700-211Section 722 — Precast Concrete Box Culverts
722.1Description
1 Provide and install precast concrete box culverts.
722.2Materials
722.2.1 Precast Concrete Sections 1 Ensure that precast concrete box culvert sections conform to either AASHTO M 259 for depths of cover 2 ft and greater or AASHTO M 273 for depths of cover less than 2 ft, with the exception of modifications as stated herein. Ensure that the precast concrete box culverts conform to the manufacturing procedures, tolerance, and designs specified in ASTM C1577. 2 Manufacture the sections according to the applicable AASHTO or ASTM designation based on the size (span (W) and rise (H) dimensions), loading (minimum earth dead load and interstate live load to be used in all applications unless otherwise indicated), and earth cover as specified on the Plans and in the Special Provisions . Box sections that exceed the minimum specified requirements may be substituted for the Plan designated box sections at no additional cost to the Department and with prior written approval of the OMR . Ensure that box culvert is obtained from a source listed on Qualified Products List 14. 722.2.2 Site Cast Concrete 1 Except for the aggregate gradation, provide concrete for the precast sections comply with Sections 701 and 714. Ensure that concrete for components cast at the site (wingwalls, headwalls, aprons, cut -off walls, etc.) comply with 722.2.3 Reinforcing Steel 1 Provide reinforcing steel conforming to AASHTO M 259 or Section 703, as applicable. 722.2.4 Joint Material 1 Use a joint seal material that is a preformed flexible joint sealant conforming to ASTM C990. 722.2.5 Liquid Curing Compounds 1 Use liquid curing compounds conforming to Subsection 702.2.3.