Minnesota 2020 Standard Specifications 563 Ensure pot bearings are produced by a firm specializing in the design and manufacture of pot bearings, with a minimum of 8 years of successful bearing installations. Design, f abricate , and test in accordance with the requirements of AASHTO LRFD Bridge Design Specifications , Article 14.7.4 Pot Bearings and the AASHTO LRFD Bridge Construction Specifications , Article 18.3, Pot and Disc Bearings. Ensure brass sealing rings are rect angular cross -section conforming to AASHTO LRFD Bridge Design Specifications , Article 14.7.4.5.2 with no less than 3 rings per bearing assembly. Provide the Bridge Engineer with written notification of bearing testing at least 30 Calendar Days prior to the start of testing operations.
2474.4METHOD OF MEASUREMENT
The Department will measure High -load multi -rotational bearings by the number of acceptable units of each type provided, which consists of all components shown in the Plans or on the approved shop drawings for a single bearing assembly, whether it is a pot or disc bearing.
2474.5BASIS OF PAYMENT
The Contract Unit Price for High-load multi -rotational bearings includes the cost of providing and installing the pot or disc bearings complete in -place. The Department will pay for bearings on the basis of the following schedule: Item No. Item Unit
2474.502 High -load Multi -rotational Bearings each
2475.1DESCRIPTION
Furnish and install metal railing, including anchorages and fittings.
2475.2MATERIALS
A Low -Carbon Structural Steel ................................ ................................ ................................ . 3306 B Pipe and P ipe Sleeves B.1 Gray Iron Castings ................................ ................................ ................................ ... 3321 C Threaded Rods, Bolts, Nuts, and Washers C.1 Galvanized ................................ ................................ ............................... 3391 and 3392 C.2 Electroplate ................................ ............................. 3391 and ASTM B633, Type III, SC 4 D Part of a proprietary anchorage assembly
564 Minnesota 2020 Standard Specifications 2475.3 CONSTRUCTION REQUIREMENT A Gene ral Perform the Work in accordance with the applicable requirements of 2433 , "Structure Renovation," 2402 , "Steel Bridge Construction," 2471 , “Structural Metals,” 3321 , “Gray Iron Castings,” the Plans, and the following: Before the start of Work, the supplier will be qualified on Approved Suppliers for Fabricated Structural Metals Products list as maintaine d by the Structural Metals Engineer on the Bridge Office website or become qualified. To become qualified, the supplier is to submit a Quality Manual (QM) to the Bridge Engineer for review and acceptance, at least 60 Calendar Days before beginning Work. The QM is to meet the requirements of the MnDOT Supplier Qualification Standard which will be the basis for acceptance by the Bridge Engineer . Upon acceptance of the QM, a supplier is qualified and will be listed on the Approved Suppliers for Fabricated Stru ctural Metals Products list. In addition to routine inspections, the Bridge Engineer will audit suppliers with approved QMs on a biannual or annual basis or as otherwise directed by the Bridge Engineer to ensure the implementation of the QM. The Department will invoke its Corrective Action Process if the routine inspections or audits indicate non -conformance. Corrective actions deemed appropriate by the Bridge Engineer , are effective immediately and apply to any Work remaining on a current and future Projects . If the Bridge Engineer determines that Work does not comply with the QM or that fabrication does not follow approved fabrication procedures, the Bridge Engineer will deem the Materials as non -conforming in accordance with 1503 , “Conformity with Contract Documents,” and 1512 , “Unacceptable and Unauthorized Work.” If the Bridge Engineer finds non -conforming Work, direct the supplier to immediately correct the procedure and submit a written Nonconf ormance Report , containing data required by the Bridge Engineer to ensure compliance with the QM, Specifications , and drawings. Perform additional testing as required by the Bridge Engineer , at no additional cost to th e Department. For repeat offences or negligence, the Department will require corrective action of hiring a third -party Quality Control Inspector, a