Agenda - Council - 04/25/2023 - Laserfiche WebLink

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City of Ramsey — Ramsey Water Treatment Plant AET Proposal No. P-0021454 April 10, 2023 Page 5 of 8 ENGINEERING rEsTiNG strength after 7 days and two will be tested after 28 days. The fourth specimen will be held for future testing, if required. Welded and Bolted Connection Observations During erection of the structural steel frame, steel joists, and metal decking, AET will provide an Engineering Technician II (AWS/ICC Certified Welding Inspector) certified in accordance with ASNT to perform observations of the welded and bolted connections. These services will be performed on an on -call basis when requested by the contractor. Our services will include the following: • Observe bolted connections for compliance with Section 9a of the "Specification for Structural Joints using ASTM: A325 or ASTM: A490 Bolts" approved by the Research Council on Structural Connections. • Observe welded connections for compliance with the requirements of Section 6 (steel frame) of the AWS "Structural Welding Code" D1.1. Fillet welds will be visually observed for length, quality and suitability. Full or partial penetration welds will be tested by ultrasonic or magnetic particle methods. • Observe deck welds for compliance with the requirements of the AWS "Structural Welding Code" D1.3. • Observe deck fasteners to verify that the correct number and spacing is provided in accordance with the project specifications. • Observe and test the shear studs welds for suitability and quality in accordance with the requirements of AWS "Structural Welding Code" D1.1 — Section 7. Any deficiencies or deviations which are observed will be reported to personnel from the contractor and/or their subcontractor. We estimate 5 trips will be required to complete our observations of the welded and bolted connections on this project. Daily field reports of our observations and testing will be available to the contractor and other authorized site personnel. Bituminous Subgrade Test -Roll Observations and Testing During or after final grading of the pavement subgrade soils, AET personnel will observe test -rolling of the pavement subgrade soils. These observations will be performed by a Staff Engineer I on an on -call basis. Our scope of services will include the following: • Observe the reaction/stability of the pavement subgrade soils as they are test -rolled by a loaded, tandem -axle dump truck. • Evaluate the subgrade deflections under the wheel loads, and mark areas of excessive deflection. Areas of excessive deflection will be shown to personnel from the contractor and/or their subcontractors. • Provide recommendations for correction of the unstable subgrade soils.