2017-06-26-minutes-public-works-study-session

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Adequate quantity of precast concrete sills, altachment hardware, and anchor plates shall be provided to produce foundations for both independent spans - 13.0 BACK WALLS The manufacturer shall supply two sets. The back -wall system shall be comprised of two pieces of sheet piling extending 3'-4" in total height. The sheet piling shall be of 10 gauge material. The length of the top piece of sheet pile shall be equal to the bridge width plus 5 feet. The length of the bottom piece of sheet pile shall be equal to the bridge width plus 10 feet. Back walls shall be designed to support the backfill and applied traffic loads. The finish of the sheet pile shall be as follows., Galvanized. Adequate quantity of sheet pile shall be provided to produce back walls for both independent spans. 14.0 FABRICATION 14.1 Welding Welding procedures and weld qualification teal procedures shall conform to the provisions of AWS D1.5, Bridge Welding Code, latest edition. Filler metal shall be in accordance with the applicable AWS Filler Metal Specification, and shall match the corrosion properties of the base metal. 14.2 Welders Welders shall be qualified for each process and position used while fabricating the bridge. Qualification tests shall be in accordance with AWS DIA. All weld qualifications and records shall be kept In accordance with the Fabricator's Quality Assurance Manual which has been approved by AISC. 14.3 Bolted Splices For shipping purposes, the bridge may be fabricated in sections. Sections shall be field assembled using bolted connections and or field welding as indicated on the drawings. Tightening of all structural bolts shall be by Turn -of -the -Nut Method. 15.0 QUALITY CONTROL 15.1 AISC Certification The bridge shall be fabricated In a shop owned by the Bridge Manufacturer. This tacili ty shall have up to date certification by AISC as a Certified Bridge Fabrication - Intermediate (Major) with Fracture Critical Endorsement. 15.2 Certified Weld Inspector When welding is required, the bridge manufacturer shall employ a Certified Weld Inspector (CW I), with endorsement by AWS QC1. This CWl shall be present during the complete fabrication of the bridge. The CWI shall provide written documentation that the bridge has been fabricated in accordance with these specifications and the approved design drawings.