1925 (#1403-1607) - Laserfiche WebLink

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CITY OF SANTA ANA, CALIFORNIA STANDARD SPECIFICATION NUMBER 100. Portland Cement Concrete Pavement. (One Course) Upon a subgrade prepared as hereinbefore specified, and thoroughly dampened by means of a spray nozzle, shall be laid a Portland Cement Pavement of such width, thickness and cross sections as shown on the plans. (a) FORMS OR HEADERS. ~/here the pavement does not terminate against smother pavement, and along the edges when it does not terminate against a concrete curb or gutter, and before the final trimming of the subgrade, the Contractor shall set side forms or headers on a firm foundation true to line and grade. All timber side forms or headers shall be at least two (2) inebes thick and equal in width to the full thickness of the pavement, and shall be of good sound timber free from wasp, knots, or other imperfections. Their upper edges shall conform to the finished grade · nd cross-section of the pavement. All joints simll be scabbed with one inch lumber equal in width to the width of the ~ ~ ~t least'eighteen (18) inches long. ~ ~ ~,,,,$ or headers shall be held to the established line and grade by stakes ~ I~a~ ~ stakes shall be at least two (2) inches by three ($) inches and twenty (20) tm~es long, or longer if necessary, to properly support the headers. Stakes shall be placed ~nmediately adjacent to either side of the joint and at intervals of not more than thirty (~0) inches therefrom. Placing of concrete will not be permitted until the forms are absolutely firm and rigid ~d capable of resisting all tendency to spring out of line, or settle during the prOgress of the W°rk. If metal forms are used they must be of approved design and equal in width to the thickness of the pavement and shall be free from warp or other defects. (b) Where pavement edges are adjacent to curbs, temporary forms or headers shall be used as a guide to the final subgrade trimming and the laying of the pavement. All such temporary headers shall be set not more than two (2) feet from the curb and shall be of good sound timber free from warp, at least two (2) inches thick and equal in width to the thickness of the pavement. The top of the headers shall conform strictly to the grade of the pavement and shall be well staked with stakes of sufficient size and length and at such intervals as will insure rigidity under the templet in tamping of the concrete. Alt stakes and temporary headers are to be removed and the space filled with concrete prior to any finishing operation. ~TION 2. CONCRZT~ PROPORTIONS. The concrete shall be mixed in the proportion of one (1) bag of Portland Cement, to not more than two (2) cubic feet of fine aggregate to not more than four (4) cubic feet of co.se a~r~'ate, and in no case shall the volume o~ the fine ag~reg&te be less than one-h af (~) the volume of the coacse aggregate, Thi ~.ne ~ sl~ll co~siet of c~qerete san~ as hereinbefore spocified.