a nuisance, injury or inconvenience to the City or to public or private parties otherwise the contractor will, in all cases be held liable for, and must indemnity the City against ell claims in respect thereof. Cutting below sub -grade. K-7. Should the contractor excavate 14ow the proper level of sub -grade, then this defi- ciency shall be made up .with suitable material, of which the Engineer shall be sole judge, with- out any extra remuneration to the contractor therefor, and any undrained hollows caused thereby shall be drained to the satisfaction of the Engineer, and without extra remuneration. road-bed.on or K-8• The sub -grade, when completed, iuust conform truly to the required cross-section, and be regularly sloped to the tile drains. Filling slopes. K-9. Where there is a deficiency of me l erial on the ground to make embankments or fill- ings, the contractor will be required to sul)ply the necessary material at his own expense, and a proper filling and protection must be plat ed at sides to prevent the frost getting under the edges of the sidewalk, Net cut or net fill icily will be paid for as an extra at schedule rates, when in the opinion of the Engineer the contractor is entitled to such extra. Cuts. Changes of grade. Existing sidewalks. K-10. In cutting, the contractor will required to excavate for a. sufficient distance to give a slope of 1% horizontal to 1 v al from a point one foot from the sidewalk. K-11. Where authorized changes o ride, depth, alignment, or cross-section are made either in cutting or in embankment or else`\ liere, the only allowance or deduction made to the contractor will be for the actual amount of material within the changed lines or limits, and at the regular schedule rates. In the absence of such schedule rates the contractor must arrange before doing the work what sum is to be paid or deducted therefor. K-12. Flagging and other classes of sidewalk already laid down by private parties oppo- site their own property are not to be remoi od, unless so ordered by the Engineer. The con- tractor for the works will be notified as to these portions before the commencement of the work, or when the work is in progress, and miist not in any case interfere with such flagging or walks without a written order from the Engineer. The existing sidewalk, excepting those por- tions which are to remain, is to be taken iip, and the material disposed of as provided in clauses 5 and 6. -01 Damages to K-13. The contractor, when removing areas, window openings, stop- must not in any way damage the wind(, cock boxes, ate. hydrants, or water works stop cock boxes, that may be in, or under the present wall description falling into the stop -cock boxe interfere with their proper working. W `\ walks or driveways, they must be repaire gineer. old sidewalk, and in excavating for foundation, openings, areas, coal chutes, traps, lamp posts, vn pipes or other openings, works or appliances nd care must be taken to prevent material of any ,r in any way injuring or affecting them so as to ever it is found necessary to cut or alter private x replaced in a manner satisfactory to the En- Manner removing K-14. The contractor will remove the resent sidewalk in small'seetions only, sufficient to removing p existing walk• carry on the day's work, and so as to inierfere with the business of the street as little as pos- sible. At the close of each day's work the walk is to be left in such a state as to insure per- fect safety to the public. The contract or will be held responsible and must indemnify the City for all damage caused by him to water stop -cock boxes at any time during the construction of the walk; and for any other damage causied by any neglect on his part of this or any other condition of this contract. Lamps are 4,o be provided wherever necessary, and in instances it may be advisable to enclose portions of ilie walks by barricades; these are to be provided by and at the expense of the contractor fr,on time to time as circumstances may require. Damage to K-15. The contractor will be re aired to make good, as directed, all damage done to the boulevards q and pave- ments. roadway or pavements while the work is in progress. And the contractor will be required to remove all rubbish and material from the boulevards adjoining the pavement and .restore the same to as good and clean condition as they were before commencing the work. If any of the sod`- is destroyed by the contractor or his employees he will be required to replace it with new sod to the approval of the Engineer, and if this is not done wtihin four' days after the completion of the contract, the City Engineer will, without giving any notice to the contractor, proceed to do the necessary work, charging the cost to him. Lines, levels. K-16. The curbing shall be set acci i rately and true to the lines and levels, and the con- tractor will be held responsible for an}- �•hanges that may occur in the alignment or level of the curbing after it has been put in place until the final acceptance of the work by the Engineer. Re -setting. K-17. Under "re -setting" the coif ractor must provide all labor, materials, tools, etc., required to point, line and re -set existing curbing for the amount allowed therefor in the schedule attached hereto. When this Nwirk is performed as an extra it will be measured as specified in clause K-21. Re -dressing afd re -setting must be done in precisely the same man- ner as dressing and setting, and as specified in clauses K-17 and K-18. of extra Measuremenu K-18. Extra curbing will be paid for per lineal foot, measured along the outer edge, on curbing. curves as well as on straight lines, and the price will include all excavation, gravel, concrete, pointing, dressing, setting and lining up . or any other material or labor necessary to put in