This standard provides the scope, normative references, product classification, models, structural forms and specifications, requirements, test methods, inspection rules, markings, packaging, general principles for transportation and storage of spherical steel bearings for urban bridge beams. This standard is applicable to spherical steel bearings with vertical bearing capacity ranging from 1000 kN to 60000 kN for urban bridges. Spherical steel bearings used in highway bridges, rail transit, and other engineering structures can be referred to for implementation. The provisions contained in the following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 699 Technical Conditions for High Quality Carbon Structural Steel GB/T 700 Carbon Structural Steel GB/T 1033.1 Plastics - Determination of Density of Non cellular Plastics - Part I: Immersion Method, Liquid Pycnometer and Titration Methods (GB/T 1033.1-2008, ISO 1183-1; 2004, IDT) GB/T 1040 Plastics Determination of Tensile Properties (GB/T 1040-2006, ISO 527-3,1SO 527-1, IDT) GB/T 3280-2007 Stainless Steel Cold Rolled Sheet and Strip GB/T 3398.1-2008 Indentation Hardness (H132/60) GB/T 4956 Measurement of Nonmagnetic Coating Thickness on Magnetic Metal Substrates Magnetic Methods GB/T 7233-2009 Ultrasonic Testing and Quality Rating Methods for Steel Castings GB/T 11352 General Engineering Carbon Steel Castings GB/T 11379 Metal Coating Engineering Chromium Electroplated Coatings (neq 1SO 6-158; 1984) GB/T 17955-2009 Bridge Spherical Bearings GB/T 20878-2007 Stainless Steel and Heat-resistant Steel Grades and Chemical Composition HG/T 2502 Silicone Resin JTG D62-2004 Design Specification for Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts JTJ 025-1986 Design Specification for Steel and Wood Structures of Highway Bridges and Culverts JTJ041 Technical Specification for Construction of Highway Bridges and Culverts JT/T 722-2008 Technical Conditions for Anticorrosive Coating of Highway Bridge Steel Structures TB/T 2331-2004 Railway Bridge Basin Rubber Bearings
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