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3. Floor slabs keyed joints maximum spacing 20' plus or minus each direction <br />unless otherwise noted. <br />A. Expansion Joints: <br />1. Locate as shown on drawings. <br />2. Joints in walkways maximum at 20' o.c., snap lines and saw -cut 1/8" wide <br />by 1" deep between expansion joints in equal bays at not over 5' o.c., <br />within 24 hours of concrete placement or until concrete is trafficable with <br />power saw. <br />3. Joints shall be straight and smooth. They shall have hardened before fresh <br />concrete is deposited against them. <br />4. Do not place expansion joints where slabs are up against the exterior of <br />masonry walls, unless otherwise detailed on plans. Do not place any <br />expansion material on the inside face of masonry walls where slabs are <br />poured against same walls. <br />5. After concreting has been started, it should be carried on as a continuous <br />operation until placing of a panel or section, as determined by its <br />boundaries or joints, is completed. <br />3.04 CURING <br />A. Begin curing of concrete as soon as practicable after placing, but not more than 3 <br />hours thereafter. Provide a total wet cure time of 7 days minimum at 50 degrees F <br />minimum temperature. <br />B. Curing of structural members shall begin immediately after removal of forms. <br />C. Apply curing compounds as specified above, clear for exposed slabs. Compound <br />used on floors that are to receive tile or other additional finish shall be compatible <br />with adhesives and finish materials. Apply first coat of curing compound as soon <br />as possible after pouring. <br />3.05 FINISHES <br />A. Formed Surfaces: <br />1. Finishes - Defined: <br />a. Rough Form Finish: Reasonable true to line and place. Tie holes <br />and defects shah be patched and fins exceeding 1/4" in height shall <br />03300-6 <br />