place and complete. Cir s. ular K-19. Return curbs will be set at t tersections of streets, lanes and alleys, and (when ordered by the Engineer) at entrance to ivate ways, and to such, lines and levels as shall be given by the Engineer. The curbing to carried round on a curve at the corners, as directed, and to be of the same description as the b hereinafter specified and to be laid in the same manner. The curves shall have such ra '4s the Engineer may designate. Headers. K-20. Wooden headers, 2 inches thi'and 8 inches deep, are to be constructed at all lanes or driveways. I r.. P 0 Concrete curb straight. Foundation. Template. K-21. Concrete curb is to be made of Portland cement concrete. It must be constructed by skilled workmen only, and under the Engineer's directions. The curb will be 6 inches in thickness and 18 inches in depth; the body or lower part of the work will be of concrete, composed of one part of cement to three parts of clean, sharp, coarse sand, and seven parts of approved furnace slag, broken stone or screened gravel, and for the outer layer or exposed surface (which must be at least 11/2 inches thick) one part of cement to one part of clean, sharp, coarse sand, and three parts of approved crushed granite or trap. The rubbing or ex- posed surface shall be carried over the full thickness of the curbing on the top edge, and on the rubbing side shall be carried down for a depth of at least 8 inches. (See cross-section). All dust must be screened out of the crushed granite, and no particle shall be over 5/8 inch in length -or breadth. Only the very highest grade of Portland cement shall be used in the surface layer, of which the Engineer shall be the sole judge. Proper provision must be made for ex- pansion and contraction, and any damage arising therefrom, or from any other cause at any time until the termination of the period of guarantee, must be made good by the contractor, as and when the Engineer directs. The curb will be set on a foundation of gravel or broken stone, with a 3 inch tile drain below, as shown on the drawing, have a batter of 3/4 of an inch in 12 inches, and show a face of 6 inches above the pavement. of water (of which the Engineer or Inspector shall be the judge), will be rejected, and must be removed from the platform and evenly spread on top of the finished concrete, where and as directed, or if, in the judgment of the Inspector, it may be used in the concrete, it shall be his duty to see that at least two or more of broken stone, gravel or furnace slag are omitted from the batch.jeasures . r Divisions. K-25.. Every six feet a strip of iron or wood 1/4 inches thick and 8 inches wide shall be placed vertically on edge across the walk upon the cinder bed, and shall remain in place until the wearing surface is laid. These strips shall then be removed and the joints filled with sand to the top of the foundation course. The joints are then tooled and finished in a workmanlike manner. Every 18 feet an expansion joint 1/2 inch in width shall be made through the surface and foundation, as described above, and after the removal of the strip the edges shall be pro- perly tooled and finished and the open ,joint thoroughly filled with approved paving pitch. Except where the walk and curb are combined, a clear space of not less than 1/2 inch must be left between the back of the curbing and the abutting ends of the sidewalks for the full depth of the walk. This space is then to be filled with pitch as described above. H-vY SaWase' On top of the concrete base, thus prepared, and before it h had time to set, the K-22. After the street has been graded as above described, a foundation will be laid, com- posed of coarse gravel or suitable soft coal cinders, to a depth of 4 inches, after being thor- wearing surface of the walk shag — laid. The surfad�shall be 11/2 ches thick, and com- oughly consolidated by pounding or rolling with a suitable and approved roller, weighing at posed of one rt of Portland cement, o art of clean, sharp, coarse san and three parts least one ton, and the whole brought to an even surface. Whilst pounding, a small quantity of of crushed gran trap or quartzite. Tty ce t must be of the highest qua y of Portland water may be used through a sprinkler at. the direction of the Engineer. suitable for such pur se, and approved the City Engineer. K-23. When required by the Engineer or Inspector, the contractor will be required to fur- nish wooden templates, cut to the exact form and slope of the walk, for use by the Inspectors. Concrete base. K-24. Upon the foundation a layer of concrete, 3% inches thick, shall be laid, composed of one part of Portland cement (of approved quality), three parts of clean, sharp, coarse sand, and seven parts of approved furnace slag, broken stone or screened gravel, thoroughly free from stones over two inches in diameter, and free from clay, loam, dirt or other impurities. Samples of the sand, furnace slag, broken stone and gravel must be approved by the Engineer before any is brought upon the works. The mixing must be done on a tight, smooth platform. The sand shall first be evenly spread on this platform, and the proper proportion of cement (after. being measured in the box prepared for that purpose, and struck off level) shall then be spread over the sand. These ingredients shall then be thoroughly mixed with hoes or shovels (or both), as directed, then heaped up in a pile in the centre of the platform, and then spread out evenly over its surface while in a dry state. Clean water must then be applied, and the mortar thoroughly mixed wet, care being taken that the minimum quantity of water is used, so that the mortar will not be liable to flow. The broken stone, gravel or furnace slag shall then be distributed evenly over the mortar and the whole mass turned