05/19/1915 Board of Public Works Special Meeting Minutes

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664 Board :net in special session at 11:00 A.M. all members present. Mr. Eli Seebirt, City AtVorney^also present. The Board took up for consideration the letting; of the contract for the construction of the M ehigan Street Trunk sewer and said Board found that one J.H. Cahill vias the lowest and best birder, therefore ordered that said contract be let to said J.H. Cahill. It was further ordered that the specification filed by MN J.H. Cahill with is hid being the specifications of the Merriweather Lock Joint Pipe Company which shows one and two ring reinforced concrete pipe and agreeable to the specifications on which bids were received, the Board now finally adopts the two ring reinforced concrete pipe as per specifications which were 'filed with the City Engineer May 14th.11915 and the same are hereby ordered to be made as a part of th--- specifiea,�-. tions for the construction of said sewer, which specifications are as follows -t a SPECIFICATIONS 141OR REINFORCED CONCRETE PIPE. FORMS. The fo—ms shall consist of cast iron bottom and top rings shaped to form the bell spigot ends of the pipe, and sheet steel inner and outer casings, lihich shall be rolled to true cylinders. The inner and outer casings shall be truly concentric °iyhen the forms are assembled. The forms shall be rigidly held together and -shall have no cracks extending through either the inner or outer casings, which will allow the water from the concrete to run through. Butt straps must cover the joints between the adja- cent sheets of the casings. COVtCPFsTF,. The concrete used in the manufacture of the pipes shall consist of one part of Portland Cement of quality speeified,� two parts of clean sharp sand and tour parts of broken stone or clean gravel which will pass through a one inch ring. CEMENT. The cement used shall be a well known brand Portland Cement, with an esta- blished reputation and tested to meet the requirements'of the American Society of Civil Engineers' or�Canaddan Society of Civil Engineers' specifications, as the engineer may direct. All cement used in the work shall be protected from the weather to the satisfaction of the engineer. REINFORCEe TENT. The reinforcement shall consist of American Steel and 'Mire Co.'s Triangular Mesh or other wire mesL of the styles and weights spe-cified or shown on the drawings. The reinforcing mesh shall extend into the bell of the pipe and out of the spiF'ot portion of the pipe as shown on the drawings. When two adjacent sections of pipe are placed together, the fabric extending out of the spigot shall overlap the fabric ex- tending into the bell in an internal recess, as shown o the drawings. - MOULDING PIPE AND MIXING CONCRj,TE. All concrete sL&ll be mixed in a suitable batch mixer in a manner satis- factory to the engineer. Means for measuring the several kinds of ingredients shall be provided so that the concrete shall be an accurate 1-2-4 mix as specified under CONCRETE A. The concrete shall be placed in the -forms in small, quantities and the moulding of any one piece shall be eontinous from the placing of the first concrete in the fo:-ris until the pipe section is corpleted. No retempered concrete will be used under' any circumstances. Sifficient water shall be used in the concrete to make a wet mix and the concrete shall be thoroughly sliced or spaded as,it is being placed in the forms. After the removal of the forms, the pipe shall be kept moist by frequent sprinkling for several days. PIPE. The pipe shall be made of concrete and reinforced as specified. The pipe shall be manufactured by an established manufactueer of reinforced concrete pipe, who shall have had previous experience in the manufacture of reinforced con- crete pipe. The pipe shall be of the full bell and spigot type and. no pipe having butt joints will be considered. The reinforcement shall be placed, n.nd of the weights as specified or as shown on the d.rawincz. All pipes shall conform to the dimensions and contain amount of reinforcement shown o-,. drawing and in table. All pipes shall be marked with the date of their manufacture Lnd no pipe shall be laid that it not fourteen (14) days old.