In this section, the term connections is used in a general sense to include all types of joints in structural steel made with fasteners or welds. Emphasis, however, is placed on the more commonly used connections, such as beam-column connections, main-member splices, and truss connections. Recommendations apply to buildings and to both highway and railway bridges unless otherwise noted. This material is based on the specifications of the American Institute of Steel Construction (AISC), ‘‘Load and Resistance Factor Design Specification for Structural Steel Buildings,’’ 1999, and ‘‘Specification for Structural Steel Buildings—Allowable Stress Design and Plastic Design,’’ 1989; the American Association of State Highway and Transportation Officials (AASHTO), ‘‘Standard Specifications for Highway Bridges,’’ 1996; and the American Railway Engineering and Maintenance-of-Way Association (AREMA), ‘‘Manual,’’ 1998.

—–5.1. Limitations on Use of Fasteners and Welds
—–5.2. Bolts in Combination with Welds
—–5.3. High-Strength Bolts, Nuts, and Washers
—–5.4. Carbon-Steel or Unfinished (Machine) Bolts
—–5.5. Welded Studs
—–5.6. Pins
—–5.7. Fastener Diameters
—–5.8. Fastener Holes
—–5.9. Minimum Number of Fasteners
—–5.10. Clearances for Fasteners
—–5.11. Fastener Spacing
—–5.12. Edge Distance of Fasteners
—–5.13. Fillers
—–5.14. Installation of Fasteners
—–5.15. Welding Materials
—–5.16. Types of Welds
—–5.17. Standard Welding Symbols
—–5.18. Welding Positions
—–5.19. Limitations on Fillet-Weld Dimensions
—–5.20. Limitations on Plug and Slot Weld Dimensions
—–5.21. Welding Procedures
—–5.22. Weld Quality
—–5.23. Welding Clearance and Space
—–5.24. Minimum Connections
—–5.25. Hanger Connections
—–5.26. Tension Splices
—–5.27. Compression Splices
—–5.28. Column Base Plates
—–5.29. Beam Bearing Plates
—–5.30. Shear Splices
—–5.31. Bracket Connections
—–5.32. Connections for Simple Beams
—–5.33. Moment Connections
—–5.34. Beams Seated Atop Supports
—–5.35. Truss Connections
—–5.36. Connections for Bracing
—–5.37. Crane-Girder Connections