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' A. General : <br /> L Re-use of forms shall be subject to advance written approval of the <br /> Structural Engineer. <br /> ' Be Requirements : <br /> 1 . Except as specifically approved in advance by the Structural Engineer, re- <br /> ' use of forms shall in no way delay or change the schedule of placement of <br /> concrete from the schedule obtainable if all form were new. <br /> ' 2 . Except as specifically approved in advance by the Structural Engineer, re- <br /> use of forms shall in no way impart less structural stability to the forms no <br /> less acceptable appearance to finished exposed concrete . <br /> 3 . 04 REMOVAL OF FORMS <br /> A. General : <br /> 1 . Minimum periods to form removal after concrete placement shall be as <br /> follows : <br /> Slabs and curbs 24 hours <br /> Vertical walls (4 ' -0 " Ht. ) 36 hours <br /> Vertical walls (over 4'-0 " Ht. ) 7 days <br /> 2 . Removal of formwork may be extended if deemed necessary by the <br /> Structural Engineer, <br /> Be Removal . <br /> 1 . Remove metal spreader ties on exposed concrete by removing or snapping <br /> ' off inside the wall surface and point up and rubbing the resulting pockets to <br /> match the surrounding areas . <br /> ' 2 . Flush all holes resulting from the use of spreader rods and sleeve nuts , using <br /> water, and then solidly pack throughout the wall thickness with cement <br /> grout applied under pressure by means of a grouting gun; grout shall be one <br /> ( 1 ) part Portland cement and two and one-half (2 - 1 /2) parts sand ; apply <br /> grout immediately after removing forms . <br /> ' * * *END OF SECTION * * * <br /> 03100 -3 <br />