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HomeMy WebLinkAbout0820f ■ ORDINANCE No. g f � � AN ORDINANCE to provide for the specifications for the con- struction of concrete sidewalks upon the streets and alleys in the City of Port Angeles, and providing a penalty for the violation there- of. THE CITY COMMISSION OF THE CITY OF PORT ANGELES DO ORDAIN AS FOLLOWS: Section I. Hereafter it shall be unlawOor any person, firm, or corporation to construct, lay or build concrete sidewalks outside the limits of any private property or upon any street or al- ley in the City of Port Angeles between the property line and the street line, which the specificatigxis shall not conform with,. be equal to or better than p- aJ) e 1 L X by W..,,. e�1.y and requirements set forth ii`n Section II here f. `�..� �sss 4__ Section IE. It shall be la*ful for the City of Port An- geles by its duly appointed and constituted agents and employees to inspect all material and workmanship going into the construction of concrete sidewalks described in Section I hereof, during the course of construction thereof for the purpose of determining whether or not the specifications provided in Section II of this ordinance are being fully complied with. Section I. Any person, firm or corporation violating any of the provisions of this ordinance or laying, building or construct- ing any sidewalk mentioned in Section I hereof, of a quality of con- struction which is not in conformity with, equal to or better than the specifications provided in Section I, shall be deemed guilty of 1 • • • a misdemeanor, and upon conviction thereof shall be liable for pay- ment of a fine in a sum not exceeding one hundred dollars ($100.00). SectionfV This ordinance is declared to be urgent and necessary for the immediate preservation of the public peace, ealt and safety, and shall take effect and be in force from and afterhits passage, approval and publication. Passed first reading by the City Commission, March 23, 1927. Passed second reading by the City Commission, March 30, 1927. Passed third reading and adopted by the City Commission, 1927. Approved and signed by the Mayor this 10 day of' dl ,1927. ATTEST: C City Clerk. Approved as to form: Published ' I �1 • I MATERIAL. 1 Cement, All cement used in cement oonerete sidewalks shall be what is oommonly known as "American Portland Cement" and shall meet the renuirements of the current standard specifications of the "American Society for Testing Materials ". Fine Aggregate. Fine aggregate shall consist of natural sand or screen- ings from hard,tough crushed rook,clean and free from any surface film or coating and graded from fine to coarse,with coarse part- icles predominating. Pine aggregate ,when dry shall pass a screen having four (4) mesh 'bib the linear inch; not more than twenty five (25) per cent shall pass a screen having fifty (50) mesh to the linear inoh;and not more than five (5) per oent shall pass a screen having one hundred meat to the linear inch. Fine aggregate shall not contain injurious vegetable or organic matter,nor more than five (5) per cent by volume of clay or loam. • Field tests may be made by the City Lngineer at any time • • during the progress of the work. If there is more than five (5) per cent of clay or loam by volume,o p injurious vegetable matter, the material represented by the sample shall be rejected. COARSE AGGREGATE. Coarse aggregate shall consist of clean,durable crushed rook or ebbles �(o f inc p ,graded in size from coarseA,free from vegetable or other organic matter and shall contain no soft,flat or elon- gated particles. The size of the coarse aggregate shall range in size from one and one half(lil inches down to fine,but not more than five (5) per cent shall pass a screen having four (4) mesh to the linear inch. v.', IL?I OSa;. ..a .i 2JTIc� (2) SUB-GRADE, The sub -grade shall be excavated to a depth of four (4) inches below the finished grade,all soft and spongy places shall be removed and filled with suitable material. The sub -grade shall be thonoughly settled and compressed by wetting and tamping before the concrete is placed thereon. All material excavated or removed from the work and not used on the improvement shall be disposed of in a manner satisfaotory to the City ingineer,provided that the City Engineer shall not require the property owner or contractor to haul the excavated material a distance greater than two thousand (2000) feet. FORMS The contractor or owner shall furnish suitable lumber for forms,of such shape and dimentiens as may be required. The City Engineer will require forms and templates to be strongly built and braced so that they will not go out of line or change grade when the concrete is deposited in or against them. LINES AND GRADES. Cement concrete sidewalks shall be oonstructed between, and parallel to the property line and the line of the curb. The • location and grade stakes will be set by the City Engineer. WATER The water used in mixing concrete shall be free appreciable amounts of oil,acid,alkali or organic matter. quabtity of water from the to be used,in mixing