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PGSF WMVD Storm and Combined Sewer - Construction Package 2 Concrete Forming <br />Project No. 180162 03 11 00 - 3 <br /> <br />2.03 FORM RELEASE COMPOUND <br />A. Coat form surfaces in contact with concrete using a non-staining, non-residual, water <br />based, bond-breaking form coating. [Use NSF approved form release agents in potable <br />water containment structures.] <br />PART 3 EXECUTION <br />3.01 PREPARATION <br />A. Cover surface of forms with form release compound prior to form installation in <br />accordance with manufacturer’s recommendations. <br />B. Do not permit excess form coating material to stand in puddles on forms or hardened <br />concrete surfaces against which fresh concrete is to be placed. <br />C. Clean surfaces of forms, reinforcing steel and other embedded items of accumulated <br />mortar, grout, or other foreign materials from previous concreting or construction <br />activities before concrete is placed. <br />3.02 FORMWORK CONSTRUCTION <br />A. Form vertical surfaces of cast-in-place concrete including sides of footings. <br />B. Construct and place forms so that the resulting concrete will be of the shape, lines, <br />dimensions, and appearance indicated on the Drawings. Brace or tie forms together to <br />maintain position and shape under the load of freshly-placed concrete. <br />C. Tighten forms to prevent leakage. <br />D. Provide temporary openings(windows) at base of column and wall forms and at other <br />points where necessary to facilitate cleaning and observation immediately before <br />concrete is placed. <br />E. Provide temporary openings to limit height of free fall of concrete and to limit the lateral <br />movement of concrete during placement. Openings are required in wall placements <br />greater than 20 feet in height, spaced no more than 8 feet on center measured <br />horizontally and vertically. <br />F. Place a 3/4-inch chamfer strip at exposed to view corners of formed surfaces. <br />G. At construction joints, overlap hardened concrete surface by at least 1 inch. Brace forms <br />against hardened concrete to prevent movement, offsets, or loss of mortar at <br />construction joint and to maintain a true surface. Where possible, locate juncture of built- <br />in-place forms at architectural lines, control joints, or at other inconspicuous lines. <br />H. Where circular sections are formed using flat faced materials, use flat form lengths not <br />exceeding 2 feet wide and the resulting deflection angles at the joints is not greater than <br />3-1/2 degrees. <br />I. Construct wood forms for openings to facilitate loosening. Anchor forms so that <br />movement of any part of the formwork system is prevented during concrete placement.