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i <br /> Ile <br /> 11 el, <br /> d <br /> SUBARTICLE 400 -21 . 2 (page 407 ) is deleted and the following substituted : <br /> 400-21 .2 Investigation, Documentation and Monitoring : The Engineer will inspect _ <br /> concrete surfaces as soon as surfaces are fully visible after casting , with the exception of surfaces <br /> of precast concrete products produced in offsite plants , between 7 and 31 days after the <br /> component has been burdened with full dead load, and a minimum of 7 days after the bridge has <br /> been opened to full unrestricted traffic . The Engineer will measure the width, length and depth of <br /> each crack and establish the precise location of the crack termination points relative to permanent <br /> reference points on the member. The Engineer will determine if coring of the concrete is <br /> necessary when an accurate measurement of crack depth cannot be determined by use of a <br /> mechanical probe . The Engineer will monitor and document the growth of individual cracks at <br /> an inspection interval determined by the Engineer to determine if cracks are active or dormant <br /> k <br /> after initial inspection. The Engineer will perform all final bridge deck crack measurements once <br /> the deck is free of all debris and before transverse grooves are cut and after planing is complete <br /> for decks that require planing. <br /> Provide the access , equipment and personnel needed for the Engineer to safely <br /> perform this work at no expense to the Department . Core cracks for use by the Engineer <br /> in <br /> locations and to depths specified by the Engineer at no expense to the Department. <br /> t <br /> SUBARTICLE 400-21 . 3 (page 407) is deleted and the following substituted: <br /> 400-21 .3 Classification of Cracks : The Engineer will classify cracks as either <br /> nonstructural or structural and determine the cause . In general, nonstructural cracks are cracks <br /> 1 /2 inch or less deep from the surface of the concrete ; however, the Engineer may determine that <br /> a crack greater than 1 /2 inch deep is nonstructural . In general, structural cracks are cracks that <br /> extend deeper than 1 /2 inch . A crack that is fully or partially underwater at any time during its <br /> service life will be classified as a structural crack unless the Environment note on the General <br /> Notes sheet in the plans categorizes the substructure as slightly aggressive , in which case, the <br /> nonstructural crack criteria may apply as determined by the Engineer. <br /> Review and comment on the Engineer ' s crack classification; however, the <br /> Engineer will make the final determination . <br /> 410 PRECAST CONCRETE BOX CULVERT . <br /> (REV 6-840) (FA 71w2940) (141 ) <br /> SUBARTICLE 410 -3 . 1 (Page 416) is deleted and the following substituted : <br /> 410-3 . 1 General : Meet the requirements of Section 346 , except as modified herein : <br /> Prepare , cure , and test the test cylinders in accordance with ASTM C -31 and <br /> ASTM C -39 test methods . Follow the alternative method of compaction, in accordance with <br /> ASTM C497 , if the consistency of concrete is too stiff for compaction by rodding or internal <br /> vibrations . Expose shipping strength test cylinders to the same curing conditions as the precast <br /> concrete box sections . Cure the 28 -day strength test cylinders in accordance with Section 346 . <br /> Ile - 139 - <br /> LL <br /> FPID ( S ) : 423186 - 1 - 58 - 01 <br />