concrete,shall not exceed 7.75 gallons per sack of cement,for 1 -3 -5 concrete. PROPORTIONS. Cement concrete sidewalks in the City of Port Angeles • shall consist of two (2) courses; 1st, a concrete base three and one half (3i) inches thick The wearing course shall be depth and shall be composed mixture. ,composed of a 1 -3 -5 concrete mixture. one half (2) inch thick or over in of a 1-2* Portland cement and sand Not less than one (1) barrel of cement shall be used for each fifty (50) square feet of finished four (4) inch side- walk. V (3) CONCRETE BASE The concrete shall be mixed in the proportions,by volume of one (1) sack of portland oement,three (3) cubic feet eof fine aggregate and five (5) cubic feet of coarse aggregate. The concrete shall be mixed by maohine except when the City Engineer shall permit under special conditions. A batch mixer of approved type shall be used. The ingredients of the concrete mortar shall be mixed to the specified consistency andthe mixing shall continue for at least one minute after all the materials are in the drum. The materials shall be mixed wet enough to produce a concrete of a consistency that will flush readily under tamping but which can be handled without causing a separation of the coar- se aggregate from the mortar. But Ihall not exceed the maximum amount of water specified per sack of cement. After mixing the concrete shall be handled rapidly and the successive batches deposited in a continuous operation comp- leting individual sections to the required delkpth and width. Under no othrcumstances shall concrete that has partly hardenedbe used. Forms shall be filled and the concrete str3k off and tamped to a surface the thickness of the wearing course below the established grade of the walk. If dirt, dust or sand s collects on the base it shall be removed before the wearing course is applied. Workman shall not be permitted to walk in the freshly laid concrete.Any concrete in excess of that needed to complete a section at the stopping of work shall not 'housed. In no case shall concrete be deposited upon a frozen subgrade or subbase. •When it is necessary to mix by hand the material shall be mixed on a watertight platform until the mixture is -a` uniform color,the required amount of water added, and the mix- ing continued until the mass is of a uniform consistency of character throughout. WEARING COURSE. The wearing course shall be mixed in the proportion t V. (4) . s . HEARING COURSE. Con't. of one (1) saok of Portland Cement and two and one -half (2) Cubic Peet of fine aggregate. The mortar shall be of the driest consistency possible to work with sawing motion of the strikeboard. The wearing oourse shall be placed immediately after mixing. It shall be deposited on the fresh concrete of the base before the latter has appreciably hardened, and brought to the established grade with a strikeboard. After the wearing course has been brought to the established grade by means of a strikeboard,it shall be worked with a wooden float in a manner which will thoroughly compact it and provide a surface free from depressions or irregularities of any kind. The surface shall have a "scratch trowel" finish. The troweling effect shall ht all times be perpendicular to the line of walk to expidite the movement of storm water of of the walk. The type of trowel chosen for the work shall be approved by the City Engineer. In no case shall dry cement or a mixture of dry cement and sand be sprinkled on the surface to absorb moisture or to • hasten the hardening, All mortar or concrete which, in the opinion of the City Engineer,fail to how proper bond,or that fails to set after a sufficient length of time,shall be taken up and replaced by the Contractor or Owner ,at his own expense,with new mortar ior concrete of proper quality. "V" GROOVES. The pattern on the finished walk shall consist of • uniform squares,except when triangular or irregular figures occur of neoessity,such squares shall occupy the whole or any part of the width of the walk as directed by the Engineer. The above mentioned pattern on the finished walk shall be made with a Cement edging tool that will turn a quarter inch radius and cut one quarter inch deep, The marking shall be done in a workmanlike manner, e • • • (5) ti d' "V" GROOVES. Con't. J y S the traverse grooves shall be made at right angles to the walk. On grades steeper than four per cent,the surface shall be roughtened finishing with a coarse brush,or in such a manner as the City Engineer may direot. EXPAf SIO1 JOINTS. At all places in street intersections when concrete sidewalks join the curb,at all street margins produced,there shall be an expansion joint. On straight lengths of walks,joints shall be placed not over twenty -five feet apart.Joints shall not be less than one -half inch thick and shall be perpendicular to the line of the walk or parallel thereto. All joints shall be perpendicular and extend entirely thru the sidewalk. The filler for the joints shall be either Asphaltic Filler,or prepared strips of Fiber matrix,and bitumen of manu- facture approved by the City Engineer.