The upper structure of steel arch bridge is primarily composed of:

• Arch ring
• Suspension rod (or arch column)
• Tie rod
• Bridge beam

• Section form: Steel box arch, steel pipe arch, steel truss arch
• Space posture: Parallel arch ribs, basket arch ribs, butterfly arch ribs
• Carriageway position: Upper bearing, middle bearing, lower bearing type
• Boom layout: Parallel vertical boom, inclined boom, mesh boom

• Simple system arch bridge: Only arch ring as main force component
• Combined system arch bridge: Carriageway beam and arch combination

Steel arch can be designed as truss arch, box arch, or plate arch. Truss arch bridges are particularly suitable for large spans.

The main load-bearing members that primarily withstand axial pressure and partial bending moment. Available in box, pipe, or truss type sections.

Force transfer components that transmit deck loads to arch ribs. Available as rigid (steel pipe/section steel) or flexible (high-strength steel wire) configurations.

For non-thrust arches, bearing the arch's thrust through axial tension. Available in rigid or flexible configurations.

Ensures transverse stiffness and stability, with common configurations including one-word, K-shaped, X-shaped, and meter-shaped braces.