over and shoveled up into one heap in the centre of the platform. The whole heap shall then be thoroughly turned over again and uniformly mixed together with shovels, once, or more often if necessary, or so directed, before being removed from the platform. Any mixture or mortar having an excess Light surface. K-27. On the top of the concrete bash, thus prepared, and before it has had time to set.. the wearing surface of the walk shall be laid. This surface shall be one inch thick and composed of one part of Portland cement, one part of clean, sharp, coarse sand, and three parts of screened pea gravel, crushed granite, trap, quartzite or suitable hard limestone. See K-32. The cement used must be of the highest quality of Portland suitable for such purpose, and approved by the City Engineer. Granite. K-28. The granite, trap or quartzite is to be crushed to irregular fragments, none of which exceed 5/8 inch at largest dimension, and absolutely free from dirt of all kinds, and the dust must be all screened out. Mixing and K-29. The granite, trap, quartzite o pea -ravel, sand and cement are to be thoroughly working. mixed while dry, sufficient water beitig added to produce a concrete or required consistency. The concrete so mixed shall then be placed on the concrete base and worked with floats so as to give a smooth surface of mortar. The surface shall then be trowelled and brought to a perfectly true and even plane, inclining towards the curbing with an' inclination of 1/4 inch to the foot, or such other slope as may be determined by the Engineer. If the resulting surface is not, in the opinion of the Engineer, thoroughly filled, a dryer composed of one part of cement and one part of sand shall be lightly dusted over the surface and the finishing done as described in K-30. It -]ling and finishing. K-30. The surface shall then be finished by rolling with a roller of approved pattern, and the divisions between each block shall be marked, rounded and tooled with proper finishing tools in the neatest possible manner, and to the approval of the Engineer. Openings, etc. K-31. The contractor will be required to carefully fit, cut and mark the pavement around all openings for iron covers, and around all water works stop -cock boxes, coal chutes, lamp post pillars, hydrants or down pipes, telegraph or other poles. This work must be neatly done with square or other markings, to the satisfaction of the Engineer, as he may from time to time direct. Intersections. K-32. At the corners of intersecting streets, lanes and wagon entrances to private proper- ties, the pavement is to be made and marked to suit existing conditions as directed. At lanes and private driveways special precautions must be taken by providing a richer and thicker sur- face mixture, and by marking the pavement off in blocks of special dimensions, as directed from time to time by the Engineer. The price for all such work is to be included in the con- tract price per lineal foot. Boards. K-33. All material used in the work must be placed on clean boards, and the Inspector must reject any not so placed. Contractor's stamof p and K-34. The contractor will be required to mark with an approved stamp such places as date t on.n the Engineer may select. The stamp to have the contractor's initials and 1911. upon it. At least every tenth day (longitudinally) must be so marked. Of material. K-35. In order to secure the correct proportions of cement, gravel, sand, crushed granite Of material. or other aggregate used in the preparation of any of the concrete mixtures required under this specification, the contractor must provide a sufficient number of suitable, neatly planed and properly made boxes, to the approval of the Engineer, in which to measure the different materials composing the concrete, and all material used in the work must be measured in these boxes. These boxes must be made of exact I v similar dimensions and of such size as to con- tain exactly one measure of cement. Care nnnu d be taken whenever these boxes are used to see that they are scraped out and perfectly clean before any fresh material is placed therein. The cement, as well as other material used, must, after being placed in the box, be struck off true with a straight edge. cement tests. K-36. The cement will be tested in the City Engineer's Office from samples taken from time to time from the cement supplied, or proposed to be supplied, by the contractor, and no other test will be accepted. In every case the tests must be to the Engineers entire satisfac- tion. The contractor must always have on hand and keep in store at least i days before re- quired for use, a sufficient quantity of cement for the work he has to do, and so as to keep the men engaged neon it continuously employed for at leasit six days ahead. This cement must be kept under proper protection on or near the'ivorks one of the objects of this requirement being that tests may be made of each batch of cem nt at IeaIfll d,iys before it is used. Absolute compliance. with this clause will .be insisted on, and in the event of failure or neglect on the part of the contractor to carry out the requirement specified, work shall be `,)pped until such time as the contractor has secured cement certified by the City Engineer, as xisfactory after a seven day test. j IL K-37. The contractor shall be requ the sun, by the use of canvas, or other oughly wetted and kept so, for at least CITY ENG}INEER'S OFFICE, Toronto, March, 1910. protect the finished surface of the walks from ed methods. The finished surface shall be thor- -four hours. C. H. RUST, City Engineer. -n r f 401�ai- y CONCRETE +I h tl DEWALK Ila; aclnl ,3j Tile Dra4q - cz-oss section -- -- Scale b/6 Roadiva,y Dep I. Ci ty.En !freers Offi e e Tbro n to . /3 �)-'.fr�ori 11910. C�1 r4) a City Engine er