O-1950-398 - Laserfiche WebLink

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e e .' of one (1) foot on each siele of the sidewalk. 6. ~: After the sub-base has been brought to grade and thoroughly compacted, and after the forms have been set, a base course consisting of two (2) inches of bank run sand shall be evenly spre~d and compacted. 7. Form,s: Forms shall 1:e metal or loTood and shall be straight, free from warp, and shall be set plumb ann held se- curely in place. If of wood, forms shall be composed of two (2) inch material. a.Expansion Joints: An approved type of commercial ~ pre-molded expansion joint one-half (1/2) inch thick shall be placed where t~o lines of sidewalks intersect, where meeting existing walk, and at intervals of not more than thirty-six ()6) feet throughout the entire length of the sidewalk. At all places where sidewalks meet curbs, a one inch approved type of commercial pre-molded ex- pansion joint shall be provided. All expansion joint material shall extend entirely through the sidewalk and shall extend the en- tire width of the sidewalk. 9. Finish: The sidewalk shall be brought to sub- st~ntially the finished elevation and screened off level. Then a 41 topping of one (1) part Portland cement to one (1) part dry fine screened sand shall be applied dry to the sidewalk by the dusting method and floc,ted in with '{-Tood darbies or floats. A second dust coat shall then be applied to fill in all ION spots and take up all excess water and shall again be flo&ted by means of hand floats to a true even surf~ce, and finally steel-trowellecL at the proper time and a sufficient number of times to produce a smooth, hard, burnished surface, free from waves and other defects. - As soon as the surfaces have hardened suffi- ciently, they shall be brushed with e stiff broom to produce a non-slip finish. Sidewalks shall be blocked into squares Nith neat steel jointer; also, round off all edges at expansion joints and at edges, etc., with metal edging tools.