1. Structural Typology and Geometry.

The footbridge is designed as a suspension structure with a constant depth crossing the A-43 highway, accessed via lateral approach ramps. The total length of the project is 153.50 m, featuring a main span of 148.00 m. This makes it the longest-span suspension footbridge in Spain.

The deck consists of a composite section integrated by an open steel trough girder (box girder) with transverse stiffeners (ribs) spaced every 3.00 m. This steel skeleton supports a 15.80 cm composite slab (steel decking).

2. Longitudinal Profile and Cross-Section

• Structural Depth: A constant depth of 85 cm at the centerline.

• Vertical Alignment: A curved geometry in elevation enhances the aesthetic expression while strictly adhering to a maximum longitudinal gradient of 6% for accessibility compliance.

• Slenderness Ratio: The structure is highly slender, with a depth-to-span ratio of 1/170.

• Clear Width: 5.00 m total, partitioned into a 2.50 m pedestrian lane and a 2.50 m cycling lane, facilitating bidirectional traffic.

3. Suspension System and Pylons

The deck is suspended by central cables (85 mm) following a parabolic profile to act as the antifunicular of the loads. These cables are arranged in planes inclined at 10° relative to the vertical axis.

The suspension system is supported by two inclined steel pylons (76.97° to the horizontal), reaching a height of over 20.00 m above the deck level.

4. Stay Cables and Anchorages

The main span cables are continuous with the backstays (stay cables) via a specialized transition piece at the pylon head. These backstays maintain the same 10° lateral inclination.

• Backstay Specifications: Closed-strand cables (105 mm).

• Foundation: Anchored into reinforced concrete gravity blocks (deadman anchors).

5. Architectural Symbolism

The forward inclination of the pylons toward the main span over the highway carries symbolic weight, representing the link between Ciudad Real and Miguelturra. The A-frame configuration evokes a “gateway” or portal for both municipalities.